linux-kernel - Re: f2fs causes system stall

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20140424135910.f095d63eafdf136cc8851114@gmx.de>
Date:	Thu, 24 Apr 2014 13:59:10 +0200
From:	Marc Dietrich <marvin24@....de>
To:	jaegeuk.kim@...sung.com
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: f2fs causes system stall

Hi,

On Thu, 24 Apr 2014 08:54:30 +0900
Jaegeuk Kim <jaegeuk.kim@...sung.com> wrote:
> Thank you for the report.
> When I veiwed the patch at a glance, it seems that reverting is not a
> good way.
> 
> Instead, could you share the f2fs commit point that you're using?
> Then, since I have a suspect for this issue, I'd like to write a patch
> to test.

patch against linus master is ok for me. I'm happy to test your patch.

> 2014-04-24 (목), 00:00 +0200, Marc Dietrich:
> > 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
--
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/