linux-kernel - f2fs causes system stall

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Message-ID: <2601952.jk1l5iHOJT@ax5200p>
Date:	Thu, 24 Apr 2014 00:00:59 +0200
From:	Marc Dietrich <marvin24@....de>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
Subject: f2fs causes system stall

Hi,

it took me a while to bisect a problem which causes my ARM (tegra2) netbook to 
frequently stall for 5-10 seconds when I enable EXA acceleration (opentegra 
experimental ddx). I can only guess that the offending commit 8618b88 "f2fs: 
fix not to write data pages on the page reclaiming path" somehow causes high 
kernel latencies which may interrupt/disturb the command stream to the gpu in 
this particular case. Reverting this commit fixes the problem. Any hints?

Regards,

Marc

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