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| author | NeilBrown <neilb@suse.de> | 2012-09-19 12:48:30 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2012-09-19 12:48:30 +1000 |
| commit | a852d7b8a0cf29499905c9243fa6d3fb93898b82 (patch) | |
| tree | 006200722d6313f3ed8680c2fee6bd8d66a9de91 /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py | |
| parent | 55d512e245bc7699a8800e23df1a24195dd08217 (diff) | |
Revert "md/raid5: For odirect-write performance, do not set STRIPE_PREREAD_ACTIVE."
This reverts commit 895e3c5c58a80bb9e4e05d9ac38b4f30e0f97d80.
While this patch seemed like a good idea and did help some workloads,
it hurts other workloads.
Large sequential O_DIRECT writes were faster,
Small random O_DIRECT writes were slower.
Other changes (batching RAID5 writes) have improved the sequential
writes using a different mechanism, so the net result of this patch
is definitely negative. So revert it.
Reported-by: Shaohua Li <shli@kernel.org>
Tested-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py')
0 files changed, 0 insertions, 0 deletions