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  1. 23 9月, 2010 3 次提交
  3. 22 9月, 2010 6 次提交
  5. 20 9月, 2010 2 次提交
    • J
      nfsd4: fix hang on fast-booting nfs servers · 06497524
      由 J. Bruce Fields 提交于 
      The last_close field of a cache_detail is initialized to zero, so the
condition

	detail->last_close < seconds_since_boot() - 30

may be false even for a cache that was never opened.

However, we want to immediately fail upcalls to caches that were never
opened: in the case of the auth_unix_gid cache, especially, which may
never be opened by mountd (if the --manage-gids option is not set), we
want to fail the upcall immediately.  Otherwise client requests will be
dropped unnecessarily on reboot.

Also document these conditions.
Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
      06497524
    • J
      Merge remote branch 'trond/bugfixes' into for-2.6.37 · c88739b3
      由 J. Bruce Fields 提交于 
      Without some client-side fixes, server testing is currently difficult.
      c88739b3
  7. 13 9月, 2010 12 次提交
  9. 12 9月, 2010 6 次提交
  11. 11 9月, 2010 8 次提交
  13. 10 9月, 2010 3 次提交
    • D
      xfs: log IO completion workqueue is a high priority queue · 51749e47
      由 Dave Chinner 提交于 
      The workqueue implementation in 2.6.36-rcX has changed, resulting
in the workqueues no longer having dedicated threads for work
processing. This has caused severe livelocks under heavy parallel
create workloads because the log IO completions have been getting
held up behind metadata IO completions.  Hence log commits would
stall, memory allocation would stall because pages could not be
cleaned, and lock contention on the AIL during inode IO completion
processing was being seen to slow everything down even further.

By making the log Io completion workqueue a high priority workqueue,
they are queued ahead of all data/metadata IO completions and
processed before the data/metadata completions. Hence the log never
gets stalled, and operations needed to clean memory can continue as
quickly as possible. This avoids the livelock conditions and allos
the system to keep running under heavy load as per normal.
Signed-off-by: NDave Chinner <dchinner@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAlex Elder <aelder@sgi.com>
      51749e47
    • R
      execve: make responsive to SIGKILL with large arguments · 9aea5a65
      由 Roland McGrath 提交于 
      An execve with a very large total of argument/environment strings
can take a really long time in the execve system call.  It runs
uninterruptibly to count and copy all the strings.  This change
makes it abort the exec quickly if sent a SIGKILL.

Note that this is the conservative change, to interrupt only for
SIGKILL, by using fatal_signal_pending().  It would be perfectly
correct semantics to let any signal interrupt the string-copying in
execve, i.e. use signal_pending() instead of fatal_signal_pending().
We'll save that change for later, since it could have user-visible
consequences, such as having a timer set too quickly make it so that
an execve can never complete, though it always happened to work before.
Signed-off-by: NRoland McGrath <roland@redhat.com>
Reviewed-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      9aea5a65
    • R
      execve: improve interactivity with large arguments · 7993bc1f
      由 Roland McGrath 提交于 
      This adds a preemption point during the copying of the argument and
environment strings for execve, in copy_strings().  There is already
a preemption point in the count() loop, so this doesn't add any new
points in the abstract sense.

When the total argument+environment strings are very large, the time
spent copying them can be much more than a normal user time slice.
So this change improves the interactivity of the rest of the system
when one process is doing an execve with very large arguments.
Signed-off-by: NRoland McGrath <roland@redhat.com>
Reviewed-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      7993bc1f