On Tue, 23 Oct 2012 14:38:30 +0900, Norbert Preining preining@logic.at wrote:
Hi everyone,
(please Cc)
I am running 3.7-rc2 and got recently hit a few times (under rc1, too) by hanging drm i915 while doing large io operations.
[snip]
I captured the i915_error_state and uploaded it here: http://www.logic.at/people/preining/drm_i915_error_state.gz
The hangs have been normally initiated on svn up in a very big repository, or git checkout on a very big repository or so.
Other system is Debian/unstable. The above output and error state is from after a reboot without any suspends or other tricks inbetween, uptime 3.5h.
Looks like fallout from a missing ILK rc6 workaround - it looks like the write to the ring tail never landed and so the command streamer hung.
See https://bugs.freedesktop.org/show_bug.cgi?id=55984 and http://cgit.freedesktop.org/~danvet/drm/log/?h=ilk-wa-pile of which I think http://cgit.freedesktop.org/~danvet/drm/commit/?h=ilk-wa-pile&id=0d5fed2... is the missing ingredient. -Chris