Displaying 2 results from an estimated 2 matches for "find_get_mmu_notifier".
2020 Mar 03
1
[PATCH v2] nouveau/hmm: map pages after migration
...mas for the address range given in the ioctl() data, and migrates
the pages to the GPU memory.
mmu_notifier_get() would try to lock mmap_sem for writing so that would deadlock.
But it is similar in that the GPU specific process context (nouveau_svmm) needs
to be found for the given ioctl caller.
If find_get_mmu_notifier() was exported, I think that could work.
Now that I look at this again, there is an easier way to find the svmm and I see
some other bugs that need fixing. I'll post a v3 as soon as I get those written
and tested.
Thanks for the review.
2020 Mar 03
2
[PATCH v2] nouveau/hmm: map pages after migration
When memory is migrated to the GPU, it is likely to be accessed by GPU
code soon afterwards. Instead of waiting for a GPU fault, map the
migrated memory into the GPU page tables with the same access permissions
as the source CPU page table entries. This preserves copy on write
semantics.
Signed-off-by: Ralph Campbell <rcampbell at nvidia.com>
Cc: Christoph Hellwig <hch at lst.de>
Cc: