Messages in this thread | | | Date | Sat, 12 Oct 2013 08:52:27 +0800 | From | Shaohua Li <> | Subject | Re: [patch 1/4] percpu_ida: make percpu_ida percpu size/batch configurable |
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On Fri, Oct 11, 2013 at 01:31:52PM -0700, Kent Overstreet wrote: > On Fri, Oct 11, 2013 at 03:18:03PM +0800, Shaohua Li wrote: > > Make percpu_ida percpu size/batch configurable. The block-mq-tag will use it. > > Can you explain the justification for this? Performance...?
The performance using percpu_ida for tag management? Please see the patch 4 thread. If you ask the justification of making the size/batch configurable, the answer is we might have no enough tags, and default cache size/batch is too aggressive.
Thanks, Shaohua
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