linux-kernel - Re: Bad SSD performance with recent kernels

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Message-ID: <1327757611.7199.6.camel@edumazet-laptop>
Date:	Sat, 28 Jan 2012 14:33:31 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Wu Fengguang <wfg@...ux.intel.com>
Cc:	Herbert Poetzl <herbert@...hfloor.at>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>
Subject: Re: Bad SSD performance with recent kernels

Le samedi 28 janvier 2012 à 20:51 +0800, Wu Fengguang a écrit :

> Would you please create a filesystem and large file on sda and run the
> tests on the file? There was some performance bug on reading the raw
> /dev/sda device file..

Hmm... latest kernel has the performance bug right now.

Really if /dev/sda is slow, we are stuck.

FYI, I started a bisection.



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