Author: rnoland
Date: Thu Mar 19 08:36:08 2009
New Revision: 190023
URL: http://svn.freebsd.org/changeset/base/190023
Log:
Add some debugging so I can see when syscalls are being restarted
consistantly. After a lengthy irc discussion it seems like we
shouldn't need to worry about them, but it's nice to know about.
MFC after: 3 days
Modified:
head/sys/dev/drm/drm_lock.c
head/sys/dev/drm/mga_irq.c
head/sys/dev/drm/radeon_irq.c
Modified: head/sys/dev/drm/drm_lock.c
==============================================================================
--- head/sys/dev/drm/drm_lock.c Thu Mar 19 08:34:04 2009 (r190022)
+++ head/sys/dev/drm/drm_lock.c Thu Mar 19 08:36:08 2009 (r190023)
@@ -87,7 +87,12 @@ int drm_lock(struct drm_device *dev, voi
break;
}
DRM_UNLOCK();
- DRM_DEBUG("%d %s\n", lock->context, ret ? "interrupted" : "has lock");
+
+ if (ret == ERESTART)
+ DRM_DEBUG("restarting syscall\n");
+ else
+ DRM_DEBUG("%d %s\n", lock->context,
+ ret ? "interrupted" : "has lock");
if (ret != 0)
return ret;
Modified: head/sys/dev/drm/mga_irq.c
==============================================================================
--- head/sys/dev/drm/mga_irq.c Thu Mar 19 08:34:04 2009 (r190022)
+++ head/sys/dev/drm/mga_irq.c Thu Mar 19 08:36:08 2009 (r190023)
@@ -139,6 +139,9 @@ int mga_driver_fence_wait(struct drm_dev
(((cur_fence = atomic_read(&dev_priv->last_fence_retired))
- *sequence) <= (1 << 23)));
+ if (ret == -ERESTART)
+ DRM_DEBUG("restarting syscall\n");
+
*sequence = cur_fence;
return ret;
Modified: head/sys/dev/drm/radeon_irq.c
==============================================================================
--- head/sys/dev/drm/radeon_irq.c Thu Mar 19 08:34:04 2009
(r190022)
+++ head/sys/dev/drm/radeon_irq.c Thu Mar 19 08:36:08 2009
(r190023)
@@ -282,6 +282,9 @@ static int radeon_wait_irq(struct drm_de
DRM_WAIT_ON(ret, dev_priv->swi_queue, 3 * DRM_HZ,
RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr);
+ if (ret == -ERESTART)
+ DRM_DEBUG("restarting syscall");
+
return ret;
}
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