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authorChris Wilson <chris@chris-wilson.co.uk>2019-06-04 18:38:30 +0300
committerChris Wilson <chris@chris-wilson.co.uk>2019-06-04 22:51:46 +0300
commit1d1b5490b91c932a75188e9acf76ead68d6e9741 (patch)
tree5cbd4c331e2f3018127c7ca4d5e5a2642705c3b1 /crypto/crct10dif_common.c
parent59ec84eca57ab33107f1cd712a183ff5f9e234d8 (diff)
downloadlinux-1d1b5490b91c932a75188e9acf76ead68d6e9741.tar.xz
drm/i915/gtt: Replace struct_mutex serialisation for allocation
Instead of relying on the caller holding struct_mutex across the allocation, push the allocation under a tree of spinlocks stored inside the page tables. Not only should this allow us to avoid struct_mutex here, but it will allow multiple users to lock independent ranges for concurrent allocations, and operate independently. This is vital for pushing the GTT manipulation into a background thread where dependency on struct_mutex is verboten, and for allowing other callers to avoid struct_mutex altogether. v2: Restore lost GEM_BUG_ON for removing too many PTE from gen6_ppgtt_clear_range. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Matthew Auld <matthew.auld@intel.com> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Acked-by: Mika Kuoppala <mika.kuoppala@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190604153830.19096-1-chris@chris-wilson.co.uk
Diffstat (limited to 'crypto/crct10dif_common.c')
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