Messages in this thread | | | Date | Fri, 2 May 2014 09:43:05 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH RFC 0/2] percpu_ida: Take into account CPU topology when stealing tags |
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On Fri, May 02, 2014 at 10:41:40AM -0600, Jens Axboe wrote: > > At least for SCSI devices _tag space_ is plenty, it's just the we > > artifically limit our tag space to the queue depth to avoid having to > > track that one separately. In addition we also preallocaste a request > > for each tag, so even if we would track the queue depth separately > > we would waste a lot of memory. > > In practice it comes out to the same, it's not feasible to run a much > larger space and track on queue depth. So I don't think that changes the > conclusion for SCSI.
Agreed. Just had to check if my smart ass hat still fits this morning..
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