Messages in this thread |  | | | Date | Sat, 23 Jul 2011 20:38:20 +0200 | | From | Jens Axboe <> | | Subject | Re: [RFC PATCH 1/2] block: strict rq_affinity |
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On 2011-07-23 03:46, Christoph Hellwig wrote: > On Fri, Jul 22, 2011 at 01:59:39PM -0700, Dan Williams wrote: >> Some storage controllers benefit from completions always being steered >> to the strict requester cpu rather than the looser "per-socket" steering >> that blk_cpu_to_group() attempts by default. > > Isn't this actually dependent on the cpu, and not the storage > controller?
It is, it's completely indendent of the controller used. Perhaps some drivers could have a very heavy end io completion handling causing the problem to become larger, but in general it's an artifact of the CPU and not the controller.
-- Jens Axboe
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