linux-kernel - Re: Excessive stall times on ext4 in 3.9-rc2

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Message-ID: <20130402151436.GC31577@thunk.org>
Date:	Tue, 2 Apr 2013 11:14:36 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Mel Gorman <mgorman@...e.de>, linux-ext4@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>, Jiri Slaby <jslaby@...e.cz>
Subject: Re: Excessive stall times on ext4 in 3.9-rc2

On Tue, Apr 02, 2013 at 11:06:51AM -0400, Theodore Ts'o wrote:
> 
> Can you try 3.9-rc4 or later and see if the problem still persists?
> There were a number of ext4 issues especially around low memory
> performance which weren't resolved until -rc4.

Actually, sorry, I took a closer look and I'm not as sure going to
-rc4 is going to help (although we did have some ext4 patches to fix a
number of bugs that flowed in as late as -rc4).

Can you send us the patch that you used to get record these long stall
times?  And I assume you're using a laptop drive?  5400RPM or 7200RPM?

	      	     	    	    	   - Ted
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