tree b8a004167d57b577c5da563474f8eb32eff83393
parent dcfcf20512cb517ac18b9433b676183fa1257911
author Dave Chinner <dchinner@redhat.com> 1293065857 +1100
committer Dave Chinner <david@fromorbit.com> 1293065857 +1100

xfs: use KM_NOFS for allocations during attribute list operations

When listing attributes, we are doiing memory allocations under the
inode ilock using only KM_SLEEP. This allows memory allocation to
recurse back into the filesystem and do writeback, which may the
ilock we already hold on the current inode. THis will deadlock.
Hence use KM_NOFS for such allocations outside of transaction
context to ensure that reclaim recursion does not occur.

Reported-by: Nick Piggin <npiggin@gmail.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>