linux-kernel - Re: OOPS: 2.6.24-rc5-mm1 -- EIP is at r_show+0x2a/0x70 -- (triggered by "cat /proc/iomem")

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Message-ID: <a44ae5cd0712200454vc8ff0fbo20d0ee216557efac@mail.gmail.com>
Date:	Thu, 20 Dec 2007 07:54:48 -0500
From:	"Miles Lane" <miles.lane@...il.com>
To:	"David Howells" <dhowells@...hat.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Ingo Molnar" <mingo@...hat.com>,
	"Russell King" <rmk+lkml@....linux.org.uk>
Subject: Re: OOPS: 2.6.24-rc5-mm1 -- EIP is at r_show+0x2a/0x70 -- (triggered by "cat /proc/iomem")

On Dec 20, 2007 6:37 AM, David Howells <dhowells@...hat.com> wrote:
> Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> > I would be suspecting iget-stop-procfs-from-using-iget-and-read_inode.patch.
>
> I think your suspicions are very unlikely.  The patch only affects
> proc_get_inode() - and looking at the patch backtrace, it looks like the
> system is successfully past that already (it's unlikely that
> proc_reg_read+0x60/0x74 would have been reached otherwise).
>
> If my patch to procfs is wrong, it would affect all proc files and ought be
> immediately detectable.

I tested the patch Andrew sent.  I ran "cat /proc/iomem" before trying
a suspend-to-disk.  It worked fine.  Then I suspended and resumed.
This time, "cat /proc/iomem" caused the stack trace to be generated.
So, you are right, you patch is not the problem.

Thanks,
              Miles
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