Re: [PATCH] dma-buf: fix debugfs versus rcu and fence dumping v2

2018-12-06 Thread Chris Wilson
Quoting jgli...@redhat.com (2018-12-06 15:47:04) > From: Jérôme Glisse > > The debugfs take reference on fence without dropping them. Also the > rcu section are not well balance. Fix all that ... Wouldn't the code be a lot simpler (and a consistent snapshot) if it used reservation_object_get_fen

Re: [PATCH] dma-fence: Make dma_fence_add_callback() fail if signaled with error

2018-05-15 Thread Chris Wilson
Quoting Ezequiel Garcia (2018-05-14 22:28:31) > On Mon, 2018-05-14 at 18:48 +0200, Daniel Vetter wrote: > > On Fri, May 11, 2018 at 08:27:41AM +0100, Chris Wilson wrote: > > > Quoting Ezequiel Garcia (2018-05-09 21:14:49) > > > > Change how dma_fence_add_call

Re: [PATCH] dma-fence: Make dma_fence_add_callback() fail if signaled with error

2018-05-11 Thread Chris Wilson
Quoting Ezequiel Garcia (2018-05-09 21:14:49) > Change how dma_fence_add_callback() behaves, when the fence > has error-signaled by the time it is being add. After this commit, > dma_fence_add_callback() returns the fence error, if it > has error-signaled before dma_fence_add_callback() is called.

Re: [PATCH] dma-fence: Make dma_fence_add_callback() fail if signaled with error

2018-05-11 Thread Chris Wilson
Quoting Ezequiel Garcia (2018-05-10 13:51:56) > On Wed, 2018-05-09 at 19:42 -0300, Gustavo Padovan wrote: > > Hi Ezequiel, > > > > On Wed, 2018-05-09 at 17:14 -0300, Ezequiel Garcia wrote: > > > Change how dma_fence_add_callback() behaves, when the fence > > > has error-signaled by the time it is

Re: [PATCH 04/15] dma-fence: Make ->wait callback optional

2018-05-04 Thread Chris Wilson
Quoting Daniel Vetter (2018-05-03 15:25:52) > Almost everyone uses dma_fence_default_wait. > > v2: Also remove the BUG_ON(!ops->wait) (Chris). I just don't get the rationale for implicit over explicit. -Chris

Re: [PATCH 02/15] dma-fence: Make ->enable_signaling optional

2018-05-03 Thread Chris Wilson
Quoting Daniel Vetter (2018-05-03 15:25:50) > @@ -560,7 +567,7 @@ dma_fence_init(struct dma_fence *fence, const struct > dma_fence_ops *ops, >spinlock_t *lock, u64 context, unsigned seqno) > { > BUG_ON(!lock); > - BUG_ON(!ops || !ops->wait || !ops->enable_signaling |

Re: [PATCH 1/5] dma-buf: add optional invalidate_mappings callback v2

2018-03-19 Thread Chris Wilson
Quoting Christian König (2018-03-16 14:22:32) [snip, probably lost too must context] > This allows for full grown pipelining, e.g. the exporter can say I need > to move the buffer for some operation. Then let the move operation wait > for all existing fences in the reservation object and install

Re: [PATCH 1/5] dma-buf: add optional invalidate_mappings callback v2

2018-03-16 Thread Chris Wilson
Quoting Christian König (2018-03-16 13:20:45) > @@ -326,6 +338,29 @@ struct dma_buf_attachment { > struct device *dev; > struct list_head node; > void *priv; > + > + /** > +* @invalidate_mappings: > +* > +* Optional callback provided by the impo

Re: [PATCH] reservation: don't wait when timeout=0

2017-11-21 Thread Chris Wilson
Quoting Christian König (2017-11-21 15:49:55) > Am 21.11.2017 um 15:59 schrieb Rob Clark: > > On Tue, Nov 21, 2017 at 9:38 AM, Chris Wilson > > wrote: > >> Quoting Rob Clark (2017-11-21 14:08:46) > >>> If we are testing if a reservation object's fence

Re: [PATCH] reservation: don't wait when timeout=0

2017-11-21 Thread Chris Wilson
Quoting Rob Clark (2017-11-21 14:08:46) > If we are testing if a reservation object's fences have been > signaled with timeout=0 (non-blocking), we need to pass 0 for > timeout to dma_fence_wait_timeout(). > > Plus bonus spelling correction. > > Signed-off-by: Rob Clark > --- > drivers/dma-buf/

Re: [PATCH] dma-buf: remove redundant initialization of sg_table

2017-09-15 Thread Chris Wilson
quot;warning: Value stored to 'sg_table' during its initialization is > never read" > > Signed-off-by: Colin Ian King Reviewed-by: Chris Wilson -Chris

Re: [PATCH] dma-fence: fix dma_fence_get_rcu_safe

2017-09-11 Thread Chris Wilson
Quoting Christian König (2017-09-11 10:57:57) > Am 11.09.2017 um 11:23 schrieb Chris Wilson: > > Quoting Christian König (2017-09-11 10:06:50) > >> Am 11.09.2017 um 10:59 schrieb Chris Wilson: > >>> Quoting Christian König (2017-09-11 09:50:40) > >>>>

Re: [PATCH] dma-fence: fix dma_fence_get_rcu_safe

2017-09-11 Thread Chris Wilson
Quoting Christian König (2017-09-11 10:06:50) > Am 11.09.2017 um 10:59 schrieb Chris Wilson: > > Quoting Christian König (2017-09-11 09:50:40) > >> Sorry for the delayed response, but your mail somehow ended up in the > >> Spam folder. > >> > >>

Re: [PATCH] dma-fence: fix dma_fence_get_rcu_safe

2017-09-11 Thread Chris Wilson
Quoting Christian König (2017-09-11 09:50:40) > Sorry for the delayed response, but your mail somehow ended up in the > Spam folder. > > Am 04.09.2017 um 15:40 schrieb Chris Wilson: > > Quoting Christian König (2017-09-04 14:27:33) > >> From: Christian König >

Re: [PATCH] dma-fence: fix dma_fence_get_rcu_safe

2017-09-04 Thread Chris Wilson
Quoting Christian König (2017-09-04 14:27:33) > From: Christian König > > The logic is buggy and unnecessary complex. When dma_fence_get_rcu() fails to > acquire a reference it doesn't necessary mean that there is no fence at all. > > It usually mean that the fence was replaced by a new one and

Re: [PATCH] dma-buf/sw_sync: Fix timeline/pt overflow cases

2017-06-28 Thread Chris Wilson
Quoting Sean Paul (2017-06-28 16:51:11) > Protect against long-running processes from overflowing the timeline > and creating fences that go back in time. While we're at it, avoid > overflowing while we're incrementing the timeline. > > Signed-off-by: Sean Paul > --- > drivers/dma-buf/sw_sync.c

Re: [PATCH v2] dma-buf: Wait on the reservation object when sync'ing before CPU access

2016-12-19 Thread Chris Wilson
On Mon, Dec 19, 2016 at 10:40:41AM +0900, Inki Dae wrote: > > > 2016년 08월 16일 01:02에 Daniel Vetter 이(가) 쓴 글: > > On Mon, Aug 15, 2016 at 04:42:18PM +0100, Chris Wilson wrote: > >> Rendering operations to the dma-buf are tracked implicitly via the > >> reservati

Re: [Intel-gfx] [PATCH 1/4] lib/scatterlist: Fix offset type in sg_alloc_table_from_pages

2016-11-14 Thread Chris Wilson
t is > wide enough. > > Also converts callers which were using unsigned long locally > with the lower_32_bits annotation to make it explicitly > clear what is happening. > > v2: Use offset_in_page. (Chris Wilson) > > Signed-off-by: Tvrtko Ursulin > Cc: Masahiro Yamada

Re: [PATCH 4/5] drm/i915: Use __sg_alloc_table_from_pages for allocating object backing store

2016-10-21 Thread Chris Wilson
return -ENOMEM; Full circle! The whole reason this exists was to avoid that vmalloc. I don't really want it back... -Chris -- Chris Wilson, Intel Open Source Technology Centre -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

Re: [Intel-gfx] [PATCH 11/11] dma-buf: Do a fast lockless check for poll with timeout=0

2016-09-23 Thread Chris Wilson
On Fri, Sep 23, 2016 at 03:50:44PM +0200, Daniel Vetter wrote: > On Mon, Aug 29, 2016 at 08:08:34AM +0100, Chris Wilson wrote: > > Currently we install a callback for performing poll on a dma-buf, > > irrespective of the timeout. This involves taking a spinlock, as well as >

Re: [Intel-gfx] [PATCH 11/11] dma-buf: Do a fast lockless check for poll with timeout=0

2016-09-23 Thread Chris Wilson
On Fri, Sep 23, 2016 at 03:50:44PM +0200, Daniel Vetter wrote: > On Mon, Aug 29, 2016 at 08:08:34AM +0100, Chris Wilson wrote: > > Currently we install a callback for performing poll on a dma-buf, > > irrespective of the timeout. This involves taking a spinlock, as well as >

Re: [Intel-gfx] [PATCH 11/11] dma-buf: Do a fast lockless check for poll with timeout=0

2016-09-23 Thread Chris Wilson
On Fri, Sep 23, 2016 at 03:50:44PM +0200, Daniel Vetter wrote: > On Mon, Aug 29, 2016 at 08:08:34AM +0100, Chris Wilson wrote: > > Currently we install a callback for performing poll on a dma-buf, > > irrespective of the timeout. This involves taking a spinlock, as well as >

Re: [Linaro-mm-sig] [PATCH 10/11] dma-buf: Use seqlock to close RCU race in test_signaled_single

2016-09-23 Thread Chris Wilson
On Fri, Sep 23, 2016 at 03:49:26PM +0200, Daniel Vetter wrote: > On Mon, Aug 29, 2016 at 08:08:33AM +0100, Chris Wilson wrote: > > With the seqlock now extended to cover the lookup of the fence and its > > testing, we can perform that testing solely under the seqlock guard an

[PATCH] dma-buf/sync-file: Avoid enable fence signaling if poll(.timeout=0)

2016-08-29 Thread Chris Wilson
If we being polled with a timeout of zero, a nonblocking busy query, we don't need to install any fence callbacks as we will not be waiting. As we only install the callback once, the overhead comes from the atomic bit test that also causes serialisation between threads. Signed-off-by:

[PATCH 11/11] dma-buf: Do a fast lockless check for poll with timeout=0

2016-08-29 Thread Chris Wilson
callback to make the busy-query fast. Single thread: 60% faster 8 threads on 4 (+4 HT) cores: 600% faster Still not quite the perfect scaling we get with a native busy ioctl, but poll(dmabuf) is faster due to the quicker lookup of the object and avoiding drm_ioctl(). Signed-off-by: Chris Wilson Cc

[PATCH 06/11] dma-buf: Introduce fence_get_rcu_safe()

2016-08-29 Thread Chris Wilson
: Chris Wilson Cc: Daniel Vetter Cc: Sumit Semwal Cc: linux-media@vger.kernel.org Cc: dri-de...@lists.freedesktop.org Cc: linaro-mm-...@lists.linaro.org --- include/linux/fence.h | 56 ++- 1 file changed, 51 insertions(+), 5 deletions(-) diff --git

[PATCH 09/11] dma-buf: Restart reservation_object_test_signaled_rcu() after writes

2016-08-29 Thread Chris Wilson
section does not prevent this reallocation, instead we have to inspect the reservation's seqlock to double check if the fences have been reassigned as we were acquiring our reference. Signed-off-by: Chris Wilson Cc: Daniel Vetter Cc: Maarten Lankhorst Cc: Christian König Cc: Alex Deuche

[PATCH 08/11] dma-buf: Restart reservation_object_wait_timeout_rcu() after writes

2016-08-29 Thread Chris Wilson
section does not prevent this reallocation, instead we have to inspect the reservation's seqlock to double check if the fences have been reassigned as we were acquiring our reference. Signed-off-by: Chris Wilson Cc: Daniel Vetter Cc: Maarten Lankhorst Cc: Christian König Cc: Alex Deuche

[PATCH 07/11] dma-buf: Restart reservation_object_get_fences_rcu() after writes

2016-08-29 Thread Chris Wilson
section does not prevent this reallocation, instead we have to inspect the reservation's seqlock to double check if the fences have been reassigned as we were acquiring our reference. Signed-off-by: Chris Wilson Cc: Daniel Vetter Cc: Maarten Lankhorst Cc: Christian König Cc: Alex Deuche

[PATCH 10/11] dma-buf: Use seqlock to close RCU race in test_signaled_single

2016-08-29 Thread Chris Wilson
test it, the same guarantee that made it safe to acquire the reference previously. The seqlock tests whether the fence was replaced as we are testing it telling us whether or not we can trust the result (if not, we just repeat the test until stable). Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc

Re: [PATCH] dma-buf: Do a fast lockless check for poll with timeout=0

2016-08-28 Thread Chris Wilson
On Sun, Aug 28, 2016 at 09:33:54PM +0100, Chris Wilson wrote: > On Sun, Aug 28, 2016 at 05:37:47PM +0100, Chris Wilson wrote: > > Currently we install a callback for performing poll on a dma-buf, > > irrespective of the timeout. This involves taking a spinlock, as well as > >

Re: [PATCH] dma-buf: Do a fast lockless check for poll with timeout=0

2016-08-28 Thread Chris Wilson
On Sun, Aug 28, 2016 at 05:37:47PM +0100, Chris Wilson wrote: > Currently we install a callback for performing poll on a dma-buf, > irrespective of the timeout. This involves taking a spinlock, as well as > unnecessary work, and greatly reduces scaling of poll(.timeout=0) across > mult

[PATCH] dma-buf: Do a fast lockless check for poll with timeout=0

2016-08-28 Thread Chris Wilson
callback to make the busy-query fast. Single thread: 60% faster 8 threads on 4 (+4 HT) cores: 600% faster Still not quite the perfect scaling we get with a native busy ioctl, but poll(dmabuf) is faster due to the quicker lookup of the object and avoiding drm_ioctl(). Signed-off-by: Chris Wilson Cc

[PATCH v2] dma-buf: Wait on the reservation object when sync'ing before CPU access

2016-08-15 Thread Chris Wilson
igt/prime_vgem Testcase: igt/gem_concurrent_blit # *vgem* Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Daniel Vetter Cc: Eric Anholt Cc: linux-media@vger.kernel.org Cc: dri-de...@lists.freedesktop.org Cc: linaro-mm-...@lists.linaro.org Cc: linux-ker...@vger.kernel.org --- drivers/dma-buf/

[PATCH v2] dma-buf: Wait on the reservation object when sync'ing before CPU access

2016-08-15 Thread Chris Wilson
igt/prime_vgem Testcase: igt/gem_concurrent_blit # *vgem* Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Daniel Vetter Cc: Eric Anholt Cc: linux-media@vger.kernel.org Cc: dri-de...@lists.freedesktop.org Cc: linaro-mm-...@lists.linaro.org Cc: linux-ker...@vger.kernel.org --- drivers/dma-buf/

[PATCH] dma-buf: Release module reference on creation failure

2016-07-18 Thread Chris Wilson
If we fail to create the anon file, we need to remember to release the module reference on the owner. Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen Cc: Joonas Lahtinen Cc: Sumit Semwal Cc: Daniel Vetter Cc: linux-media@vger.kernel.org Cc: dri-de...@lists.freedesktop.org Cc: linaro

[PATCH v2 3/7] kfence: Extend kfences for listening on DMA fences

2016-07-17 Thread Chris Wilson
dma-buf provides an interfaces for receiving notifications from DMA hardware, and for implicitly tracking fences used for rendering into dma-buf. We want to be able to use these event sources along with kfence for easy collection and combining with other events. Signed-off-by: Chris Wilson Cc

[PATCH v2 1/7] kfence: Introduce kfence, a N:M completion mechanism

2016-07-17 Thread Chris Wilson
provides a building block which can be used for determining an order in which tasks can execute. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc: "Paul E. McKenney"

[PATCH v2 2/7] kfence: Wrap hrtimer to provide a time source for a kfence

2016-07-17 Thread Chris Wilson
A common requirement when scheduling a task is that it should be not be begun until a certain point in time is passed (e.g. queue_delayed_work()). kfence_await_hrtimer() causes the kfence to asynchronously wait until after the appropriate time before being woken. Signed-off-by: Chris Wilson Cc

[PATCH v2 7/7] async: Introduce a dependency resolver for parallel execution

2016-07-17 Thread Chris Wilson
async_dependency_get() retrieves a kfence for inspection or waiting upon. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc: "Paul E. McKenney" Cc: Dan Williams Cc: Andrey Ry

[PATCH v2 6/7] async: Add execution barriers

2016-07-17 Thread Chris Wilson
. not be scheduled) until all work queued before the barrier is completed. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc: "Paul E. McKenney" Cc: Dan Williams

[PATCH v2 5/7] async: Add support for explicit fine-grained barriers

2016-07-17 Thread Chris Wilson
scheme based upon kfences and back every task with one. Any task may now wait upon the kfence before being scheduled, and equally the kfence may be used to wait on the task itself (rather than waiting on the cookie for all previous tasks to be completed). Signed-off-by: Chris Wilson Cc: Sumit Semwal

Re: [PATCH 2/9] async: Introduce kfence, a N:M completion mechanism

2016-07-13 Thread Chris Wilson
On Wed, Jul 13, 2016 at 11:38:52AM +0200, Peter Zijlstra wrote: > On Fri, Jun 24, 2016 at 10:08:46AM +0100, Chris Wilson wrote: > > diff --git a/kernel/async.c b/kernel/async.c > > index d2edd6efec56..d0bcb7cc4884 100644 > > --- a/kernel/async.c > > +++ b/kernel

[PATCH 2/9] async: Introduce kfence, a N:M completion mechanism

2016-06-24 Thread Chris Wilson
() / kfence_add_completion() sets the kfence to wait upon another fence, or completion respectively. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc: "Paul E. McKenney" Cc: Da

[PATCH 7/9] async: Add support for explicit fine-grained barriers

2016-06-24 Thread Chris Wilson
scheme based upon kfences and back every task with one. Any task may now wait upon the kfence before being scheduled, and equally the kfence may be used to wait on the task itself (rather than waiting on the cookie for all previous tasks to be completed). Signed-off-by: Chris Wilson Cc: Sumit Semwal

[PATCH 6/9] async: Add a convenience wrapper for waiting on implicit dma-buf

2016-06-24 Thread Chris Wilson
fences from the object and adds the individual waits for the kfence. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc: "Paul E. McKenney" Cc: Dan Williams Cc: Andre

[PATCH 8/9] async: Add execution barriers

2016-06-24 Thread Chris Wilson
. not be scheduled) until all work queued before the barrier is completed. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc: "Paul E. McKenney" Cc: Dan Williams

[PATCH 5/9] async: Wrap hrtimer to provide a time source for a kfence

2016-06-24 Thread Chris Wilson
kfence_add_delay() is a convenience wrapper around hrtimer_start_range_ns() to provide a time source for a kfence graph. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc

[PATCH 4/9] async: Extend kfences for listening on DMA fences

2016-06-24 Thread Chris Wilson
dma-buf provides an interfaces for receiving notifications from DMA hardware. kfence provides a useful interface for collecting such fences and combining them with other events. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc

[PATCH 9/9] async: Introduce a dependency resolver for parallel execution

2016-06-24 Thread Chris Wilson
async_dependency_get() retrieves a kfence for inspection or waiting upon. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc: "Paul E. McKenney" Cc: Dan Williams Cc: Andrey Ry

[PATCH 3/9] async: Extend kfence to allow struct embedding

2016-06-24 Thread Chris Wilson
-off-by: Chris Wilson Cc: Sumit Semwal Cc: Shuah Khan Cc: Tejun Heo Cc: Daniel Vetter Cc: Andrew Morton Cc: Ingo Molnar Cc: Kees Cook Cc: Thomas Gleixner Cc: "Paul E. McKenney" Cc: Dan Williams Cc: Andrey Ryabinin Cc: Davidlohr Bueso Cc: Nikolay Aleksandrov Cc: "David

[PATCH] dma-buf: Wait on the reservation object when sync'ing before CPU access

2016-06-21 Thread Chris Wilson
ess, which should include waiting upon rendering. (Some drivers may need to do more work to ensure that the dma-buf mmap is coherent as well as complete.) Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Daniel Vetter Cc: linux-media@vger.kernel.org Cc: dri-de...@lists.freedesktop.org Cc: linaro

[PATCH] dma-buf: Release module reference on creation failure

2016-03-31 Thread Chris Wilson
If we fail to create the anon file, we need to remember to release the module reference on the owner. Signed-off-by: Chris Wilson Cc: Sumit Semwal Cc: Daniel Vetter Cc: linux-media@vger.kernel.org Cc: dri-de...@lists.freedesktop.org Cc: linaro-mm-...@lists.linaro.org --- drivers/dma-buf/dma

Re: [PATCH] dma-buf: Update docs for SYNC ioctl

2016-03-23 Thread Chris Wilson
On Wed, Mar 23, 2016 at 04:32:59PM +0100, David Herrmann wrote: > Hi > > On Wed, Mar 23, 2016 at 12:56 PM, Chris Wilson > wrote: > > On Wed, Mar 23, 2016 at 12:30:42PM +0100, David Herrmann wrote: > >> My question was rather about why we do this? Semantics for EINTR

Re: [PATCH] dma-buf: Update docs for SYNC ioctl

2016-03-23 Thread Chris Wilson
eir flush. There are a few other possible deadlocks that are also avoided with EAGAIN (again, the issue is more or less the lack of fine grained locking). -Chris -- Chris Wilson, Intel Open Source Technology Centre -- To unsubscribe from this list: send the line "unsubscribe linux-medi

[PATCH] dma-buf,drm,ion: Propagate error code from dma_buf_start_cpu_access()

2016-03-19 Thread Chris Wilson
c11e391da2a8fe973c3c2398452000bed505851e Author: Daniel Vetter Date: Thu Feb 11 20:04:51 2016 -0200 dma-buf: Add ioctls to allow userspace to flush Testcase: igt/gem_concurrent_blit/*dmabuf*interruptible Testcase: igt/prime_mmap_coherency/ioctl-errors Signed-off-by: Chris Wilson Cc: Tiago Vignatti Cc

Re: [Linaro-mm-sig] [PATCH 2/3] dma-buf: add support for kernel cpu access

2012-03-02 Thread Chris Wilson
a_buf->ops->begin_cpu_access() becomes mandatory as at a minimum it has to point to the default implementation. -Chris -- Chris Wilson, Intel Open Source Technology Centre -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html

Re: Kernel Display and Video API Consolidation mini-summit at ELC 2012 - Notes

2012-02-22 Thread Chris Wilson
For example: https://bugs.freedesktop.org/attachment.cgi?id=48933 which doesn't handle flushing of pending updates via the GPU when writing with the CPU during interrupts (i.e. a panic). -Chris -- Chris Wilson, Intel Open Source Technology Centre -- To unsubscribe from this list: send the