linux-stable.git/init/Kconfig, branch linux-2.6.32.y

slub: fix panic with DISCONTIGMEM

2011-05-09T22:54:51+00:00

commit 4a5fa3590f09999f6db41bc386bce40848fa9f63 upstream.

Slub makes assumptions about page_to_nid() which are violated by
DISCONTIGMEM and !NUMA.  This violation results in a panic because
page_to_nid() can be non-zero for pages in the discontiguous ranges and
this leads to a null return by get_node().  The assertion by the
maintainer is that DISCONTIGMEM should only be allowed when NUMA is also
defined.  However, at least six architectures: alpha, ia64, m32r, m68k,
mips, parisc violate this.  The panic is a regression against slab, so
just mark slub broken in the problem configuration to prevent users
reporting these panics.

Acked-by: David Rientjes 
Acked-by: Pekka Enberg 
Signed-off-by: James Bottomley 
Signed-off-by: Greg Kroah-Hartman

sched: Remove remaining USER_SCHED code

2011-02-17T23:37:19+00:00

Commit: 32bd7eb5a7f4596c8440dd9440322fe9e686634d upstream

This is left over from commit 7c9414385e ("sched: Remove USER_SCHED"")

Signed-off-by: Li Zefan 
Acked-by: Dhaval Giani 
Signed-off-by: Peter Zijlstra 
Cc: David Howells 
LKML-Reference: <4BA9A05F.7010407@cn.fujitsu.com>
Signed-off-by: Ingo Molnar 
Signed-off-by: Mike Galbraith 
Acked-by: Peter Zijlstra

sched: Remove USER_SCHED

2011-02-17T23:37:19+00:00

Commit: 7c9414385ebfdd87cc542d4e7e3bb0dbb2d3ce25 upstream

Remove the USER_SCHED feature. It has been scheduled to be removed in
2.6.34 as per http://marc.info/?l=linux-kernel&m=125728479022976&w=2

[trace from referenced thread]
[1046577.884289] general protection fault: 0000 [#1] SMP
[1046577.911332] last sysfs file: /sys/devices/platform/coretemp.7/temp1_input
[1046577.938715] CPU 3
[1046577.965814] Modules linked in: ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables coretemp k8temp
[1046577.994456] Pid: 38, comm: events/3 Not tainted 2.6.32.27intel #1 X8DT3
[1046578.023166] RIP: 0010:[] [] sched_destroy_group+0x3c/0x10d
[1046578.052639] RSP: 0000:ffff88043e5abe10 EFLAGS: 00010097
[1046578.081360] RAX: ffff880139fa5540 RBX: ffff8803d18419c0 RCX: ffff8801d2f8fb78
[1046578.109903] RDX: dead000000200200 RSI: 0000000000000000 RDI: 0000000000000000
[1046578.109905] RBP: 0000000000000246 R08: 0000000000000020 R09: ffffffff816339b8
[1046578.109907] R10: 0000000004e6e5f0 R11: 0000000000000006 R12: ffffffff816339b8
[1046578.109909] R13: ffff8803d63ac4e0 R14: ffff88043e582340 R15: ffffffff8104a216
[1046578.109911] FS: 0000000000000000(0000) GS:ffff880028260000(0000) knlGS:0000000000000000
[1046578.109914] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[1046578.109915] CR2: 00007f55ab220000 CR3: 00000001e5797000 CR4: 00000000000006e0
[1046578.109917] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[1046578.109919] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[1046578.109922] Process events/3 (pid: 38, threadinfo ffff88043e5aa000, task ffff88043e582340)
[1046578.109923] Stack:
[1046578.109924] ffff8803d63ac498 ffff8803d63ac4d8 ffff8803d63ac440 ffffffff8104a2c3
[1046578.109927] <0> ffff88043e5abef8 ffff880028276040 ffff8803d63ac4d8 ffffffff81050395
[1046578.109929] <0> ffff88043e582340 ffff88043e5826c8 ffff88043e582340 ffff88043e5abfd8
[1046578.109932] Call Trace:
[1046578.109938] [] ? cleanup_user_struct+0xad/0xcc
[1046578.109942] [] ? worker_thread+0x148/0x1d4
[1046578.109946] [] ? autoremove_wake_function+0x0/0x2e
[1046578.109948] [] ? worker_thread+0x0/0x1d4
[1046578.109951] [] ? kthread+0x79/0x81
[1046578.109955] [] ? child_rip+0xa/0x20
[1046578.109957] [] ? kthread+0x0/0x81
[1046578.109959] [] ? child_rip+0x0/0x20
[1046578.109961] Code: 3c 00 4c 8b 25 02 98 3d 00 48 89 c5 83 cf ff eb 5c 48 8b 43 10 48 63 f7 48 8b 04 f0 48 8b 90 80 00 00 00 48 8b 48 78 48 89 51 08 <48> 89 0a 48 b9 00 02 20 00 00 00 ad de 48 89 88 80 00 00 00 48
[1046578.109975] RIP [] sched_destroy_group+0x3c/0x10d
[1046578.109979] RSP
[1046578.109981] ---[ end trace 5ebc2944b7872d4a ]---

Signed-off-by: Dhaval Giani 
Signed-off-by: Peter Zijlstra 
LKML-Reference: <1263990378.24844.3.camel@localhost>
LKML-Reference: http://marc.info/?l=linux-kernel&m=129466345327931
Signed-off-by: Ingo Molnar 
Signed-off-by: Mike Galbraith 
Acked-by: Peter Zijlstra

sysfs: fix SYSFS_DEPRECATED_V2 prompt

2009-12-02T00:32:20+00:00

The SYSFS_DEPRECATED_V2 says "remove" older, deprecated features, but it
actually enables them, so correct this confusing, backwards text.

Signed-off-by: Randy Dunlap 
Cc: Kay Sievers 
Cc: Greg KH 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

SLOW_WORK: Move slow_work's proc file to debugfs

2009-12-01T16:20:31+00:00

Move slow_work's debugging proc file to debugfs.

Signed-off-by: David Howells 
Requested-and-acked-by: Ingo Molnar 
Signed-off-by: Linus Torvalds

SLOW_WORK: Allow the work items to be viewed through a /proc file

2009-11-19T18:10:51+00:00

Allow the executing and queued work items to be viewed through a /proc file
for debugging purposes.  The contents look something like the following:

    THR PID   ITEM ADDR        FL MARK  DESC
    === ===== ================ == ===== ==========
      0  3005 ffff880023f52348  a 952ms FSC: OBJ17d3: LOOK
      1  3006 ffff880024e33668  2 160ms FSC: OBJ17e5 OP60d3b: Write1/Store fl=2
      2  3165 ffff8800296dd180  a 424ms FSC: OBJ17e4: LOOK
      3  4089 ffff8800262c8d78  a 212ms FSC: OBJ17ea: CRTN
      4  4090 ffff88002792bed8  2 388ms FSC: OBJ17e8 OP60d36: Write1/Store fl=2
      5  4092 ffff88002a0ef308  2 388ms FSC: OBJ17e7 OP60d2e: Write1/Store fl=2
      6  4094 ffff88002abaf4b8  2 132ms FSC: OBJ17e2 OP60d4e: Write1/Store fl=2
      7  4095 ffff88002bb188e0  a 388ms FSC: OBJ17e9: CRTN
    vsq     - ffff880023d99668  1 308ms FSC: OBJ17e0 OP60f91: Write1/EnQ fl=2
    vsq     - ffff8800295d1740  1 212ms FSC: OBJ16be OP4d4b6: Write1/EnQ fl=2
    vsq     - ffff880025ba3308  1 160ms FSC: OBJ179a OP58dec: Write1/EnQ fl=2
    vsq     - ffff880024ec83e0  1 160ms FSC: OBJ17ae OP599f2: Write1/EnQ fl=2
    vsq     - ffff880026618e00  1 160ms FSC: OBJ17e6 OP60d33: Write1/EnQ fl=2
    vsq     - ffff880025a2a4b8  1 132ms FSC: OBJ16a2 OP4d583: Write1/EnQ fl=2
    vsq     - ffff880023cbe6d8  9 212ms FSC: OBJ17eb: LOOK
    vsq     - ffff880024d37590  9 212ms FSC: OBJ17ec: LOOK
    vsq     - ffff880027746cb0  9 212ms FSC: OBJ17ed: LOOK
    vsq     - ffff880024d37ae8  9 212ms FSC: OBJ17ee: LOOK
    vsq     - ffff880024d37cb0  9 212ms FSC: OBJ17ef: LOOK
    vsq     - ffff880025036550  9 212ms FSC: OBJ17f0: LOOK
    vsq     - ffff8800250368e0  9 212ms FSC: OBJ17f1: LOOK
    vsq     - ffff880025036aa8  9 212ms FSC: OBJ17f2: LOOK

In the 'THR' column, executing items show the thread they're occupying and
queued threads indicate which queue they're on.  'PID' shows the process ID of
a slow-work thread that's executing something.  'FL' shows the work item flags.
'MARK' indicates how long since an item was queued or began executing.  Lastly,
the 'DESC' column permits the owner of an item to give some information.

Signed-off-by: David Howells

Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-11-11T19:29:34+00:00

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf tools: Fix permission checks
  perf_events: Fix some typo in the perf events config description

perf_events: Fix some typo in the perf events config description

2009-11-02T15:53:35+00:00

Signed-off-by: Thadeu Lima de Souza Cascardo 
Cc: trivial@kernel.org
LKML-Reference: <1256938346-8230-1-git-send-email-cascardo@holoscopio.com>
Signed-off-by: Ingo Molnar

powerpc: Minor cleanup to init/Kconfig

2009-10-27T05:42:41+00:00

We dont need to depend on PPC64 explicitly as all powerpc platforms
(32-bit and 64-bit) define PPC now.

Signed-off-by: Kumar Gala 
Signed-off-by: Benjamin Herrenschmidt

perf_event: Provide vmalloc() based mmap() backing

2009-10-06T12:21:50+00:00

Some architectures such as Sparc, ARM and MIPS (basically
everything with flush_dcache_page()) need to deal with dcache
aliases by carefully placing pages in both kernel and user maps.

These architectures typically have to use vmalloc_user() for this.

However, on other architectures, vmalloc() is not needed and has
the downsides of being more restricted and slower than regular
allocations.

Signed-off-by: Peter Zijlstra 
Acked-by: David Miller 
Cc: Andrew Morton 
Cc: Jens Axboe 
Cc: Paul Mackerras 
LKML-Reference: <1254830228.21044.272.camel@laptop>
Signed-off-by: Ingo Molnar