0f633baac0
Add :collapse mod to userfaultfd selftest. Currently this mod is only valid for "shmem" test type, but could be used for other test types. When provided, memory allocated by ->allocate_area() will be hugepage-aligned enforced to be hugepage-sized. userfaultf_minor_test, after the UFFD-registered mapping has been populated by UUFD minor fault handler, attempt to MADV_COLLAPSE the UFFD-registered mapping to collapse the memory into a pmd-mapped THP. This test is meant to be a functional test of what occurs during UFFD-driven live migration of VMs backed by huge tmpfs where, after a hugepage-sized region has been successfully migrated (in native page-sized chunks, to avoid latency of fetched a hugepage over the network), we want to reclaim previous VM performance by remapping it at the PMD level. Link: https://lkml.kernel.org/r/20220907144521.3115321-11-zokeefe@google.com Link: https://lkml.kernel.org/r/20220922224046.1143204-11-zokeefe@google.com Signed-off-by: Zach O'Keefe <zokeefe@google.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Chris Kennelly <ckennelly@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: James Houghton <jthoughton@google.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Peter Xu <peterx@redhat.com> Cc: Rongwei Wang <rongwei.wang@linux.alibaba.com> Cc: SeongJae Park <sj@kernel.org> Cc: Song Liu <songliubraving@fb.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Yang Shi <shy828301@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| crypto/chacha20-s390 | ||
| cxl | ||
| fault-injection | ||
| ktest | ||
| kunit | ||
| memblock | ||
| nvdimm | ||
| radix-tree | ||
| scatterlist | ||
| selftests | ||
| vsock | ||