Subject : 2.6.32-rc5-git3 -- System lockup running "cat /sys/kernel/debug/dri/0/i915_regs"
Submitter : Miles Lane <email@example.com>
Date : 2009-10-26 4:00
References : http://marc.info/?l=linux-kernel&m=125652968117713&w=4
This entry is being used for tracking a regression from 2.6.31. Please don't
close it until the problem is fixed in the mainline.
Zhenyu, I think you mentioned you would fix this one? I don't think it's a high prio since it's just a debug file, but hanging is pretty unfriendly.
Sorry for missed this one for long time. I was thinking at lease we need to ask for explicitly enable all regs reading before actually doing so, but now I wonder who is the real user of this debug? If something really need that, we can do it totally in intel-gpu-tools instead of exposing this in kernel which is danger.
So I think we should remove that completely.
Patch is in Linus tree.
Author: Zhenyu Wang <firstname.lastname@example.org>
Date: Mon Dec 28 13:23:36 2009 +0800
drm/i915: remove full registers dump debug
This one reverts 9e3a6d155ed0a7636b926a798dd7221ea107b274.
As reported by http://bugzilla.kernel.org/show_bug.cgi?id=14485,
this dump will cause hang problem on some machine. If something
really needs this kind of full registers dump, that could be done
Cc: Ben Gamari <email@example.com>
Signed-off-by: Zhenyu Wang <firstname.lastname@example.org>
Signed-off-by: Eric Anholt <email@example.com>
Patch is upstream, closing.