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Re: 3.14-rc2 XFS backtrace because irqs_disabled.

To: Dave Jones <davej@xxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, Linux Kernel <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: 3.14-rc2 XFS backtrace because irqs_disabled.
From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Date: Wed, 12 Feb 2014 01:09:41 +0000
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20140212004403.GA17129@xxxxxxxxxx>
References: <20140211172707.GA1749@xxxxxxxxxx> <20140211210841.GM13647@dastard> <52FA9ADA.9040803@xxxxxxxxxxx> <20140212004403.GA17129@xxxxxxxxxx>
Sender: Al Viro <viro@xxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Tue, Feb 11, 2014 at 07:44:03PM -0500, Dave Jones wrote:

> The 'good' news is I seem to be able to reproduce it fairly quickly.
> I've seen it 3-4 times this afternoon. (Always from the coredump path)
> I was on vacation last week, but I wasn't hitting this before then, so it's a
> fairly recent change that's introduced this.

Slap the check in vfs_create(), see if interrupts had been disabled by it or
by something in ->create().  Since it's reproducible...

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