Messages in this thread | | | Date | Tue, 12 May 2015 16:55:36 +0800 | Subject | Re: [PATCH v3 3/4] block: loop: use kthread_work | From | Ming Lei <> |
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On Tue, May 12, 2015 at 3:25 PM, Christoph Hellwig <hch@infradead.org> wrote: > On Mon, May 11, 2015 at 09:12:56PM +0800, Ming Lei wrote: >> For non-AIO case, single thread has been used for long long time, >> and it was just converted to work in v4.0, which has caused performance >> regression for fedora live booting already. In discussion[1], even though >> submitting I/O via work concurrently can improve random IO throughput, >> meantime it may hurt sequential IO performance, so maybe better to restore >> to single thread behaviour. > > Then justify the change based on the non-aio use case and document that > in the changelog.
OK, will add that in v4.
Thanks, Ming
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