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Date: Thu, 31 Jul 2014 09:13:50 -0700 From: Tim Chen <tim.c.chen@...ux.intel.com> To: Christoph Hellwig <hch@...radead.org> Cc: Al Viro <viro@...iv.linux.org.uk>, suruchi <suruchi.a.kadu@...el.com>, ak <ak@...ux.intel.com>, Dave Hansen <dave.hansen@...el.com>, Matthew Wilcox <willy@...ux.intel.com>, "hubert.nueckel" <hubert.nueckel@...el.com>, beth.marsh-prime@...el.com, "doug.nelson" <doug.nelson@...el.com>, linux-kernel <linux-kernel@...r.kernel.org>, linux-fsdevel <linux-fsdevel@...r.kernel.org>, Linus Torvalds <torvalds@...ux-foundation.org> Subject: Re: [Regression 3.16-rc kernel] -55% reduction in throughput for OLTP benchmark On Tue, 2014-07-29 at 17:12 -0700, Christoph Hellwig wrote: > On Tue, Jul 29, 2014 at 04:57:12PM -0700, Tim Chen wrote: > > Christoph, we're glad to report that this patch does fix the problem. > > Wonder if Al or someone can pick it up. It is a large regression > > that should not be left unfixed for 3.16. > > Al has been away for a bit, and I prepared the last VFS pull. I'll pick > it up for now and either Al or I will send it on before next weekend. > > Can I get a tested-by tag from you for the patch? Can anyone else > please cross check it? The new total value might be different from > the old size value when we do a short write, but I can't see how > an async write would be a good thing if we had to finish the remainder > using buffered I/O if the old code really allowed that. > Yes, please put in Tested-by: Tim Chen <tim.c.chen@...ux.intel.com> Tested-by: Suruchi Kadu <suruchi.a.kadu@...el.com> Tim -- 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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