| commit | fbbf055692aeb25c54c49d9ca84532de836fbba0 | |
| author | Christoph Hellwig <hch@lst.de> | |
| Thu, 17 Jun 2010 07:54:32 +0000 (17 09:54 +0200) | ||
| committer | Jens Axboe <jaxboe@fusionio.com> | |
| Thu, 17 Jun 2010 08:10:53 +0000 (17 10:10 +0200) | ||
| tree | df058ee803db2b5c8362fd2f2e8f60eacbd9138a | treesnapshot (tar.gz zip) |
| parent | 79600aadcf35dd31ec284928cf45296fea98db61 | commitdiff |
block: fix DISCARD_BARRIER requests
Filesystems assume that DISCARD_BARRIER are full barriers, so that they
don't have to track in-progress discard operation when submitting new I/O.
But currently we only treat them as elevator barriers, which don't
actually do the nessecary queue drains.
Also remove the unlikely around both the DISCARD and BARRIER requests -
the happen far too often for a static mispredict.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Filesystems assume that DISCARD_BARRIER are full barriers, so that they
don't have to track in-progress discard operation when submitting new I/O.
But currently we only treat them as elevator barriers, which don't
actually do the nessecary queue drains.
Also remove the unlikely around both the DISCARD and BARRIER requests -
the happen far too often for a static mispredict.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
| block/blk-core.c | diffblobblamehistory |