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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-07-23 01:17:00 +0400 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-08-07 20:52:53 +0400 |
| commit | 4dab46ff26c6003a13ec769312c50938b93c359d (patch) | |
| tree | 02d6f99222034dfeb73ccb388663570db883cb52 /tools/perf/scripts/python/syscall-counts-by-pid.py | |
| parent | e96f6abe02fc3320d669985443e8c68ff8e83294 (diff) | |
| download | linux-4dab46ff26c6003a13ec769312c50938b93c359d.tar.xz | |
xen/blkfront: use tagged queuing for barriers
When barriers are supported, then use QUEUE_ORDERED_TAG to tell the block
subsystem that it doesn't need to do anything else with the barriers.
Previously we used ORDERED_DRAIN which caused the block subsystem to
drain all pending IO before submitting the barrier, which would be
very expensive.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts-by-pid.py')
0 files changed, 0 insertions, 0 deletions