Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes: > On Thu, Jun 18, 2015 at 12:51:40PM +0300, Mika Kuoppala wrote: >> In order for gen8+ hardware to guarantee that no context switch >> takes place during engine reset and that current context is properly >> saved, the driver needs to notify and query hw before commencing >> with reset. >> >> There are gpu hangs where the engine gets so stuck that it never will >> report to be ready for reset. We could proceed with reset anyway, but >> with some hangs with skl, the forced gpu reset will result in a system >> hang. By inspecting the unreadiness for reset seems to correlate with >> the probable system hang. >> >> We will only proceed with reset if all engines report that they >> are ready for reset. If root cause for system hang is found and >> can be worked around with another means, we can reconsider if >> we can reinstate full reset for unreadiness case. >> >> v2: -EIO, Recovery, gen8 (Chris, Tomas, Daniel) >> v3: updated commit msg >> v4: timeout_ms, simpler error path (Chris) >> >> References: https://bugs.freedesktop.org/show_bug.cgi?id=89959 >> References: https://bugs.freedesktop.org/show_bug.cgi?id=90854 >> Testcase: igt/gem_concurrent_blit --r prw-blt-overwrite-source-read-rcs-forked >> Testcase: igt/gem_concurrent_blit --r gtt-blt-overwrite-source-read-rcs-forked > > Is this the new format for subtests? No. It is me cutpasting from scripts. Daniel could you please fix while merging. Thanks, -Mika > I thought the form was > igt/gem_concurrent_blit/prw-blt-overwrite-source-read-rcs-forked > >> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> >> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> >> Cc: Tomas Elf <tomas.elf@xxxxxxxxx> >> Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> > > Lgtm, > Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > -Chris > > -- > Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
