12 Jan, 2010
30 commits
-
Remove comments about function short descriptions not allowed to be on
multiple lines (that was fixed/changed recently).Add comments that function "section header:" names need to be unique per
function/struct/union/typedef/enum.Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Michael Hennerich
Signed-off-by: Mike Frysinger
Cc: Jean Delvare
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
menu: use proper 64 bit math
The new menu governor is incorrectly doing a 64 bit divide. Compile
tested onlySigned-off-by: Stephen Hemminger
Cc: Arjan van de Ven
Cc: Len Brown
Cc: Venkatesh Pallipadi
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix typos, grammos, spellos, hyphenation.
Signed-off-by: Randy Dunlap
Acked-by: Steven Rostedt
Cc: Mel Gorman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sz is in bytes, MAX_ORDER_NR_PAGES is in pages.
Signed-off-by: Andrea Arcangeli
Acked-by: David Gibson
Cc: Mel Gorman
Cc: David Rientjes
Cc: Lee Schermerhorn
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by:
Cc: Jean Delvare
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Previously enabled poll(2) support on one edge was never reconfigured when
sysfs polarity change was triggered from kernel, because 'struct device
*dev' shadowed an earlier definition.Found by sparse, which I should've run much earlier.
Signed-off-by: Jani Nikula
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Uwe Kleine-König
Reported-by: Josip Rodin
Cc: Joe Perches
Cc: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
JEDEC eMMC specification version 4.4 (MMCA 4.4) defines Extended CSD
structure versions up to 5.Signed-off-by: Adrian Hunter
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The main bug was that 'blk_cleanup_queue()' was called while the block
device could still be in use, for example, because the card was removed
while files were still open.In addition, to be sure that 'mmc_request()' will get called for all new
requests (so it can error them out), the queue is emptied during cleanup.
This is done after the worker thread is stopped to avoid racing with it.Finally, it is not a device error for this to be happening, so quiet the
(sometimes very many) error messages.Signed-off-by: Adrian Hunter
Cc:
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If mmc_blk_set_blksize() fails mmc_blk_probe() the request queue and its
thread have been set up and they need to be shut down properly before
putting the disk.Signed-off-by: Jarkko Lavinen
Signed-off-by: Adrian Hunter
Cc:
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When a card is removed before mmc_blk_probe() has called add_disk(), then
the minor field is uninitialized and has value 0. This caused
mmc_blk_put() to always release devidx 0 even if 0 was still in use. Then
the next mmc_blk_probe() used the first free idx of 0, which oopses in
sysfs, since it is used by another card.Signed-off-by: Anna Lemehova
Signed-off-by: Adrian Hunter
Cc:
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Warning(drivers/base/power/main.c:453): No description found for parameter 'dev'
Warning(drivers/base/power/main.c:453): No description found for parameter 'cb'
Warning(drivers/base/power/main.c:719): No description found for parameter 'dev'
Warning(drivers/base/power/main.c:719): No description found for parameter 'state'
Warning(drivers/base/power/main.c:719): No description found for parameter 'cb'Signed-off-by: Randy Dunlap
Cc: Rafael J. Wysocki
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit d899bf7b (procfs: provide stack information for threads) introduced
to show stack information in /proc/{pid}/status. But it cause large
performance regression. Unfortunately /proc/{pid}/status is used ps
command too and ps is one of most important component. Because both to
take mmap_sem and page table walk are heavily operation.If many process run, the ps performance is,
[before d899bf7b]
% perf stat ps >/dev/null
Performance counter stats for 'ps':
4090.435806 task-clock-msecs # 0.032 CPUs
229 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
234 page-faults # 0.000 M/sec
8587565207 cycles # 2099.425 M/sec
9866662403 instructions # 1.149 IPC
3789415411 cache-references # 926.409 M/sec
30419509 cache-misses # 7.437 M/sec128.859521955 seconds time elapsed
[after d899bf7b]
% perf stat ps > /dev/null
Performance counter stats for 'ps':
4305.081146 task-clock-msecs # 0.028 CPUs
480 context-switches # 0.000 M/sec
2 CPU-migrations # 0.000 M/sec
237 page-faults # 0.000 M/sec
9021211334 cycles # 2095.480 M/sec
10605887536 instructions # 1.176 IPC
3612650999 cache-references # 839.160 M/sec
23917502 cache-misses # 5.556 M/sec152.277819582 seconds time elapsed
Thus, this patch revert it. Fortunately /proc/{pid}/task/{tid}/smaps
provide almost same information. we can use it.Commit d899bf7b introduced two features:
1) Add the annotattion of [thread stack: xxxx] mark to
/proc/{pid}/task/{tid}/maps.
2) Add StackUsage field to /proc/{pid}/status.I only revert (2), because I haven't seen (1) cause regression.
Signed-off-by: KOSAKI Motohiro
Cc: Stefani Seibold
Cc: Ingo Molnar
Cc: Peter Zijlstra
Cc: Alexey Dobriyan
Cc: "Eric W. Biederman"
Cc: Randy Dunlap
Cc: Andrew Morton
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
MIPS compressed kernels output a vmlinuz file in the top-level directory
(maybe others do). Add vmlinuz to the list of files to ignore by git.Signed-off-by: Florian Fainelli
Cc: Ralf Baechle
Cc: Maxime Bizon
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When print-fatal-signals is enabled it's possible to dump any memory
reachable by the kernel to the log by simply jumping to that address from
user space.Or crash the system if there's some hardware with read side effects.
The fatal signals handler will dump 16 bytes at the execution address,
which is fully controlled by ring 3.In addition when something jumps to a unmapped address there will be up to
16 additional useless page faults, which might be potentially slow (and at
least is not very efficient)Fortunately this option is off by default and only there on i386.
But fix it by checking for kernel addresses and also stopping when there's
a page fault.Signed-off-by: Andi Kleen
Cc: Ingo Molnar
Cc: Oleg Nesterov
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The LTP cgroup test suite generates a "kernel BUG at kernel/cgroup.c:790!"
here in cgroup_diput():/*
* if we're getting rid of the cgroup, refcount should ensure
* that there are no pidlists left.
*/
BUG_ON(!list_empty(&cgrp->pidlists));The cgroup pidlist rework in 2.6.32 generates the BUG_ON, which is caused
when pidlist_array_load() calls cgroup_pidlist_find():(1) if a matching cgroup_pidlist is found, it down_write's the mutex of the
pre-existing cgroup_pidlist, and increments its use_count.
(2) if no matching cgroup_pidlist is found, then a new one is allocated, it
down_write's its mutex, and the use_count is set to 0.
(3) the matching, or new, cgroup_pidlist gets returned back to pidlist_array_load(),
which increments its use_count -- regardless whether new or pre-existing --
and up_write's the mutex.So if a matching list is ever encountered by cgroup_pidlist_find() during
the life of a cgroup directory, it results in an inflated use_count value,
preventing it from ever getting released by cgroup_release_pid_array().
Then if the directory is subsequently removed, cgroup_diput() hits the
BUG_ON() when it finds that the directory's cgroup is still populated with
a pidlist.The patch simply removes the use_count increment when a matching pidlist
is found by cgroup_pidlist_find(), because it gets bumped by the calling
pidlist_array_load() function while still protected by the list's mutex.Signed-off-by: Dave Anderson
Reviewed-by: Li Zefan
Acked-by: Ben Blum
Cc: Paul Menage
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The following command doesn't generate any output.
`./scripts/get_maintainer.pl --no-git -f drivers/net/wireless/wl12xx/wl1271_acx.c`An excluded "X:" pattern match in any section would cause a file not to
match any other section.Signed-off-by: Joe Perches
Reported-by: Dan Carpenter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
lib/rational.c:62: warning: data definition has no type or storage class
lib/rational.c:62: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL'
lib/rational.c:62: warning: parameter names (without types) in function declarationSigned-off-by: Sascha Hauer
Signed-off-by: Uwe Kleine-König
Acked-by: WANG Cong
Cc: Oskar Schirmer
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Albin Tonnerre
Tested-by: Wu Zhangjin
Acked-by: "H. Peter Anvin"
Cc: Ingo Molnar
Cc: Thomas Gleixner
Tested-by: Russell King
Acked-by: Russell King
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The necessary changes to the x86 Kconfig and boot/compressed to allow the
use of this new compression methodSigned-off-by: Albin Tonnerre
Acked-by: H. Peter Anvin
Tested-by: Wu Zhangjin
Cc: Ingo Molnar
Cc: Thomas Gleixner
Tested-by: Russell King
Acked-by: Russell King
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- changes to ach/arch/boot/Makefile to make it easier to add new
compression types
- new piggy.lzo.S necessary for lzo compression
- changes in arch/arm/boot/compressed/misc.c to allow the use of lzo or
gzip, depending on the config
- Kconfig supportSigned-off-by: Albin Tonnerre
Tested-by: Wu Zhangjin
Acked-by: "H. Peter Anvin"
Cc: Ingo Molnar
Cc: Thomas Gleixner
Tested-by: Russell King
Acked-by: Russell King
Cc: Ralf Baechle
Cc: Martin Michlmayr
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch series adds generic support for creating and extracting
LZO-compressed kernel images, as well as support for using such images on
the x86 and ARM architectures, and support for creating and using
LZO-compressed initrd and initramfs images.Russell King said:
: Testing on a Cortex A9 model:
: - lzo decompressor is 65% of the time gzip takes to decompress a kernel
: - lzo kernel is 9% larger than a gzip kernel
:
: which I'm happy to say confirms your figures when comparing the two.
:
: However, when comparing your new gzip code to the old gzip code:
: - new is 99% of the size of the old code
: - new takes 42% of the time to decompress than the old code
:
: What this means is that for a proper comparison, the results get even better:
: - lzo is 7.5% larger than the old gzip'd kernel image
: - lzo takes 28% of the time that the old gzip code took
:
: So the expense seems definitely worth the effort. The only reason I
: can think of ever using gzip would be if you needed the additional
: compression (eg, because you have limited flash to store the image.)
:
: I would argue that the default for ARM should therefore be LZO.This patch:
The lzo compressor is worse than gzip at compression, but faster at
extraction. Here are some figures for an ARM board I'm working on:Uncompressed size: 3.24Mo
gzip 1.61Mo 0.72s
lzo 1.75Mo 0.48sSo for a compression ratio that is still relatively close to gzip, it's
much faster to extract, at least in that case.This part contains:
- Makefile routine to support lzo compression
- Fixes to the existing lzo compressor so that it can be used in
compressed kernels
- wrapper around the existing lzo1x_decompress, as it only extracts one
block at a time, while we need to extract a whole file here
- config dialog for kernel compression[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: cleanup]
Signed-off-by: Albin Tonnerre
Tested-by: Wu Zhangjin
Acked-by: "H. Peter Anvin"
Cc: Ingo Molnar
Cc: Thomas Gleixner
Tested-by: Russell King
Acked-by: Russell King
Cc: Ralf Baechle
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
JFFS2 uses lesser compression ratio and inflate always ends up in "copy
direct from output" case.This patch tries to optimize the direct copy procedure. Uses
get_unaligned() but only in one place.The copy loop just above this one can also use this optimization, but I
havn't done so as I have not tested if it is a win there too.On my MPC8321 this is about 17% faster on my JFFS2 root FS than the
original.[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Joakim Tjernlund
Cc: Roel Kluin
Cc: Richard Purdie
Cc: David Woodhouse
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
__pcpu_ptr_to_addr() can be overridden by the architecture and might not
behave well if passed a NULL pointer. So avoid calling it until we have
verified that its arg is not NULL.Cc: Rusty Russell
Cc: Kamalesh Babulal
Acked-by: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix resource (write-pipe file) leak in call_usermodehelper_pipe().
When call_usermodehelper_exec() fails, write-pipe file is opened and
call_usermodehelper_pipe() just returns an error. Since it is hard for
caller to determine whether the error occured when opening the pipe or
executing the helper, the caller cannot close the pipe by themselves.I've found this resoruce leak when testing coredump. You can check how
the resource leaks as below;$ echo "|nocommand" > /proc/sys/kernel/core_pattern
$ ulimit -c unlimited
$ while [ 1 ]; do ./segv; done &> /dev/null &
$ cat /proc/meminfo (
Cc: Rusty Russell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There is no need to perform full BIDIR sync (copying the buffers in case
of swiotlb and similar schemes) if we know that the owner (CPU or device)
hasn't altered the data.Addresses the false-positive reported at
http://bugzilla.kernel.org/show_bug.cgi?id=14169Signed-off-by: Krzysztof Halasa
Cc: David Miller
Cc: Joerg Roedel
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It turns out that even zero-sized struct members (int foo[0];) will affect
the struct layout, causing us in particular to lose 4 bytes in struct
sock.This patch fixes the regression in CONFIG_KMEMCHECK=n case.
Reported-by: Eric Dumazet
Signed-off-by: Vegard Nossum
Acked-by: Pekka Enberg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add many ioctl definitions to ioctl-number.txt.
Fix some whitespace/formatting.
Correct some filenames/paths.Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Makes it consistent with the extern declaration, used when CONFIG_HIGHMEM
is set Removes redundant casts in printout messagesSigned-off-by: Andreas Fenkart
Acked-by: Russell King
Cc: Ralf Baechle
Cc: David Howells
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Chen Liqin
Cc: Lennox Wu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Jan, 2010
10 commits
-
Commit cbda12d77ea590082edb6d30bd342a67ebc459e0 (drm/i915: implement
new pm ops for i915), among other things, removed the .suspend and
.resume pointers from the struct drm_driver object in i915_drv.c,
which broke resume without KMS on my MSI Wind U100.Fix this by reverting that part of commit cbda12d77ea59.
[ The DRM layer will not use the class-specific suspend/resume functions
if the driver is marked MODESET-aware, and conversely it will not
register the PCI device if the drievr isn't so marked, so you always
end up with _either_ the drm-class suspend/resume _or_ the PCI layer
PM functionality, never both. - Linus ]Signed-off-by: Rafael J. Wysocki
Acked-by: Jesse Barnes
Signed-off-by: Linus Torvalds -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
IB/addr: Correct CONFIG_IPv6 to CONFIG_IPV6
mlx4_core: Fix cleanup in __mlx4_init_one() error path
IB/mlx4: Fix queue overflow check in post_recv
IB/mlx4: Initialize SRQ scatter entries when creating an SRQ -
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
kgdb: Fix kernel-doc format error in kgdb.h
blackfin,kgdb: Do not put PC in gdb_regs into retx.
blackfin,kgdb,probe_kernel: Cleanup probe_kernel_read/write
maccess,probe_kernel: Allow arch specific override probe_kernel_(read|write) -
…t/frederic/random-tracing
* 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing:
reiserfs: Relax reiserfs_xattr_set_handle() while acquiring xattr locks
reiserfs: Fix unreachable statement
reiserfs: Don't call reiserfs_get_acl() with the reiserfs lock
reiserfs: Relax lock on xattr removing
reiserfs: Relax the lock before truncating pages
reiserfs: Fix recursive lock on lchown
reiserfs: Fix mistake in down_write() conversion -
* 'for-linus' of git://oss.sgi.com/xfs/xfs:
xfs: kill some warnings on i386 builds -
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] move fnptr definition inside #ifdef __KERNEL__ -
* 'for-linus/samsung' of git://git.fluff.org/bjdooks/linux:
ARM: S3C64XX: Fix possible clock look in EPLL and MPLL clock chains -
…git/x86/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip:
x86, irq: Check move_in_progress before freeing the vector mapping
x86: copy_from_user() should not return -EFAULT
Revert "x86: Side-step lguest problem by only building cmpxchg8b_emu for pre-Pentium"
x86/pci: Intel ioh bus num reg accessing fix
x86: Fix size for ex trampoline with 32bit -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
PCIe AER: prevent AER injection if hardware masks error reporting
PCI/PM: Use per-device D3 delays
PCI: Check the node argument passed to cpumask_of_node
PCI: AER: fix aer inject result in kernel oops
PCI: pcie portdrv: style cleanup -
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
nfs: fix oops in nfs_rename()
sunrpc: fix build-time warning
sunrpc: on successful gss error pipe write, don't return error
SUNRPC: Fix the return value in gss_import_sec_context()
SUNRPC: Fix up an error return value in gss_import_sec_context_kerberos()
