Quoting Daniel Vetter (2017-08-07 10:28:58) > On Fri, Aug 04, 2017 at 09:23:28AM +0100, Chris Wilson wrote: > > After an event is sent, we try to copy it into the user buffer of the > > first waiter in drm_read() and if the user buffer doesn't have enough > > room we put it back onto the list. However, we didn't wake up any > > subsequent waiter, so that event may sit on the list until either a new > > vblank event is sent or a new waiter appears. Rare, but in the worst > > case may lead to a stuck process. > > > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> > > New subtestcase in igt@drm_read? Caught it! Testcase: igt/drm_read/short-buffer-wakeup -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
