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Ross Zwisler
44f649f632
This adds a regression test for the following kernel patches: mm: avoid spurious 'bad pmd' warning messages dax: Fix race between colliding PMD & PTE entries The above patches fix two related PMD vs PTE races in the DAX code. These can both be easily triggered by having two threads reading and writing simultaneously to the same private mapping, with the key being that private mapping reads can be handled with PMDs but private mapping writes are always handled with PTEs so that we can COW. Without this 2-patch kernel series, the newly added test will result in the following errors: run fstests generic/437 at 2017-05-16 16:53:43 mm/pgtable-generic.c:39: bad pmd ffff8808daa49b88(84000001006000a5) ... a bunch of the bad pmd messages ... BUG: Bad rss-counter state mm:ffff8800a8c1b700 idx:1 val:1 BUG: non-zero nr_ptes on freeing mm: 38 XFS (pmem0p1): Unmounting Filesystem Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
3 lines
43 B
Plaintext
3 lines
43 B
Plaintext
QA output created by 437
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