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| author | Peter Xu <peterx@redhat.com> | 2022-10-04 22:34:00 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-13 04:51:50 +0300 |
| commit | 26c92d37d3dc484157bdb4eb7d29991c017b168b (patch) | |
| tree | 8315ac0af29354c34602ad71f21948f1b53b50da /mm/page_alloc.c | |
| parent | f9bf6c03eca1077cae8de0e6d86427656fa42a9b (diff) | |
| download | linux-26c92d37d3dc484157bdb4eb7d29991c017b168b.tar.xz | |
mm/selftest: uffd: explain the write missing fault check
It's not obvious why we had a write check for each of the missing
messages, especially when it should be a locking op. Add a rich comment
for that, and also try to explain its good side and limitations, so that
if someone hit it again for either a bug or a different glibc impl
there'll be some clue to start with.
Link: https://lkml.kernel.org/r/20221004193400.110155-4-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
0 files changed, 0 insertions, 0 deletions