linux-kernel - Re: [PATCH 0/5] reiserfs lock inversion fixes on xattr

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Date:	Wed, 30 Dec 2009 22:32:04 -0800 (PST)
From:	Christian Kujau <lists@...dbynature.de>
To:	Frederic Weisbecker <fweisbec@...il.com>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Alexander Beregalov <a.beregalov@...il.com>,
	Chris Mason <chris.mason@...cle.com>,
	Ingo Molnar <mingo@...e.hu>, reiserfs-devel@...r.kernel.org
Subject: Re: [PATCH 0/5] reiserfs lock inversion fixes on xattr

On Wed, 30 Dec 2009 at 21:42, Frederic Weisbecker wrote:
> I hope you can give it a try (and/or review) before I send the whole
> to Linus.

Without your patches, "dbench -x" was pretty much instantly causing the 
threads to lock up, forcing me to reboot the box. With LOCKDEP enabled, 
warnings were printed. After applying your patches (and a reboot) I've run 
"dbench -x" for quite a while now with different runtimes and number of
clients and it's not locking up any more. I've tested with:

CONFIG_REISERFS_FS=y
CONFIG_REISERFS_CHECK=y
CONFIG_REISERFS_PROC_INFO=y
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
# CONFIG_REISERFS_FS_SECURITY is not set

...and a few "Kernel hacking" options set. Full config and dmesg:

   http://nerdbynature.de/bits/2.6.33-rc1/reiserfs/t3/

   (although I'm not really testing -rc1 but latest mainline -git
    and your changes pulled)

So, feel free to add:

  Tested-by: Christian Kujau <lists@...dbynature.de>

I can't help with the code review though :-\

Thanks!
Christian.
-- 
BOFH excuse #208:

Your mail is being routed through Germany ... and they're censoring us.
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