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Message-Id: <1227649893.6557.10.camel@oldsmobile> Date: Tue, 25 Nov 2008 22:51:33 +0100 From: Stian Jordet <liste@...det.net> To: Eric Sandeen <sandeen@...deen.net> Cc: Stian Jordet <liste@...det.net>, Sven-Haegar Koch <haegar@...net.de>, xfs@....sgi.com, linux-kernel@...r.kernel.org Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc] ti., 25.11.2008 kl. 15.22 -0600, skrev Eric Sandeen: > Depending on the old system, perhaps its storage did not allow the > barriers to be honored, so after xfs saw a test barrier write fail at > mount time, it disabled them ... you'd see a message if that were the > case, FWIW. I know those messages, I get them on my old server. But my old workstation did not disable the barrier... But I still don't understand this. On my laptop (HP EliteBook 8530w, very very powerful, but still a laptop, not an eight core, hardware raid workstation...), I get this (xfs partition): barrier: time bash -c 'tar xjf linux-2.6.27.7.tar.bz2; sync' real 1m30.855s user 0m23.265s sys 0m4.096s nobarrier: time bash -c 'tar xjf linux-2.6.27.7.tar.bz2; sync' real 0m37.602s user 0m15.281s sys 0m4.184s With no barriers, it's 22s faster than my workstation. That can't be the way it's supposed to be? -Stian -- 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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