[XFS] Block on unwritten extent conversion during synchronous direct I/O.

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Currently we do not wait on extent conversion to occur, and hence we can
return to userspace from a synchronous direct I/O write without having
completed all the actions in the write. Hence a read after the write may
see zeroes (unwritten extent) rather than the data that was written.

Block the I/O completion by triggering a synchronous workqueue flush to
ensure that the conversion has occurred before we return to userspace.

SGI-PV: 964092
SGI-Modid: xfs-linux-melb:xfs-kern:28775a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

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David Chinner 2007-06-05 16:24:36 +10:00 • committed by Tim Shimmin

parent f4a9f28a90

commit e927af90aa

1 changed files with 20 additions and 8 deletions

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fs/xfs/linux-2.6/xfs_aops.c

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