linux-kernel - Re: [PATCH 1/2] kill-the-bkl/reiserfs: acquire the inode mutex safely

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Message-ID: <9b1675090905301107t4884caccn937b0ccfd100d6aa@mail.gmail.com>
Date:	Sat, 30 May 2009 12:07:57 -0600
From:	"Trenton D. Adams" <trenton.d.adams@...il.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Al Viro <viro@...iv.linux.org.uk>,
	Reiserfs <reiserfs-devel@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Jeff Mahoney <jeffm@...e.com>,
	Chris Mason <chris.mason@...cle.com>,
	Ingo Molnar <mingo@...e.hu>,
	Alexander Beregalov <a.beregalov@...il.com>
Subject: Re: [PATCH 1/2] kill-the-bkl/reiserfs: acquire the inode mutex safely

On Sat, May 30, 2009 at 7:41 AM, Frederic Weisbecker <fweisbec@...il.com> wrote:
> On Fri, May 29, 2009 at 10:23:44PM -0600, Trenton D. Adams wrote:
>>
>> I was trying to imply that the patch might fix the problem I saw, not
>> that it was the cause.  I only though that because it mentioned a
>> potential deadlock, and it seems like that is what the problem I saw
>> was.
>
>
> Ah ok. No it's part of a tree which reworks the reiserfs locking scheme
> by removing the old one based on the legacy and obsolete bkl (big kernel
> lock). In this tree I had to fix several deadlocks or at least unsafe
> lock states because the bkl is converted into a mutex and some new lock
> dependencies were borned after that. But these issues had nothing
> to deal with upstream problems.
>
> BTW, would you be interested in giving a try with this reiserfs bkl
> removal tree? I really lack testing and feedbacks from users.

Well, the problem is that I only use reiserfs on my usb stick at the
moment.  So, the amount of testing I could do would be minimal at the
moment.  However, if I change my local filesystems to reiserfs, I will
remember to check back here for your patch.

Thanks.
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