Andres Rodriguez 03c0c5f664 dma-buf: avoid scheduling on fence status query v2 ...

When a timeout of zero is specified, the caller is only interested in
the fence status.

In the current implementation, dma_fence_default_wait will always call
schedule_timeout() at least once for an unsignaled fence. This adds a
significant overhead to a fence status query.

Avoid this overhead by returning early if a zero timeout is specified.

v2: move early return after enable_signaling

Signed-off-by: Andres Rodriguez <andresx7@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170426144620.3560-1-andresx7@gmail.com

2017-04-27 16:56:10 -03:00

..

dma-buf.c

dma-buf: align debugfs output

2017-04-03 21:57:20 +05:30

dma-fence-array.c

dma-fence: add dma_fence_match_context helper

2017-03-17 23:51:36 +05:30

dma-fence.c

dma-buf: avoid scheduling on fence status query v2

2017-04-27 16:56:10 -03:00

Kconfig

dma-buf: Rename struct fence to dma_fence

2016-10-25 14:40:39 +02:00

Makefile

dma-buf: Rename struct fence to dma_fence

2016-10-25 14:40:39 +02:00

reservation.c

reservation: revert "wait only with non-zero timeout specified (v3)" v2

2016-11-09 00:48:57 +05:30

seqno-fence.c

dma-buf: Rename struct fence to dma_fence

2016-10-25 14:40:39 +02:00

sw_sync.c

dma-buf/sw_sync: put fence reference from the fence creation

2016-11-08 23:57:40 +05:30

sync_debug.c

dma-fence: Wrap querying the fence->status

2017-01-09 20:06:58 +05:30

sync_debug.h

dma-buf: Rename struct fence to dma_fence

2016-10-25 14:40:39 +02:00

sync_file.c

sync_file: get rid of internal reference count.

2017-04-18 10:27:38 -03:00

sync_trace.h

dma-buf/sw_sync: de-stage SW_SYNC

2016-08-15 16:41:46 +02:00