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Date: Thu, 21 Aug 2014 06:03:15 -0700 From: Christoph Hellwig <hch@...radead.org> To: Sagi Grimberg <sagig@....mellanox.co.il> Cc: Christoph Hellwig <hch@...radead.org>, James Bottomley <James.Bottomley@...senPartnership.com>, Jens Axboe <axboe@...nel.dk>, Bart Van Assche <bvanassche@...ionio.com>, Robert Elliott <Elliott@...com>, linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org, viro@...IV.linux.org.uk, Or Gerlitz <ogerlitz@...lanox.com>, Oren Duer <oren@...lanox.com>, "Nicholas A. Bellinger" <nab@...ux-iscsi.org>, Mike Christie <michaelc@...wisc.edu>, linux-fsdevel@...r.kernel.org, Max Gurtovoy <maxg@...lanox.com> Subject: Re: Performance degradation in IO writes vs. reads (was scsi-mq V2) On Thu, Aug 21, 2014 at 03:32:09PM +0300, Sagi Grimberg wrote: > So I just got back to checking this issue of *extremely low* IO write > performance I got in 3.16-rc2. Please test with 3.16 final. There once issue each in aio and dio that caused bad I/O performance regression that were only fixed last minute in the 3.16 cycle. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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