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(parent: b8a9ae7) | patch
Make DISCARD_BARRIER and DISCARD_NOBARRIER writes instead of reads
authorDavid Woodhouse <dwmw2@infradead.org>
Sat, 12 Sep 2009 05:35:37 +0000 (07:35 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Mon, 14 Sep 2009 06:24:53 +0000 (08:24 +0200)
commit3d2257f157c2324acbc0fa0fa54e8626a987edd2
treea3c05936cc4fbf49474dae072871dbab909c9ae4tree | snapshot (tar.gz zip)
parentb8a9ae779f2c7049071034661e09cb7e1e82250ccommit | diff
Make DISCARD_BARRIER and DISCARD_NOBARRIER writes instead of reads

The commands are conceptually writes, and in the case of IDE and SCSI
commands actually are writes.  They were only reads because we thought
that would interact better with the elevators.  Now the elevators know
about discard requests, that advantage no longer exists.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
include/linux/fs.h diff | blob | blame | history