xfs
[Top] [All Lists]

Re: 3.14-rc2 XFS backtrace because irqs_disabled.

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: 3.14-rc2 XFS backtrace because irqs_disabled.
From: Dave Jones <davej@xxxxxxxxxx>
Date: Wed, 12 Feb 2014 00:50:27 -0500
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>, Linux Kernel <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20140212054043.GB13997@dastard>
Mail-followup-to: Dave Jones <davej@xxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>, Linux Kernel <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
References: <20140211172707.GA1749@xxxxxxxxxx> <20140211210841.GM13647@dastard> <52FA9ADA.9040803@xxxxxxxxxxx> <20140212004403.GA17129@xxxxxxxxxx> <20140212010941.GM18016@xxxxxxxxxxxxxxxxxx> <CA+55aFwoWT-0A_KTkXMkNqOy8hc=YmouTMBgWUD_z+8qYPphjA@xxxxxxxxxxxxxx> <20140212040358.GA25327@xxxxxxxxxx> <20140212042215.GN18016@xxxxxxxxxxxxxxxxxx> <20140212054043.GB13997@dastard>
User-agent: Mutt/1.5.21 (2010-09-15)
On Wed, Feb 12, 2014 at 04:40:43PM +1100, Dave Chinner wrote:

 > None of the XFS code disables interrupts in that path, not does is
 > call outside XFS except to dispatch IO. The stack is pretty deep at
 > this point and I know that the standard (non stacked) IO stack can
 > consume >3kb of stack space when it gets down to having to do memory
 > reclaim during GFP_NOIO allocation at the lowest level of SCSI
 > drivers. Stack overruns typically show up with symptoms like we are
 > seeing.
 > ..
 > 
 > Dave, before chasing ghosts, can you (like Eric originally asked)
 > turn on stack overrun detection?

CONFIG_DEBUG_STACKOVERFLOW ? Already turned on.

        Dave

<Prev in Thread] Current Thread [Next in Thread>