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Message-ID: <20100802161001.GF32757@khazad-dum.debian.net> Date: Mon, 2 Aug 2010 13:10:01 -0300 From: Henrique de Moraes Holschuh <hmh@....eng.br> To: Kay Diederichs <Kay.Diederichs@...-konstanz.de> Cc: Greg Freemyer <greg.freemyer@...il.com>, linux <linux-kernel@...r.kernel.org>, Ext4 Developers List <linux-ext4@...r.kernel.org>, Karsten Schaefer <karsten.schaefer@...-konstanz.de> Subject: Re: ext4 performance regression 2.6.27-stable versus 2.6.32 and later On Mon, 02 Aug 2010, Henrique de Moraes Holschuh wrote: > On Mon, 02 Aug 2010, Kay Diederichs wrote: > > Performance-wise, we tried mounting with barrier versus nobarrier (or > > barrier=1 versus barrier=0) and re-did the 2.6.32+ benchmarks. It turned > > out that the benchmark difference with and without barrier is less than > > the variation between runs (which is much higher with 2.6.32+ than with > > 2.6.27-stable), so the influence seems to be minor. > > Did you check interactions with the IO scheduler? Never mind, I reread your first message, and you did. I apologise for the noise. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- 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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