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List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On Wed, Feb 11, 2026 at 11:41:59AM +0100, Thomas Hellström wrote: > With commit > a69d1ab971a6 ("mm: Fix a hmm_range_fault() livelock / starvation problem") > device-to-device migration is not functional again and the > disabling can be reverted. > > Add the above commit as a Fixes: tag in order for the revert to not > take place unless that commit is present. > > This reverts commit 10dd1eaa80a56d3cf6d7c36b5269c8fed617f001. > > Cc: Matthew Brost Reviewed-by: Matthew Brost > Fixes: a69d1ab971a6 ("mm: Fix a hmm_range_fault() livelock / starvation problem") > Signed-off-by: Thomas Hellström > --- > drivers/gpu/drm/drm_pagemap.c | 14 ++------------ > 1 file changed, 2 insertions(+), 12 deletions(-) > > diff --git a/drivers/gpu/drm/drm_pagemap.c b/drivers/gpu/drm/drm_pagemap.c > index 38eca94f01a1..73438ba275bc 100644 > --- a/drivers/gpu/drm/drm_pagemap.c > +++ b/drivers/gpu/drm/drm_pagemap.c > @@ -480,18 +480,8 @@ int drm_pagemap_migrate_to_devmem(struct drm_pagemap_devmem *devmem_allocation, > .start = start, > .end = end, > .pgmap_owner = pagemap->owner, > - /* > - * FIXME: MIGRATE_VMA_SELECT_DEVICE_PRIVATE intermittently > - * causes 'xe_exec_system_allocator --r *race*no*' to trigger aa > - * engine reset and a hard hang due to getting stuck on a folio > - * lock. This should work and needs to be root-caused. The only > - * downside of not selecting MIGRATE_VMA_SELECT_DEVICE_PRIVATE > - * is that device-to-device migrations won’t work; instead, > - * memory will bounce through system memory. This path should be > - * rare and only occur when the madvise attributes of memory are > - * changed or atomics are being used. > - */ > - .flags = MIGRATE_VMA_SELECT_SYSTEM | MIGRATE_VMA_SELECT_DEVICE_COHERENT, > + .flags = MIGRATE_VMA_SELECT_SYSTEM | MIGRATE_VMA_SELECT_DEVICE_COHERENT | > + MIGRATE_VMA_SELECT_DEVICE_PRIVATE, > }; > unsigned long i, npages = npages_in_range(start, end); > unsigned long own_pages = 0, migrated_pages = 0; > -- > 2.52.0 >