Am 27.10.21 um 16:47 schrieb Andrey Grodzovsky:
On 2021-10-27 10:34 a.m., Christian König wrote:
Am 27.10.21 um 16:27 schrieb Andrey Grodzovsky:
[SNIP]
Let me please know if I am still missing some point of yours.
Well, I mean we need to be able to handle this for all drivers.
For sure, but as i said above in my opinion we need to change only
for those drivers that don't use the _locked version.
And that absolutely won't work.
See the dma_fence is a contract between drivers, so you need the same
calling convention between all drivers.
Either we always call the callback with the lock held or we always
call it without the lock, but sometimes like that and sometimes
otherwise won't work.
Christian.
I am not sure I fully understand what problems this will cause but
anyway, then we are back to irq_work. We cannot embed irq_work as
union within dma_fenc's cb_list
because it's already reused as timestamp and as rcu head after the
fence is signaled. So I will do it within drm_scheduler with single
irq_work per drm_sched_entity
as we discussed before.
That won't work either. We free up the entity after the cleanup
function. That's the reason we use the callback on the job in the first
place.
We could overlead the cb structure in the job though.
Christian.
Andrey
Andrey
