AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-26 17:50:52 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm: Don't block the kworker waiting for mode_config.mutex in output_poll()

Browse Source 
If we cannot acquire the mode_config.mutex immediately, just back off and
queue a new attempt after the poll interval. This is mostly to stop the
hung task spam when the system is deadlocked, but it will also lessen
the load (in such extreme cases).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
[danvet:s/lock/mutex/ per Eric's comment.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161206113715.30382-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-12-06 11:37:15 +00:00 committed by Daniel Vetter
parent d5264ed382
commit 1fe7841d89
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/drm_probe_helper.c
View File

@ -392,7 +392,11 @@ static void output_poll_execute(struct work_struct *work)
if (!drm_kms_helper_poll)
goto out;
mutex_lock(&dev->mode_config.mutex);
if (!mutex_trylock(&dev->mode_config.mutex)) {
repoll = true;
goto out;
}
drm_for_each_connector(connector, dev) {
/* Ignore forced connectors. */