25 Jan, 2008

1 commit

• 41ca28ab2   kref: add kref_set() ... Browse Code »

  This adds kref_set() to the kref api for future use by people who really
  know what they are doing with krefs...

  From: Evgeniy Polyakov
  Cc: Kay Sievers
  Signed-off-by: Greg Kroah-Hartman

  Evgeniy Polyakov

  2008-01-25 12:40:05 +0800  

28 Apr, 2007

1 commit

• 1b0b3b998   kref: fix CPU ordering with respect to krefs ... Browse Code »

  some atomic operations are only atomic, not ordered. Thus a CPU is allowed
  to reorder memory references to an object to before the reference is
  obtained. This fixes it.

  Signed-off-by: Oliver Neukum
  Signed-off-by: Greg Kroah-Hartman

  Oliver Neukum

  2007-04-28 01:57:29 +0800  

21 Dec, 2006

1 commit

• f334b60b4   kref refcnt and false positives ... Browse Code »

  With WARN_ON addition to kobject_init()
  [ http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.19/2.6.19-mm1/dont-use/broken-out/gregkh-driver-kobject-warn.patch ]

  I started seeing following WARNING on CPU offline followed by online on my
  x86_64 system.

  WARNING at lib/kobject.c:172 kobject_init()

  Call Trace:
  [] dump_trace+0xaa/0x3ef
  [] show_trace+0x3a/0x50
  [] dump_stack+0x15/0x17
  [] kobject_init+0x3f/0x8a
  [] kobject_register+0x1a/0x3e
  [] sysdev_register+0x5b/0xf9
  [] mce_create_device+0x77/0xf4
  [] mce_cpu_callback+0x3a/0xe5
  [] notifier_call_chain+0x26/0x3b
  [] raw_notifier_call_chain+0x9/0xb
  [] _cpu_up+0xb4/0xdc
  [] cpu_up+0x2b/0x42
  [] store_online+0x4a/0x72
  [] sysdev_store+0x24/0x26
  [] sysfs_write_file+0xcf/0xfc
  [] vfs_write+0xae/0x154
  [] sys_write+0x47/0x6f
  [] system_call+0x7e/0x83
  DWARF2 unwinder stuck at system_call+0x7e/0x83
  Leftover inexact backtrace:

  This is a false positive as mce.c is unregistering/registering sysfs
  interfaces cleanly on hotplug.

  kref_put() and conditional decrement of refcnt seems to be the root cause
  for this and the patch below resolves the issue for me.

  Signed-off-by: Venkatesh Pallipadi
  Signed-off-by: Andrew Morton
  Signed-off-by: Greg Kroah-Hartman

  Venkatesh Pallipadi

  2006-12-21 02:56:43 +0800  

21 Mar, 2006

1 commit

• 8b5536bbe   [PATCH] kref: avoid an atomic operation in kref_put() ... Browse Code »

  Avoid an atomic operation in kref_put() when the last reference is
  dropped. On most platforms, atomic_read() is a plan read of the counter
  and involves no atomic at all.

  Signed-off-by: Eric Dumazet
  Signed-off-by: Greg Kroah-Hartman

  Eric Dumazet

  2006-03-21 05:42:57 +0800  

17 Apr, 2005

1 commit

• 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

  Initial git repository build. I'm not bothering with the full history,
  even though we have it. We can create a separate "historical" git
  archive of that later if we want to, and in the meantime it's about
  3.2GB when imported into git - space that would just make the early
  git days unnecessarily complicated, when we don't have a lot of good
  infrastructure for it.

  Let it rip!

  Linus Torvalds

  2005-04-17 06:20:36 +0800