| commit | 8807def737cea2b0d813b1f4cfbc1231feadfa92 | |
| author | Davide Libenzi <davidel@xmailserver.org> | |
| Fri, 11 Apr 2008 04:29:19 +0000 (10 21:29 -0700) | ||
| committer | Oliver Pinter <oliver.pntr@gmail.com> | |
| Mon, 14 Apr 2008 18:16:47 +0000 (14 20:16 +0200) | ||
| tree | 81f69f315e3838fb13b2fd1aba1477e5bfabf3ab | treesnapshot (tar.gz zip) |
| parent | 4c613a353e2811095cfc3de66be16c266c55ad82 | commitdiff |
eventfd/kaio integration fix
Jeff Roberson discovered a race when using kaio eventfd based notifications.
When it occurs it can lead tomissed wakeups and hung userspace.
This patch fixes the race by moving the notification inside the spinlocked
section of kaio. The operation is safe since eventfd spinlock and kaio one
are unrelated.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: Jeff Roberson <jroberson@chesapeake.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com>
Jeff Roberson discovered a race when using kaio eventfd based notifications.
When it occurs it can lead tomissed wakeups and hung userspace.
This patch fixes the race by moving the notification inside the spinlocked
section of kaio. The operation is safe since eventfd spinlock and kaio one
are unrelated.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: Jeff Roberson <jroberson@chesapeake.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com>
| fs/aio.c | diffblobblamehistory |