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authorOak Zeng <oak.zeng@intel.com>2024-12-03 05:19:29 +0300
committerRodrigo Vivi <rodrigo.vivi@intel.com>2024-12-06 18:54:34 +0300
commit774b5fa509a97017715801739111a42fdc23d590 (patch)
tree80fcbff51ac2e613e0450bf793b73f8d033707d8 /tools/perf/scripts/python/export-to-postgresql.py
parenta16e1551dc57d0192668c9ded42d8274c6e66b0a (diff)
downloadlinux-774b5fa509a97017715801739111a42fdc23d590.tar.xz
drm/xe: Avoid evicting object of the same vm in none fault mode
BO validation during vm_bind could trigger memory eviction when system runs under memory pressure. Right now we blindly evict BOs of all VMs. This scheme has a problem when system runs in none recoverable page fault mode: even though the vm_bind could be successful by evicting BOs, the later the rebinding of the evicted BOs would fail. So it is better to report an out-of- memory failure at vm_bind time than at time of rebinding where xekmd currently doesn't have a good mechanism to report error to user space. This patch implemented a scheme to only evict objects of other VMs during vm_bind time. Object of the same VM will skip eviction. If we failed to find enough memory for vm_bind, we report error to user space at vm_bind time. This scheme is not needed for recoverable page fault mode under what we can dynamically fault-in pages on demand. v1: Use xe_vm_in_preempt_fence_mode instead of stack variable (Thomas) Signed-off-by: Oak Zeng <oak.zeng@intel.com> Suggested-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241203021929.1919730-1-oak.zeng@intel.com Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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