linux-kernel - Re: [PATCH] drm/i915: Record error batch buffers using iomem

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Message-ID: <AANLkTilbqi5crUD8KXmZ5SIv92KioEAN7Ra6nk2ALU6F@mail.gmail.com>
Date:	Wed, 12 May 2010 18:45:55 +0530
From:	Jaswinder Singh Rajput <jaswinderlinux@...il.com>
To:	Chris Wilson <chris@...is-wilson.co.uk>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	dri-devel@...ts.freedesktop.org, Dave Airlie <airlied@...ux.ie>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/i915: Record error batch buffers using iomem

Hello Chris,

On Wed, May 12, 2010 at 1:23 AM, Chris Wilson <chris@...is-wilson.co.uk> wrote:
> On Wed, 12 May 2010 01:08:23 +0530, Jaswinder Singh Rajput <jaswinderlinux@...il.com> wrote:
>> Hello Chris and Andrew,
>>
>> I did further testing and noticed that this patch fixes the boot
>> errors and warnings and I get the XWindows.
>>
>> But XWindows freezes after some time.
>
> The BUG you were hitting before is on the error collection path which
> presumably is still being triggered during boot by a GPU error.
> Can you check to see if /sys/kernel/debug/dri/0/i915_error_state has
> recorded anything? And if not, wait until it freezes and then please file
> a bug report at bugs.freedesktop.org with the i915_error_state, Xorg.0.log
> and dmesg.
>

With this patch after XWindows freezes, I get :

[   70.433064] wlan0: no IPv6 routers present
[  227.490064] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer
elapsed... GPU hung
[  227.490098] ------------[ cut here ]------------
[  227.490124] WARNING: at mm/highmem.c:453 debug_kmap_atomic+0xa9/0x11e()
[  227.490135] Hardware name: Aspire one
[  227.490143] Modules linked in: nf_conntrack_ftp ath9k ath9k_common
ath9k_hw battery [last unloaded: scsi_wait_scan]
[  227.490183] Pid: 0, comm: swapper Not tainted 2.6.34-rc7-netbook #8
[  227.490193] Call Trace:
[  227.490214]  [<c1030ecb>] warn_slowpath_common+0x65/0x7c

freeze dmesg : http://userweb.kernel.org/~jaswinder/acer_netbook/dmesg_2634_chris_hang.txt

freeze Xorg.log : http://userweb.kernel.org/~jaswinder/acer_netbook/Xorg_log.txt

So it means this patches shifted the BUG and warning messages after
some time. So I can only work on XWindows for few minutes with this
patch.
Andrew patch is in linus git tree. Can you please update your patch
above Andrew patch. So that I can do further testing.

Thanks,
--
Jaswinder Singh.
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