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From: Thomas Hellstrom <thellstrom@vmware.com>
To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Subject: [PATCH 2/2] drm: Change deadlock-avoidance algorithm for the modeset locks.
Date: Wed, 13 Jun 2018 09:47:45 +0200	[thread overview]
Message-ID: <20180613074745.14750-3-thellstrom@vmware.com> (raw)
In-Reply-To: <20180613074745.14750-1-thellstrom@vmware.com>

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(-)

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
-- 
2.14.3


WARNING: multiple messages have this Message-ID (diff)
From: Thomas Hellstrom <thellstrom@vmware.com>
To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Subject: [PATCH 2/2] drm: Change deadlock-avoidance algorithm for the modeset locks.
Date: Wed, 13 Jun 2018 09:47:45 +0200	[thread overview]
Message-ID: <20180613074745.14750-3-thellstrom@vmware.com> (raw)
In-Reply-To: <20180613074745.14750-1-thellstrom@vmware.com>

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(-)

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
-- 
2.14.3

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  parent reply	other threads:[~2018-06-13  7:48 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-13  7:47 [PATCH 0/2] locking,drm: Fix ww mutex naming / algorithm inconsistency Thomas Hellstrom
2018-06-13  7:47 ` [PATCH 0/2] locking, drm: " Thomas Hellstrom
2018-06-13  7:47 ` [PATCH 1/2] locking: Implement an algorithm choice for Wound-Wait mutexes Thomas Hellstrom
2018-06-13  7:47   ` Thomas Hellstrom
2018-06-13  7:47   ` Thomas Hellstrom
2018-06-13  7:54   ` Greg Kroah-Hartman
2018-06-13  7:54     ` Greg Kroah-Hartman
2018-06-13  7:54     ` Greg Kroah-Hartman
2018-06-13  8:34     ` Thomas Hellstrom
2018-06-13  8:34       ` Thomas Hellstrom
2018-06-13  8:34       ` Thomas Hellstrom
2018-06-13  9:50   ` Peter Zijlstra
2018-06-13  9:50     ` Peter Zijlstra
2018-06-13  9:50     ` Peter Zijlstra
2018-06-13 10:40     ` Thomas Hellstrom
2018-06-13 10:40       ` Thomas Hellstrom
2018-06-13 10:40       ` Thomas Hellstrom
2018-06-13 13:10       ` Peter Zijlstra
2018-06-13 13:10         ` Peter Zijlstra
2018-06-13 13:10         ` Peter Zijlstra
2018-06-13 14:05         ` Thomas Hellstrom
2018-06-13 14:05           ` Thomas Hellstrom
2018-06-13 14:05           ` Thomas Hellstrom
2018-06-14 10:51           ` Peter Zijlstra
2018-06-14 10:51             ` Peter Zijlstra
2018-06-14 10:51             ` Peter Zijlstra
2018-06-14 11:48             ` Thomas Hellstrom
2018-06-14 11:48               ` Thomas Hellstrom
2018-06-14 11:48               ` Thomas Hellstrom
2018-06-14 14:42               ` Peter Zijlstra
2018-06-14 14:42                 ` Peter Zijlstra
2018-06-14 14:42                 ` Peter Zijlstra
2018-06-14 16:43                 ` Thomas Hellstrom
2018-06-14 16:43                   ` Thomas Hellstrom
2018-06-14 16:43                   ` Thomas Hellstrom
2018-06-14 18:51                   ` Peter Zijlstra
2018-06-14 18:51                     ` Peter Zijlstra
2018-06-14 18:51                     ` Peter Zijlstra
2018-06-15 12:07                     ` Thomas Hellstrom
2018-06-15 12:07                       ` Thomas Hellstrom
2018-06-15 12:07                       ` Thomas Hellstrom
2018-06-13  7:47 ` Thomas Hellstrom [this message]
2018-06-13  7:47   ` [PATCH 2/2] drm: Change deadlock-avoidance algorithm for the modeset locks Thomas Hellstrom

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