Andrew Morton wrote:
Please see http://bugzilla.kernel.org/show_bug.cgi?id=8636
In that report a pretty large slowdown with CFQ has been identified.
Jens has plunked a patch in there (Comment #50) and then ran away on
vacation.
If someone can test that patch and demonstrate its goodness, I'll
queue it up, thanks.
This has unfortunately split up into two threads. I identified the root
cause of the slowdown as NCQ in the thread "Re: SATA RAID5 speed drop of
100 MB/s" on LKML.
Jeff
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