On 2/17/26 10:29 AM, Christian König wrote:
On 2/13/26 13:08, Yicong Hui wrote:
Add DRM_IOCTL_SYNCOBJ_QUERY_ERROR to allow userspace to query the error
status of a fence held by a timeline/binary syncobj.
Not bad for a first try, but quite a bunch of general comments.
First of all to get that merged you need to point out a Mesa merge request
where this interface is actually used in userspace, so that we can look at the
full solution.
My educated guess is that userspace doesn't want to call this IOCTL separately
because of performance reasons.
Instead add some additional flag to DRM_SYNCOBJ_WAIT_FLAGS_* so that the IOCTL
aborts the wait and returns an error as soon as it sees any fence with an error.
Another DRM_SYNCOBJ_QUERY_FLAGS_* is potentially also useful to query the error
on a number of drm_syncobjs at the same time.
But in general since this is not a HW feature the userspace developers need to
voice their requirements and explain how they want to have that implemented.
So adding Michel on CC, I've briefly discussed that topic with him on XDC last
year.
Thanks,
Christian.
Hi, thank you for the feedback! :D
Shall I just wait for Michel's input on what interface would work best for Mesa?
Thank you!
-Yicong
