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Date: Sun, 10 Aug 2003 15:48:28 -0500
From: Matt Mackall <mpm@selenic.com>
To: Stig Brautaset <stig@brautaset.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.0-test3: Debug: sleeping function called from invalid context at include/asm/uaccess.h:473
Message-ID: <20030810204828.GA31810@waste.org>
References: <20030810161951.GA1009@brautaset.org>
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On Sun, Aug 10, 2003 at 05:19:51PM +0100, Stig Brautaset wrote:
> Hi, I just got this message on a 2.6.0-test3 kernel:
> 
> Debug: sleeping function called from invalid context at include/asm/uaccess.h:473
> Call Trace:
>  [<c0117c01>] __might_sleep+0x61/0x80
>  [<c010ba18>] save_v86_state+0x68/0x210
>  [<c01362f5>] generic_file_aio_write+0x85/0xb0
>  [<c010c547>] handle_vm86_fault+0xb7/0xa10
>  [<c0181a2f>] ext3_file_write+0x3f/0xd0
>  [<c010a330>] do_general_protection+0x0/0xa0
>  [<c0109625>] error_code+0x2d/0x38
>  [<c010947b>] syscall_call+0x7/0xb
> 
> I'm unsure what other information is needed, if any. 
> I'm not on list, so CC me on replies please.

This looks like the vm86 fault I described earlier. For some reason
vm86 mode writes part of its state out to userspace in its fault
handler and I can't find anything that guarantees that won't double
fault. Anyone?

It might be useful to know what video driver you're using and whether
or not you use Wine, Dosemu, or anything similar. Being able to
reproduce it easily would be handy too.

-- 
Matt Mackall : http://www.selenic.com : of or relating to the moon
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