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[RFC,2/2] drm: Change deadlock-avoidance algorithm for the modeset locks.

Message ID 20180525123855.28956-3-thellstrom@vmware.com (mailing list archive)
State New, archived
Headers show

Commit Message

Thomas Hellstrom May 25, 2018, 12:38 p.m. UTC 
For modeset locks we don't expect a high number of contending
transactions so change algorithm from Wait-Die to Wound-Wait.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
---
 drivers/gpu/drm/drm_modeset_lock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
index f22a7ef41de1..294997765a2c 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -70,7 +70,7 @@ 
  * lists and lookup data structures.
  */
 
-static DEFINE_WW_CLASS(crtc_ww_class, true);
+static DEFINE_WW_CLASS(crtc_ww_class, false);
 
 /**
  * drm_modeset_lock_all - take all modeset locks