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17 May 2024, 09:02:56 UTC
Revision 0af32fb468b4a4434dd759d68611763658650b59 authored by Christoph Hellwig on 16 August 2016, 22:30:28 UTC, committed by Dave Chinner on 16 August 2016, 22:30:28 UTC 
xfs: fix bogus space reservation in xfs_iomap_write_allocate
 
The space reservations was without an explaination in commit

    "Add error reporting calls in error paths that return EFSCORRUPTED"

back in 2003.  There is no reason to reserve disk blocks in the
transaction when allocating blocks for delalloc space as we already
reserved the space when creating the delalloc extent.

With this fix we stop running out of the reserved pool in
generic/229, which has happened for long time with small blocksize
file systems, and has increased in severity with the new buffered
write path.

[ dchinner: we still need to pass the block reservation into
  xfs_bmapi_write() to ensure we don't deadlock during AG selection.
  See commit dbd5c8c ("xfs: pass total block res. as total
  xfs_bmapi_write() parameter") for more details on why this is
  necessary. ]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
1 parent 4dd3fd7
History
Tip revision: 0af32fb468b4a4434dd759d68611763658650b59 authored by Christoph Hellwig on 16 August 2016, 22:30:28 UTC
xfs: fix bogus space reservation in xfs_iomap_write_allocate
Tip revision: 0af32fb
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