tree a883a748374d5f63bf030dcf445723a901f88357
parent 5825294edd3364cbba6514f70d88debec4f6cec7
author Dave Chinner <david@fromorbit.com> 1239036447 +0200
committer Christoph Hellwig <hch@brick.lst.de> 1239036447 +0200

xfs: block callers of xfs_flush_inodes() correctly

xfs_flush_inodes() currently uses a magic timeout to wait for
some inodes to be flushed before returning. This isn't
really reliable but used to be the best that could be done
due to deadlock potential of waiting for the entire flush.

Now the inode flush is safe to execute while we hold page
and inode locks, we can wait for all the inodes to flush
synchronously. Convert the wait mechanism to a completion
to do this efficiently. This should remove all remaining
spurious ENOSPC errors from the delayed allocation reservation
path.

This is extracted almost line for line from a larger patch
from Mikulas Patocka.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>