]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915/perf: rate limit spurious oa report notice
authorRobert Bragg <robert@sixbynine.org>
Thu, 11 May 2017 15:43:31 +0000 (16:43 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Sat, 13 May 2017 10:03:43 +0000 (11:03 +0100)
commitc348b44642b5974e686368561b3f8d8d552f1694
treea1cfafd6abfdae880c6c1369b78edab0361db929
parentfb04adaa766b0d9f889f85abc937138d5c04cbfb
drm/i915/perf: rate limit spurious oa report notice

This change is pre-emptively aiming to avoid a potential cause of kernel
logging noise in case some condition were to result in us seeing invalid
OA reports.

The workaround for the OA unit's tail pointer race condition is what
avoids the primary known cause of invalid reports being seen and with
that in place we aren't expecting to see this notice but it can't be
entirely ruled out.

Just in case some condition does lead to the notice then it's likely
that it will be triggered repeatedly while attempting to append a
sequence of reports and depending on the configured OA sampling
frequency that might be a large number of repeat notices.

v2: (Chris) avoid inconsistent warning on throttle with
    printk_ratelimit()
v3: (Matt) init and summarise with stream init/close not driver init/fini

Signed-off-by: Robert Bragg <robert@sixbynine.org>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511154345.962-9-lionel.g.landwerlin@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/i915/i915_perf.c