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MIGRATE_PFN_LOCKED is used to indicate to migrate_vma_prepare() that a source page was already locked during migrate_vma_collect(). If it wasn't then the a second attempt is made to lock the page. However if the first attempt failed it's unlikely a second attempt will succeed, and the retry adds complexity. So clean this up by removing the retry and MIGRATE_PFN_LOCKED flag. Destination pages are also meant to have the MIGRATE_PFN_LOCKED flag set, but nothing actually checks that. Link: https://lkml.kernel.org/r/20211025041608.289017-1-apopple@nvidia.com Signed-off-by: Alistair Popple <apopple@nvidia.com> Reviewed-by: Ralph Campbell <rcampbell@nvidia.com> Acked-by: Felix Kuehling <Felix.Kuehling@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Zi Yan <ziy@nvidia.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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damon | ||
.gitignore | ||
active_mm.rst | ||
arch_pgtable_helpers.rst | ||
balance.rst | ||
cleancache.rst | ||
free_page_reporting.rst | ||
frontswap.rst | ||
highmem.rst | ||
hmm.rst | ||
hugetlbfs_reserv.rst | ||
hwpoison.rst | ||
index.rst | ||
ksm.rst | ||
memory-model.rst | ||
mmu_notifier.rst | ||
numa.rst | ||
overcommit-accounting.rst | ||
page_frags.rst | ||
page_migration.rst | ||
page_owner.rst | ||
remap_file_pages.rst | ||
slub.rst | ||
split_page_table_lock.rst | ||
transhuge.rst | ||
unevictable-lru.rst | ||
z3fold.rst | ||
zsmalloc.rst |