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Until I have a chance to further evaluate and re-work the locking here,

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change from an adaptive to spin mutex @ IPL_TTY.  This seems to mitigate
or eliminate a lot of locking-related issues (such as a hang when running
glxgears under AIGLX).  Tested by me and Vincent <10.50@free.fr>.

In this code, we have three locks: irq, dma, and device.  If anyone has
any thoughts on how to improve this situation, e.g. by using different
lock types/priorities/soft interrupts/etc. for different locks, please
share them with me.

NOTE: I've had the best results thusfar using Mesa 7.0.2-rc1 (r300 users
could even try the r300 driver code from the master branch) and xorg-server
1.4+patches from GIT.
This commit is contained in:
bjs 2007-11-01 13:20:04 +00:00
parent a3bf2627a4
commit d81bca762e
1 changed files with 1 additions and 1 deletions
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2
sys/dev/drm/drmP.h
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@ -227,7 +227,7 @@ MALLOC_DECLARE(M_DRM);
#define DRM_STRUCTPROC struct proc
#define DRM_STRUCTCDEVPROC struct lwp
#define DRM_SPINTYPE kmutex_t
#define DRM_SPININIT(l,name) mutex_init(l, MUTEX_DRIVER, IPL_NONE)
#define DRM_SPININIT(l,name) mutex_init(l, MUTEX_DRIVER, IPL_TTY)
#define DRM_SPINUNINIT(l) mutex_destroy(l)
#define DRM_SPINLOCK(l) mutex_enter(l)
#define DRM_SPINUNLOCK(u) mutex_exit(u)