[Intel-xe] [PATCH 2/6] drm/xe/migrate: Update cpu page-table updates

[Thomas Hellström]

On 3/14/23 13:15, Matthew Auld wrote:
> On Mon, 13 Mar 2023 at 20:46, Thomas Hellström
> <thomas.hellstrom at linux.intel.com> wrote:
>> Don't wait for GPU to be able to update page-tables using CPU. Putting
>> ourselves to sleep may be more of a problem than using GPU for
>> page-table updates. Also allow the vm to be NULL since the migrate
>> kunit test uses NULL for vm.
>>
>> Signed-off-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
> Seems reasonable to me, but I'm not really familiar with the history here,
> Reviewed-by: Matthew Auld <matthew.auld at intel.com>

Hmm, it turns out that this change uncovers a bug in xe_exec_basic igt 
(unless I misunderstand the syncobj semantics). I've posted a fix for 
that on igt-dev. With a little luck that also fixes the strange igt 
failures we've been seeing with deferred storage allocation on PVC.

I won't merge this until the igt fix goes in.

/Thomas