| Change log for patch v2.5.34 |
|---|
Summary of changes from v2.5.33 to v2.5.34
============================================
<green@angband.namesys.com>
Add displaying of more reiserfs statistical info through /proc interface, by Nikita Danilov
<green@angband.namesys.com>
Corrected calculation of amount of blocks that file occupies on reiserfs.
<green@angband.namesys.com>
Implemented new block allocator for reiserfs, new tail policy for smaller tails.
New block allocator contains code from Alexander Zarochencev, Jeff Mahoney and Oleg Drokin.
<laforge@gnumonks.org>
MAINTAINERS: Update NETFILTER entry.
<skip.ford@verizon.net>
include/asm-sparc64/hardirq.h: Comment fix.
<ica2_ts@csv.ica.uni-stuttgart.de>
include/net/tcp.h: Use ____cacheline_aligned
<c-d.hailfinger.kernel.2002-07@gmx.net>
net/ipv4/netfilter/ipchains_core.c: Fix MODULE_LICENSE
<davem@nuts.ninka.net>
[IGMP]: Make ip_mc_dec_group return void.
<laforge@gnumonks.org>
[NETFILTER]: Fix OOPS in ipt_ULOG
- If an iptables rule is using --ulog-nlgroup with a
value greated than 4, we crash
- Remove a memory leak when someone throws packets at
the ulog netlink socket
<davem@nuts.ninka.net>
net/core/dst.c: asm/bitops.h --> linux/bitops.h
<davem@nuts.ninka.net>
drivers/net/ppp_generic.c: Fix byte-aligned packets, nearly every arch csum_partial cannot handle this.
<davem@nuts.ninka.net>
arch/sparc64/kernel/ioctl32.c: Handle SIOCDEVPRIVATE transparently.
<davem@nuts.ninka.net>
drivers/net/ppp_generic.c: Fix skb_put len arg when copying unaligned skb.
<torvalds@home.transmeta.com>
De-queue the floppy request late, so that the higher levels
know the floppy driver is busy.
<davem@nuts.ninka.net>
[SPARC]: Fix build breakage.
- Update for PCI config space access api changes
- Handle new do_fork args
- Delete SET/CLEAR TID handling from copy_thread
- Update arch/sparc64/defconfig
<jmorris@intercode.com.au>
net/ipv6/af_inet6.c: Fix __FUNCTION__ pasting.
<jmorris@intercode.com.au>
net/ipv4/netfilter/ipfwadm_core.c: Fix build bustage when debugging is enabled.
<davem@nuts.ninka.net>
net/ipv4/netfilter/ip_nat_helper.c: Fix __FUNCTION__ pasting.
<nmiell@attbi.com>
net/sctp/sm_make_chunk.c: Fix typo.
<hirofumi@mail.parknet.co.jp>
[PATCH] remove BUG_ON(p->ptrace) in release_task()
The BUG_ON(p->ptrace) will be called if the CLONE_DETACH process is
traced. This patch removes BUG_ON(p->ptrace), and also removes a
workaround for it in sys_wait4().
<hch@sb.bsdonline.org>
JFS: use jfs_file_inode_operations for special files aswell
<hch@sb.bsdonline.org>
JFS: sanitize naming of ea read/write functions, add missing statics
<ray-lk@madrabbit.org>
[PATCH] Re: 2.5.33 PNPBIOS does not compile
I don't know if the current form is harmless or not, but it is
definitely incorrect. The patch below corrects the compile failure, as
well as the multi-statement macro defines used in bare if statements;
please apply.
<hch@sb.bsdonline.org>
JFS: Remove unused file jfs_extendfs.h
JFS/Linux implements resizing by remount.
<hch@sb.bsdonline.org>
JFS: remove some cruft left over from the pre-mempool metapage code
<hch@sb.bsdonline.org>
JFS: use buffer_heads to access the superblock
<hch@sb.bsdonline.org>
JFS: use block device inode/mapping instead of direct_inode/direct_mapping
Change __get_metapage to use the block device mapping to back metapages
that are addresses by filesystem relative blocks. Remove all code to
implement the JFS-private per-filesystem mapping and fake inode.
<davem@nuts.ninka.net>
drivers/net/ppp_generic.c: Allocate right length in unaligned SKB fix.
<hch@sb.bsdonline.org>
JFS: ifdef out unused functions related to partial blocks
<hch@sb.bsdonline.org>
JFS: remove superflous externs for generic_file_ functions
<hch@sb.bsdonline.org>
JFS: remove superflous return at the end of lbmIODone
<davem@nuts.ninka.net>
arch/sparc64/kernel/ioctl32.c: Translate PPPIOCS{PASS,ACTIVE}
<hch@sb.bsdonline.org>
JFS: Don't include <linux/smp_lock.h> in jfs_dtree.c
<kai@tp1.ruhr-uni-bochum.de>
kbuild: Remove CONFIG_DEVFS_FS from arch/ia64/config.in
Defining CONFIG_DEVFS_FS in two different places does not work correctly.
Nobody objected on linux-ia64, so I just removed the statements
unconditionally enabling devfs on IA64/SNI.
Pointed out by Greg Banks.
<kai@tp1.ruhr-uni-bochum.de>
ISDN: Fix __FUNCTION__ usage
<kai@tp1.ruhr-uni-bochum.de>
ISDN: cleanups / overflow check
Based on work done by Solar Designer for 2.2
<kai@tp1.ruhr-uni-bochum.de>
ISDN: One last ISDN designated initializer
(by Rusty Russell)
<kai@tp1.ruhr-uni-bochum.de>
ISDN: Remove __NO_VERSION__
#define __NO_VERSION__ has been unnecessary for a long time, so here it
goes...
(Rusty Russell)
<kai@tp1.ruhr-uni-bochum.de>
kbuild: Fix export-objs
Fix various Makefiles to really list the objects which use EXPORT_SYMBOL.
Patch by "Lightweight Patch Manager".
<kai@tp1.ruhr-uni-bochum.de>
kbuild: fix ACPI Config.in breakage
Christoph Hellwig:
bools don't have depencies, only dep_bools do. Use three-space indents.
<kai@tp1.ruhr-uni-bochum.de>
drivers/char/sonypi.h: Fix __FUNCTION__ usage
<kai@tp1.ruhr-uni-bochum.de>
include/linux/ptrace.h: fix includes
ptrace.h needs struct task_struct, so we need to include <linux/sched.h>.
<kuznet@ms2.inr.ac.ru>
net/ipv4/tcp_output.c: Fix crashes due to bugs in TSO.
<paulus@samba.org>
PPC32: Convert the various PCI config space accessors to the new API.
<torvalds@kiwi.transmeta.com>
Fix sonipi driver to not do __FUNCTION__ pasting.
<davem@nuts.ninka.net>
arch/sparc64/lib/VIScsum.S: Do not use VIS on oddly aligned buffer.
<davem@nuts.ninka.net>
drivers/net/ppp_generic.c: Revert my idiotic unaligned SKB changes.
<davem@nuts.ninka.net>
arch/sparc64/lib/VIScsum.S: Fix endianness bugs in previous change.
<hch@sb.bsdonline.org>
JFS: sync blockdevice at umount
We need to sync the blockdevice mapping at umount although sync_blockdev
already does it as we need to make sure everything hits the disk before
we mark the superblock clean.
Found by Dave Kleikamp.
<hch@sb.bsdonline.org>
JFS: fix up more merge issues
The BK merging was a little too smart for the conflicting changes.
Add back what we lost with the last changeset.
<hch@sb.bsdonline.org>
JFS: we still need extHint
<torvalds@home.transmeta.com>
Major partial request completion boo-boo in the bio layer.
This was _bad_. Major floppy corruption, and possibly the reason
for other block device corruption for any driver that generated
partial results for a block device request.
<torvalds@home.transmeta.com>
Fix floppy driver end_request() handling - it used to do insane
contortions instead of just calling "end_that_request_first()" with
the proper sector count.
<geert@linux-m68k.org>
[PATCH] duplicate declaration of pci_lock
Kill duplicate declaration of pci_lock
<jmorris@intercode.com.au>
[PATCH] sigio/sigurg cleanup for 2.5.32
This is a cleanup of the sigio/sigurg code.
Summary:
o Removed sk->proc, SIGURG now sent via vfs, credentials checked
during delivery.
o SIOCSPGRP etc. ioctls use vfs, and work now for SIGIO as well
as SIGURG.
o Removed socket fcntl code.
o Consolidate lsm file_set_fowner() hooks.
o Fixed fowner race.
o Fixed associated mainline memory leak in fcntl_dirnotify().
<rml@tech9.net>
[PATCH] flag type cleanup
This fixes various instances of the interrupt flag variable not being
the proper `unsigned long', most notably kernel/softirq.c ...
<rml@tech9.net>
[PATCH] bad: schedule() with irqs disabled!
OK, Linus, you are right... there are enough instances of this we are
not going to find them all (although I suspect Andrew's slab.c fixes
will cover most of the cases). Further, I think we can should actually
purposely call preempt_schedule() in certain cases after interrupt
reenable to check for reschedules...
Let's just make it a rule "no preemption if interrupts are off" and
enforce that.
<davem@nuts.ninka.net>
arch/sparc64/kernel/ioctl32.c: Frob cmd in PPPIOCS{PASS,ACTIVE}.
<ac9410@attbi.com>
[PATCH] 2.5.33 dmi_scan blacklist ibm thinkpad for i2c/sensors
This adds IBM thinkpads to a list of mainboards that should not be
scanned by i2c sensors during detection phase.
<akpm@zip.com.au>
[PATCH] place rmap locking in rmap-locking.h
The rmap locking inlines are causing some header file
dependency/ordering problems - move them out of page-flags.h and into
their own header file.
<akpm@zip.com.au>
[PATCH] convert node/zone_start_paddr to pfns
I've had ia32-discontigmem under test for a month, uneventfully. Possibly
because I don't have a machine to test it on....
A major part of this work is a general move to convert the low-level
memory management to consistently use pageframe numbers. It's a bit
schizo at present..
This patch was written by Martin Bligh. A version of this patch is in
the 2.4 aa tree.
It changes the unsigned longs node_start_paddr and zone_start_paddr to
page frame numbers. This is necessary because a PAE address is 36 bits
and cannot be represented in an unsigned long.
- The per-node physical memory start address node_start_paddr becomes
a pfn, node_start_pfn.
- The per-zone physical memory start address zone_start_paddr becomes
a pfn, zone_start_pfn.
- free_area_init_node() takes a pfn rather than a physical address.
Patricia has tested this patch on the following configurations: UP,
SMP, SMP PAE, multiquad, multiquad PAE, multiquad DISCONTIGMEM,
multiquad DISCONTIGMEM PAE.
<akpm@zip.com.au>
[PATCH] reorganise setup_arch() for ia32 discontigmem
This restructures setup_arch() for i386 to make it easier to include the
i386 numa changes (for CONFIG_DISCONTIGMEM) I've been working on. It
also makes setup_arch() easier to read. A version of this patch is the
in 2.4 aa tree.
This does not depend on the other patches I'm submitting today, but my
discontigmem patch does depend on this one.
I've tested this patch on the following configurations: UP, SMP, SMP
PAE, multiquad, multiquad PAE.
<akpm@zip.com.au>
[PATCH] restructure mem_init for ia32 discontigmem
- Pull the middle out of one_highpage_init() so that the i386 NUMA
patch can call it on a per-page basis.
- Move a few lines out of mem_init() into the new
set_max_mapnr_init(), which the i386 NUMA code requires.
<akpm@zip.com.au>
[PATCH] discontigmem support for ia32 NUMA
- All the support macros which assume a linear mem_map[] have been
wrapped in !CONFIG_DISCONTIGMEM. pfn_to_page, page_to_pfn,
page_to_phys, pmd_page, kern_addr_valid.
- Move some initialsation macros into setup.h so they can be used in
the i386 discontig.c (INITRD_START, INITRD_SIZE).
- Alternate version of the bootmem allocator
- add i386 discontig support and numaq support.
<akpm@zip.com.au>
[PATCH] use page_to_pfn() instead of mem_map[]
A patch from Martin Bligh which cleans up the open-coded uses of
mem_map for ia32. Basically it replaces
mem_map + pagenr
with
pfn_to_page(pagenr)
in lots of places. Because mem_map[] doesn't work like that with
discontigmem.
It also fixes a bug in bad_range, that happens to work for contig mem
systems, but is incorrect. Tested both with and without discontigmem
support.
<Andries.Brouwer@cwi.nl>
[PATCH] try more sd.c MODE SENSE modes
In sd.c we call MODE SENSE (6) in order to find out whether the
device is write protected. The info we need is in byte 2, the
header of the MODE SENSE answer, but in the request we have to
specify (i) what page(s) we want, and (ii) how many bytes we want.
Long ago we asked for 12 bytes from page 1 (Daniel Roche, 1.3.35).
Matthew Dharm made this 8 bytes from page 3F (all pages), patch-2.4.0-test8.
In patch-2.4.10 the 8 was increased to 255.
I found on the one hand devices that only react to page 0
(the vendor page), and return an error for page 3F.
And on the other hand devices that are unable to handle requests
for more bytes than they actually have.
So, it seems that the cautious way to ask for MODE SENSE data is
to first ask for the header only, see how much is available,
and then ask for everything.
The patch below first separates out the MODE SENSE call,
and then tries it three times: on all pages (3F), only the first
four bytes; on the vendor page (0), only the first four bytes;
on all pages (3F), 255 bytes.
This should be at least as robust as our current code.
I tried it on 8 SCSI devices (of which 2 fail under 2.5.33)
and found no problems.
<Andries.Brouwer@cwi.nl>
[PATCH] sddr09.c MODE SENSE fixes
Teach usb/storage/sddr09.c how to return less than a full page of sense
data.
<ak@muc.de>
[PATCH] Fix RELOC_HIDE miscompilation
RELOC_HIDE got miscompiled on gcc3.1/x86-64 in the access to softirq.c's per
cpu variables. This fixes the problem.
Clearly to hide the relocation the addition needs to be done after the
value obfuscation, not before.
I don't know if it triggers on other architectures (x86-64 is especially
stressf here because it has negative kernel addresses), but seems like the
right thing to do.
<rusty@rustcorp.com.au>
[PATCH] Early child_reaper initialization
This sets child_reaper to the idle thread upon creation, so that
ksoftirqd's reparent_to_init call doesn't get the swapper as parent.
<rusty@rustcorp.com.au>
[PATCH] daemonize() calls reparent_to_init cleanup
This makes daemonize() call reparent_to_init() itself, as long
suggested for 2.5, and fixes the callers so they don't call it again.
Also fixes callers which set current->tty to NULL themselves (also
no longer neccessary).
<rusty@rustcorp.com.au>
[PATCH] Important per-cpu fix.
Frankly, I'm amazed the kernel worked for long without this.
Every linker script thinks the section is called .data.percpu.
Without this patch, every CPU ends up sharing the same "per-cpu"
variable.
This might explain the wierd per-cpu problem reports from Andrew and
Dave, and also that nagging feeling that I'm an idiot...
<rusty@rustcorp.com.au>
[PATCH] list_t removal
This removes list_t, which is a gratuitous typedef for a "struct
list_head". Unless there is good reason, the kernel doesn't usually
typedef, as typedefs cannot be predeclared unlike structs.
<paulus@au1.ibm.com>
PPC32: remove unnecessary includes in ppc_ksyms.c
<paulus@au1.ibm.com>
PPC32: add the extra argument for do_fork to the PPC calls.
<paulus@samba.org>
PPC32: update some initializers to the standard format, from Rusty.
<paulus@samba.org>
PPC32: Put back an export-objs that someone incorrectly removed.
<paulus@samba.org>
PPC32: moved the compatibility padding entries in the aux vector
to the bottom of the aux table.
<paulus@samba.org>
PPC32: Correct a comment about soft/hardirq masks in asm-ppc/hardirq.h
<paulus@samba.org>
PPC32: fix a comment in asm-ppc/semaphore.h (extraneous "the")
<paulus@samba.org>
PPC32: use page_to_pfn instead of page - mem_map in a couple of places
<paulus@samba.org>
PPC32: remove a couple of unused files.
<paulus@au1.ibm.com>
[PATCH] fix create_elf_tables on PPC
create_elf_tables in fs/binfmt_elf.c now sets up the list of aux table
entries in a buffer on the kernel stack before copying it to the user
stack.
Unfortunately, while the buffer is big enough for most architectures, it
isn't big enough on PPC, which uses 5 extra aux table entries (put on
with ARCH_DLINFO). The following patch increases the buffer to be big
enough for PPC. (Note that each aux table entry uses two elements of
the elf_info array.)
<willy@debian.org>
[PATCH] move AGP PCI defines to pci_ids.h
Unify the PCI device ID constants used by AGP with the normal Linux ones.
<torvalds@home.transmeta.com>
Fix IO-APIC edge IRQ handling. IRQ_INPROGRESS was cleared spuriously
if a new edge happened while we were still processing the previous
one.
Then, if a _third_ edge came in, it would actually cause a reentrant
irq handler invocation, because the original INPROGRESS bit was now
lost.
This was actually seen on IDE in PIO mode.
<viro@math.psu.edu>
[PATCH] IDE cleanups (2.5; similar to ones done for other drivers)
OK, before the next bunch of gendisk merges, here comes a couple
of 2.5 IDE cleanups.
a) exclusion between rereading partition tables and open() is done
in fs/block_dev.c these days, so homegrown one in ide.c is redundant - that
code _never_ blocks now. Removed, just as it had been done with counterparts
in other drivers.
b) blk_ioctl() calls are done in blkdev_ioctl() now; driver doesn't
need to handle them. Again, removed as it had been done in all other drivers.
<andrea@suse.de>
[PATCH] Missing acess_ok() check in aio
BTW, while merging aio from 2.5 to 2.4 and fixing and porting the libaio
(in particular thanks to one of Ben's testcases that was checkin for
this specific case) I found this bug in 2.5
<davidm@napali.hpl.hp.com>
[PATCH] trivial Makefile fix
Tthis one seems to have been around since 2.5.31 and nobody has fixed it
yet...
<ac9410@attbi.com>
[PATCH] 2.5.33 i2c-proc.c remove inode_fill code
My previous patch added procs i2c_fill_inode and i2c_dir_fill_inode that
Al Viro deemed unnecessary. i2c developers are in contact with Al to
get the latest scoop. Meantime lets reverse the change before he flies
off at me about procfs abuse.
<kai@tp1.ruhr-uni-bochum.de>
kbuild: Preprocess vmlinux.lds on i386 as well.
We want do so on all architectures for consistency, and i386 will need
the preprocessing soon anyway.
<mingo@elte.hu>
[PATCH] ptrace-fix-2.5.33-A1
This contains Daniel's suggested fix that allows a parent to
PTRACE_ATTACH to a child it forked. That fixes the incorrect BUG_ON()
assert that Ogawa's patch was intended to fix, and we thus undo Ogawa's
patch.
I've tested various ptrace uses and they appear to work just fine.
<mingo@elte.hu>
[PATCH] pid-max-2.5.33-A0
This is the pid-max patch, the one i sent for 2.5.31 was botched. I
have removed the 'once' debugging stupidity - now PIDs start at 0 again.
Also, for an unknown reason the previous patch missed the hunk that had
the declaration of 'DEFAULT_PID_MAX' which made it not compile ...
<torvalds@penguin.transmeta.com>
Make in-kernel inode 'nlink' field be "unsigned int" instead
of something arch-dependent and usually less.
We may want to do value limiting in generic_fillattr() if people
end up caring.
<vandrove@vc.cvut.cz>
[PATCH] IDE cleanup (1.612) broke all fdisks I have...
It is nice that blkdev_ioctl calls blk_ioctl itself, but unfortunately
it does that only if driver's ioctl returns -EINVAL - and IDE returns
-EIO :-(
Patch below is tested for disks - I do not have IDE floppy nor IDE tape.
<torvalds@home.transmeta.com>
Finally get rid of that irritating disk change message.
<mingo@elte.hu>
[PATCH] more ptrace updates
I've done the attached patch to collect & clean up all the things that
happened since yesterday.
<dan@debian.org>
[PATCH] More ptrace fixes for 2.5.33
Here are the changes I have
- Fix some bugs I introduced in zap_thread
- Improve the check for traced children in sys_wait4
- Fix parent links when using CLONE_PTRACE
My thanks to OGAWA Hirofumi for pointing out the first bit.
The only other issue I know of is something else Hirofumi pointed out
earlier; there are problems when a tracing process dies unexpectedly. I'll
come back to that later.
<ink@jurassic.park.msu.ru>
[PATCH] alpha: pci_ops update
Tested on CIA (sparse config space) and Irongate (dense config space);
other platforms should work as they are similar to these two.
Access config space directly on rx164.
<ink@jurassic.park.msu.ru>
[PATCH] alpha: compile fixes
- add another argument to do_fork();
- assorted compile fixes.
<ink@jurassic.park.msu.ru>
[PATCH] alpha: misc fixes
Patch set from Jay Estabrook:
- include/asm-alpha/dma.h:
Add MAX_DMA_ADDR for SABLE and ALCOR
- include/asm-alpha/floppy.h:
enable the full CROSS_64KB macro for all platforms
- include/asm-alpha/core_t2.h:
fix HAE usage
- arch/alpha/kernel/pci.c:
fiddle with quirk_cypress
- arch/alpha/kernel/traps.c:
prevent opDEC_check() from multiple calls (EV4 SMP SABLEs)
- arch/alpha/kernel/proto.h:
make t2_pci_tbi() real
- arch/alpha/kernel/time.c:
shorten timeout delay
- arch/alpha/kernel/sys_alcor.c:
use ALCOR_MAX_DMA_ADDR because of the 1GB limit on ISA devices
- arch/alpha/kernel/core_t2.c:
add S/G support and allow direct-map to handle 2GB of memory
- arch/alpha/kernel/core_tsunami.c:
rework alignment requirements for ISA DMA, esp. for ACER platforms
- arch/alpha/kernel/sys_sable.c:
fix MAX_DMA_ADDR for the 1GB limitation
- arch/alpha/kernel/pci_impl.h:
add T2_DEFAULT_MEM_BASE to help avoid HAE use
- arch/alpha/kernel/pci_iommu.c:
fix ISA_DMA_MASK calculation, and force ISA alignment to 64KB
<viro@math.psu.edu>
[PATCH] (1/25) Unexporting helper functions
wipe_partitions() and driverfs_register_partitions(..., 1) (i.e.
unregistering them) pulled into del_gendisk() and removed from callers.
grok_partitions() merged with register_disk(). devfs_register_partitions(),
grok_partitions() and wipe_partitions() not exported anymore.
<viro@math.psu.edu>
[PATCH] (2/25) Removing ->nr_real
Since ->nr_real is always 1 now, we can remove that field completely.
Removed the last remnants of switch in disk_name() (it could be killed
a long time ago, I just forgot to remove the last two cases when md and i2o
got converted). Collapsed several instances of
disk->part[minor - disk->first_minor] - in cases when we know that we deal
with disk->part[0].
<viro@math.psu.edu>
[PATCH] (3/25) Removing useless minor arguments
driverfs_remove_partitions(), devfs_register_partitions(),
driverfs_create_partitions(), devfs_register_partition(), devfs_register_disc(),
had lost 'minor' argument - it's always disk->first_minor these days.
disk_name() takes partition number instead of minor now. Callers of
wipe_partitions() in fs/block_dev.c expanded. Remaining caller passes
gendisk instead of kdev_t now.
<viro@math.psu.edu>
[PATCH] (4/25) Unexporting driverfs_remove_partitions()
call of driverfs_remove_partitions() pulled into del_gendisk();
function isn't exported anymore. Both it and driverfs_create_partitions()
cleaned up.
<viro@math.psu.edu>
[PATCH] (5/25) Removing bogus arrays - ->flags[]
Seeing that now disk->flags[] always consists of one element, we
replace char *flags with int flags, remove the junk from places that used
to allocate these "arrays" and do obvious updates of the code
(s/->flags[0]/->flags/).
<viro@math.psu.edu>
[PATCH] (6/25) Removing bogus arrays - ->driverfs_dev_arr[]
disk->driverfs_dev_arr is either NULL or consists of exactly one
element. Same change as above (struct device ** -> struct device *); old
"is the pointer to array itself NULL or not?" replaced with a flag (in
disk->flags).
<viro@math.psu.edu>
[PATCH] (7/25) Removing bogus arrays - ->part[].number
Each hd_struct used to have int number; in it. It's used _only_
in disk->part[0] - disk->part[n].number is never assigned/checked for any
positive n. Moved from hd_struct to gendisk (disk->part[0].number to
disk->number).
<viro@math.psu.edu>
[PATCH] (8/25) Removing bogus arrays - ->de_arr[]
similar to ->flags and ->driverfs_dev_arr, ->de_arr[] got replaced
with its (single) element + flag.
<viro@math.psu.edu>
[PATCH] (9/25) update_partition()
new helper - update_partition(disk, partition_number); does the
right thing wrt devfs and driverfs (un)registration of partition entries.
BLKPG ioctls fixed - now they call that beast rather than calling only
devfs side. New helper - rescan_partitions(disk, bdev); does all work
with wiping/rereading/etc. and fs/block_dev.c now uses it instead of
check_partition(). The latter became static.
<viro@math.psu.edu>
[PATCH] (10/25) sr.c device name handling
sr.c: we set SCp->cdi.name from the very beginning, which allows
to kill passing minors in many cases (we can use "%s...", SCp->cd.name instead
of "sr%d...", minor and that turns out to be the majority of places where
we use minors at all).
<viro@math.psu.edu>
[PATCH] (11/25) sr.c naming cleanup
Global search'n'replace job - 'SCp' (Scsi_CD pointer - I'm not kidding;
and yes, they spell it "Scsi") replaced with 'cd' (sr.c, sr_ioctl.c,
sr_vendor.c).
<viro@math.psu.edu>
[PATCH] (12/25) sr.c passes pointers instead of minors now
killed passing minors around; we always pass a pointer to structure;
scsi_CDs made static. That killed uses of cdi->dev in sr.c and friends.
<viro@math.psu.edu>
[PATCH] (13/25) sbpcd.c - beginning of cleanup
sbpcd.c - sigh... It used to have a global variable inventively called
'd'. Current disk number. Tons of uses, 99% of them being D_S[d].<blah>.
Added a new variable - current_drive. Said animal is equal to D_S + d -
it's reassigned at the same place as d.
<viro@math.psu.edu>
[PATCH] (14/25) sbpcd.c - use *current_drive instead of D_S[d]
sbpcd.[c,h] - uses of D_S[d] replaced with uses of *current_drive.
<viro@math.psu.edu>
[PATCH] (15/25) sbpcd.c - killed useds of cdi->dev
sbpcd.c - d eliminated, ditto for uses of cdi->dev (we set cdi->handle
pointing to structure we neeed). Cleaned up a bit.
<viro@math.psu.edu>
[PATCH] (16/25) pcd.c - beginning of macroectomy
pcd.c - killed RR and WR macros (replaced with inlines without hidden
arguments; the first step in cleanup, they were monstrous).
<viro@math.psu.edu>
[PATCH] (17/25) Lindent pcd.c
Lindent pcd.c.
<viro@math.psu.edu>
[PATCH] (18/25) pcd.c - cleanup, killed used of cdi->dev
pcd.c cleaned up, uses of cdi->dev eliminated, abuse of macros killed
(it used to have
#define PCD pcd[unit]
#define PI PCD.pi
and expected 'unit' to be local variable in each function that used these
(== almost every function in there)).
<viro@math.psu.edu>
[PATCH] (19/25) mcdx.c cleanup
mcdx.c cleaned up, uses of cdi->dev eliminated
<viro@math.psu.edu>
[PATCH] (20/25) cdu31a.c cleanup
minor cleanup in cdu31a.c
<viro@math.psu.edu>
[PATCH] (21/25) cdrom->reset() cleanup
invalidate_buffers() pulled from cdrom ->reset() into its caller.
At that point only cdrom.c using cdi->dev. That will play a bit later.
<viro@math.psu.edu>
[PATCH] (22/25) gendisks for SCSI cdroms
SCSI cdroms got gendisks.
<viro@math.psu.edu>
[PATCH] (23/25) move pointer to gendisk from hwif to drive
ide switched from hwif->gd[i] to hwif->drive[i]->disk - IOW, instead
of array of two pointers to gendisks refered from hwif, we keep these pointers
in relevant drives. Cleaned up.
<viro@math.psu.edu>
[PATCH] (24/25) disk capacity helpers
new helpers - get_capacity(gendisk)/set_capacity(gendisk, sectors).
Drivers switched to these; that eliminates most of the accesses to
disk->part[]... in the drivers (and makes code more readable, while
we are at it). That had caught several bugs when minor had been
used in place of minor>>minor_shift (acsi.c is especially nasty in
that respect; I don't know if it had ever been used with multiple
devices...)
<viro@math.psu.edu>
[PATCH] (25/25) more cleanups of struct gendisk.
* we remove the paritition 0 from ->part[] and put the old
contents of ->part[0] into gendisk itself; indexes are shifted, obviously.
* ->part is allocated at add_gendisk() time and freed at del_gendisk()
according to value of ->minor_shift; static arrays of hd_struct are gone
from drivers, ditto for manual allocations a-la ide. As the matter of fact,
none of the drivers know about struct hd_struct now.
<torvalds@home.transmeta.com>
Fsck knows why the devil does st.c has to call something a partition,
but it does...
<torvalds@home.transmeta.com>
Avoid unused variable if CONFIG_BLK_DEV_MD isn't defined.
<rwhron@earthlink.net>
[PATCH] qlogic "this should not happen" fix
This patch is based on changes I've used for 2.5.31, 2.5.31-mm1,
2.5.32-mm1, 2.5.32-mm2, and 2.5.33-mm1.
Without the patch, 2.5.x during heavy benchmark/stress testing
eventually locks up with these final messages:
kernel: qlogicfc0 : no handle slots, this should not happen.
kernel: hostdata->queued is 6, in_ptr: 7d
This is a combination of Doug Ledford's patch:
http://marc.theaimsgroup.com/?l=linux-kernel&m=103005703808312&w=2
and Eric Weigle's patch:
http://marc.theaimsgroup.com/?l=linux-kernel&m=103005790509079&w=2
2.5.33 (and all predecessors i've tested) locked up without it.
<ink@jurassic.park.msu.ru>
[PATCH] pci bus resources, transparent bridges
Added PCI_BUS_NUM_RESOURCES as Ben suggested. Default value is 4
and can be overridden by arch (probably in asm/system.h).
pci_read_bridge_bases() and pci_assign_bus_resource() changed
accordingly. "for (i = 0 ; i < 4; i++)" in pci_add_new_bus() not
changed, as it's used _only_ for pci-pci and cardbus bridges.
<mingo@elte.hu>
[PATCH] shared thread signals
Support POSIX compliant thread signals on a kernel level with usable
debugging (broadcast SIGSTOP, SIGCONT) and thread group management
(broadcast SIGKILL), plus to load-balance 'process' signals between
threads for better signal performance.
Changes:
- POSIX thread semantics for signals
there are 7 'types' of actions a signal can take: specific, load-balance,
kill-all, kill-all+core, stop-all, continue-all and ignore. Depending on
the POSIX specifications each signal has one of the types defined for both
the 'handler defined' and the 'handler not defined (kernel default)' case.
Here is the table:
----------------------------------------------------------
| | userspace | kernel |
----------------------------------------------------------
| SIGHUP | load-balance | kill-all |
| SIGINT | load-balance | kill-all |
| SIGQUIT | load-balance | kill-all+core |
| SIGILL | specific | kill-all+core |
| SIGTRAP | specific | kill-all+core |
| SIGABRT/SIGIOT | specific | kill-all+core |
| SIGBUS | specific | kill-all+core |
| SIGFPE | specific | kill-all+core |
| SIGKILL | n/a | kill-all |
| SIGUSR1 | load-balance | kill-all |
| SIGSEGV | specific | kill-all+core |
| SIGUSR2 | load-balance | kill-all |
| SIGPIPE | specific | kill-all |
| SIGALRM | load-balance | kill-all |
| SIGTERM | load-balance | kill-all |
| SIGCHLD | load-balance | ignore |
| SIGCONT | load-balance | continue-all |
| SIGSTOP | n/a | stop-all |
| SIGTSTP | load-balance | stop-all |
| SIGTTIN | load-balancen | stop-all |
| SIGTTOU | load-balancen | stop-all |
| SIGURG | load-balance | ignore |
| SIGXCPU | specific | kill-all+core |
| SIGXFSZ | specific | kill-all+core |
| SIGVTALRM | load-balance | kill-all |
| SIGPROF | specific | kill-all |
| SIGPOLL/SIGIO | load-balance | kill-all |
| SIGSYS/SIGUNUSED | specific | kill-all+core |
| SIGSTKFLT | specific | kill-all |
| SIGWINCH | load-balance | ignore |
| SIGPWR | load-balance | kill-all |
| SIGRTMIN-SIGRTMAX | load-balance | kill-all |
----------------------------------------------------------
as you can see it from the list, signals that have handlers defined never
get broadcasted - they are either specific or load-balanced.
- CLONE_THREAD implies CLONE_SIGHAND
It does not make much sense to have a thread group that does not share
signal handlers. In fact in the patch i'm using the signal spinlock to
lock access to the thread group. I made the siglock IRQ-safe, thus we can
load-balance signals from interrupt contexts as well. (we cannot take the
tasklist lock in write mode from IRQ handlers.)
this is not as clean as i'd like it to be, but it's the best i could come
up with so far.
- thread group list management reworked.
threads are now removed from the group if the thread is unhashed from the
PID table. This makes the most sense. This also helps with another feature
that relies on an intact thread group list: multithreaded coredumps.
- child reparenting reworked.
the O(N) algorithm in forget_original_parent() causes massive performance
problems if a large number of threads exit from the group. Performance
improves more than 10-fold if the following simple rules are followed
instead:
- reparent children to the *previous* thread [exiting or not]
- if a thread is detached then reparent to init.
- fast broadcasting of kernel-internal SIGSTOP, SIGCONT, SIGKILL, etc.
kernel-internal broadcasted signals are a potential DoS problem, since
they might generate massive amounts of GFP_ATOMIC allocations of siginfo
structures. The important thing to note is that the siginfo structure does
not actually have to be allocated and queued - the signal processing code
has all the information it needs, neither of these signals carries any
information in the siginfo structure. This makes a broadcast SIGKILL a
very simple operation: all threads get the bit 9 set in their pending
bitmask. The speedup due to this was significant - and the robustness win
is invaluable.
- sys_execve() should not kill off 'all other' threads.
the 'exec kills all threads if the master thread does the exec()' is a
POSIX(-ish) thing that should not be hardcoded in the kernel in this case.
to handle POSIX exec() semantics, glibc uses a special syscall, which
kills 'all but self' threads: sys_exit_allbutself().
the straightforward exec() implementation just calls sys_exit_allbutself()
and then sys_execve().
(this syscall is also be used internally if the thread group leader
thread sys_exit()s or sys_exec()s, to ensure the integrity of the thread
group.)
<akpm@digeo.com>
[PATCH] Fix the boot-time reporting of each zone's available pages
Patch from Bjorn Helgaas, via Rusty.
Change:
On node 0 totalpages: 61031 <--- not including holes
zone(0): 65172 pages. <--- including holes
zone(1): 0 pages. ...
zone(2): 0 pages.
to:
On node 0 totalpages: 61031 <--- not including holes
DMA zone: 61031 pages <--- not including holes
Normal zone: 0 pages
HighMem zone: 0 pages
<akpm@digeo.com>
[PATCH] Fix the __block_write_full_page() error path.
Fix the ENOSPC recovery code in __block_write_full_page()
- Don't write out clean buffers.
- Set PG_writeback before submitting the IO. Otherwise the completion
handler will go BUG when it sees a non-PageWriteback page. If the IO
is very fast, or synchronous.
<akpm@digeo.com>
[PATCH] Back out the initial work for atomic copy_*_user()
Back out the use of preempt_count to signify atomicity wrt pagefaults.
We won't do it that way - in_atomic() works fine.
<akpm@digeo.com>
[PATCH] refill the inactive list more quickly
Fix a problem noticed by Ed Tomlinson: under shifting workloads the
shrink_zone() logic will refill the inactive load too slowly.
Bale out of the zone scan when we've reclaimed enough pages. Fixes a
rarely-occurring problem wherein refill_inactive_zone() ends up
shuffling 100,000 pages and generally goes silly.
This needs to be revisited - we should go on and rebalance the lower
zones even if we reclaimed enough pages from highmem.
<akpm@digeo.com>
[PATCH] atomic copy_*_user infrastructure
The patch implements the atomic copy_*_user() function.
If the kernel takes a pagefault while running copy_*_user() in an
atomic region, the copy_*_user() will fail (return a short value).
And with this patch, holding an atomic kmap() puts the CPU into an
atomic region.
- Increment preempt_count() in kmap_atomic() regardless of the
setting of CONFIG_PREEMPT. The pagefault handler recognises this as
an atomic region and refuses to service the fault. copy_*_user will
return a non-zero value.
- Attempts to propagate the in_atomic() predicate to all the other
highmem-capable architectures' pagefault handlers. But the code is
only tested on x86.
- Fixed a PPC bug in kunmap_atomic(): it forgot to reenable
preemption if HIGHMEM_DEBUG is turned on.
- Fixed a sparc bug in kunmap_atomic(): it forgot to reenable
preemption all the time, for non-fixmap pages.
- Fix an error in <linux/highmem.h> - in the CONFIG_HIGHMEM=n case,
kunmap_atomic() takes an address, not a page *.
<akpm@digeo.com>
[PATCH] Use kmap_atomic() for generic_file_read()
This patch allows the kernel to hold atomic kmaps in file_read_actor().
We try to fault in the page, then take an atomic kmap. If the atomic
copy_to_user() then faults, drop a printk and fall back to kmap().
<akpm@digeo.com>
[PATCH] Use kmap_atomic() for generic_file_write()
This patch uses the atomic copy_from_user() facility in
generic_file_write().
This required a change in the prepare_write/commit_write API
definition. It is no longer the case that these functions will kmap
the page for you.
If any part of the kernel wants to get at the page in the write path,
it now has to kmap it for itself. The best way to do this is with
kmap_atomic(KM_USER0).
This patch updates all callers. It also converts several places which
were unnecessarily using kmap() over to using kmap_atomic().
The reiserfs changes here are Oleg Drokin's revised version.
The patch has been tested with loop, ext2, ext3, reiserfs, jfs,
minixfs, vfat, iso9660, nfs and the ramdisk driver.
I haven't fixed the racy deadlock avoidance thing in
generic_file_write() - the case where we take a fault when the source
and dest of the copy are both the same pagecache page.
There is a printk in there now which will trigger if the page was
unexpectedly not present. And guess what? I get 50-100 of them when
running `dbench 64' on mem=48m. This deadlock can happen.
<mingo@elte.hu>
[PATCH] Re: pinpointed: PANIC caused by dequeue_signal() in current Linus
This fixes the bootup crash. There were two initialization bugs:
- INIT_SIGNAL needs to set shared_pending.
- exec() needs to set up newsig properly.
the second one caused the crash Anton saw.
<hugh@veritas.com>
[PATCH] M386 flush_one_tlb invlpg
CONFIG_M386 kernel running on PPro+ processor with X86_FEATURE_PGE may
set _PAGE_GLOBAL bit: then __flush_tlb_one must use invlpg instruction.
H. J. Lu reports (LKML 8 Sept) that his P4 reboots due to this problem.
<viro@math.psu.edu>
[PATCH] handle_initrd() and request_module()
There are 4 different scenarios of late boot:
1. no initrd or ROOT_DEV is ram0. That's the simplest one - we want
whatever is on ROOT_DEV as final root.
2. initrd is there, ROOT_DEV is not ram0, /linuxrc on initrd doesn't
exit. We want initrd mounted, /linuxrc launched and /linuxrc
will mount whatever it wants, maybe do pivot_root and exec init
itself. Task with PID 1 (parent of linuxrc) will sit there reaping
zombies, never leaving the kernel mode.
3. initrd is there, ROOT_DEV is not ram0, /linuxrc on initrd does exit
and sets real-root-dev to 256 (1:0, aka. ram0). We want initrd
mounted, /linuxrc launched and we expect linuxrc to mount all stuff
we need, maybe do pivot root and exit. Parent of /linuxrc (PID 1)
will proceed to exec init once /linuxrc is done.
4. initrd is there, ROOT_DEV is not ram0, /linuxrc on initrd might have
done something or not, but when it exits real-root-dev is not ram0.
We want initrd mounted, /linuxrc launched and when it exits we are
going to mount final root according to real-root-dev. If there is
/initrd on the final root, initrd will be moved there. Otherwise
initrd will be unmounted and its memory (if possible) freed. Then
we exec init from final root.
Note that we want the parent of linuxrc chrooted to initrd while linuxrc
runs - otherwise things like request_module() will be rather unhappy. That
goes for all variants that run linuxrc.
Scenarios above go in order of increasing complexity. Let's start with #4:
we had loaded initrd
we mount initrd on /root
we open / and /old (on initrd)
chdir /root
mount -- move . /
chroot .
Now we have initrd mounted on /, we are chrooted into it but keep opened
descriptors of / and /old, so we'll be able to break out of jail later.
we fork a child that will be linuxrc
child closes opened descriptors, opens /dev/console, dups it to stdout
and stderr, does setsid and execs /linuxrc.
parent sits there reaping zombies until child is finished.
Note that both parent and linuxrc are chrooted into /initrd and if linuxrc
calls pivot_root, the parent will also have its root/cwd switched.
OK, child is finished and after checking real_root_dev we see that
it's not MKDEV(1,0). Now we know that it's scenario #4.
We break out of jail, doing the following:
fchdir to /old on rootfs
mount --move / .
fchdir to / on rootfs
chroot to .
That will move initrd to /old and leave us with root and cwd in / of rootfs.
We can close these two descriptors now - they'd done their job.
We mount final root to /root
We attempt to mount -- move /old /root/initrd; if we are successful -
we chdir to /root, mount --move . / and chroot to . That will leave us with
* final root on /
* initrd on /initrd of final root
* cwd and root on final root.
At that point we simply exec init.
Now, if mount --move had failed, we got to clean up the mess. We
unmount (with MNT_DETACH) initrd from /old and do BLKFLSBUF on ram0. After
that we have final root on /root, initrd maybe still alive, but not mounted
anywhere and our root/cwd in / of rootfs. Again,
chdir /root
mount --move . /
chroot to .
and we have final root mounted on /, we are chrooted into it and it's time
for exec init.
That's it for scenario 4. The rest will be simpler - there's less
work to do.
#3 diverges from #4 after linuxrc had finished and we had already broken out
of jail. Whatever we got from linuxrc is mounted on /old now, so we move it
back to /, get chrooted there and exec init. We could've left earlier
(skipping the move to /old and move back parts), but that would lead to
even messier logics in prepare_namespace() ;-/
#2 means that parent of /linuxrc never gets past waiting its child to finish.
End of story.
#1 is the simplest variant - it mounts final root on /root and then does usual
"chdir there, mount --move . /, chroot to ." and execs init.
Relevant code is in prepare_namespace()/handle_initrd() and yes, it's messy.
Had been even worse... ;-/
<mingo@elte.hu>
[PATCH] CLONE_DETACHED fix
This avoids a crash that can be caused by a CLONE_DETACHED thread.
<torvalds@home.transmeta.com>
Linux 2.5.34
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