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| author | Zi Yan <zi.yan@cs.rutgers.edu> | 2017-10-13 15:57:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-13 16:18:32 -0700 |
| commit | af0db981f35ea99b00a0b249bf0bedef8cf972e8 (patch) | |
| tree | 7ad609d0549cc64a4c6763da52793d4464fe0e9b | |
| parent | de55c8b251974247edda38e952da8e8dd71683ec (diff) | |
| download | linux-af0db981f35ea99b00a0b249bf0bedef8cf972e8.tar.gz linux-af0db981f35ea99b00a0b249bf0bedef8cf972e8.tar.bz2 linux-af0db981f35ea99b00a0b249bf0bedef8cf972e8.zip | |
mm: remove unnecessary WARN_ONCE in page_vma_mapped_walk().
A non present pmd entry can appear after pmd_lock is taken in
page_vma_mapped_walk(), even if THP migration is not enabled. The
WARN_ONCE is unnecessary.
Link: http://lkml.kernel.org/r/20171003142606.12324-1-zi.yan@sent.com
Fixes: 616b8371539a ("mm: thp: enable thp migration in generic path")
Signed-off-by: Zi Yan <zi.yan@cs.rutgers.edu>
Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Tested-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/page_vma_mapped.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c index 6a03946469a9..eb462e7db0a9 100644 --- a/mm/page_vma_mapped.c +++ b/mm/page_vma_mapped.c @@ -167,8 +167,7 @@ restart: return not_found(pvmw); return true; } - } else - WARN_ONCE(1, "Non present huge pmd without pmd migration enabled!"); + } return not_found(pvmw); } else { /* THP pmd was split under us: handle on pte level */ |