The patch titled
Subject: powerpc: gup_hugepte() avoid to free the head page too many times
has been added to the -mm tree. Its filename is
powerpc-gup_hugepte-avoid-to-free-the-head-page-too-many-times.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Subject: powerpc: gup_hugepte() avoid to free the head page too many times
We only taken "refs" pins on the head page not "*nr" pins.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Johannes Weiner <jweiner@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxx>
---
arch/powerpc/mm/hugetlbpage.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff -puN arch/powerpc/mm/hugetlbpage.c~powerpc-gup_hugepte-avoid-to-free-the-head-page-too-many-times arch/powerpc/mm/hugetlbpage.c
--- a/arch/powerpc/mm/hugetlbpage.c~powerpc-gup_hugepte-avoid-to-free-the-head-page-too-many-times
+++ a/arch/powerpc/mm/hugetlbpage.c
@@ -652,10 +652,9 @@ static noinline int gup_hugepte(pte_t *p
if (unlikely(pte_val(pte) != pte_val(*ptep))) {
/* Could be optimized better */
- while (*nr) {
+ *nr -= refs;
+ while (refs--)
put_page(head);
- (*nr)--;
- }
}
return 1;
_
Subject: Subject: powerpc: gup_hugepte() avoid to free the head page too many times
Patches currently in -mm which might be from aarcange@xxxxxxxxxx are
mm-compaction-trivial-clean-up-in-acct_isolated.patch
mm-change-isolate-mode-from-define-to-bitwise-type.patch
mm-compaction-make-isolate_lru_page-filter-aware.patch
mm-compaction-make-isolate_lru_page-filter-aware-fix.patch
mm-zone_reclaim-make-isolate_lru_page-filter-aware.patch
mm-zone_reclaim-make-isolate_lru_page-filter-aware-fix.patch
mm-migration-clean-up-unmap_and_move.patch
mremap-check-for-overflow-using-deltas.patch
mremap-avoid-sending-one-ipi-per-page.patch
thp-mremap-support-and-tlb-optimization.patch
thp-mremap-support-and-tlb-optimization-fix.patch
thp-mremap-support-and-tlb-optimization-fix-fix.patch
thp-mremap-support-and-tlb-optimization-fix-fix-fix.patch
thp-tail-page-refcounting-fix-5.patch
powerpc-remove-superfluous-pagetail-checks-on-the-pte-gup_fast.patch
powerpc-get_hugepte-dont-put_page-the-wrong-page.patch
powerpc-gup_hugepte-avoid-to-free-the-head-page-too-many-times.patch
powerpc-gup_hugepte-support-thp-based-tail-recounting.patch
mm-mempolicyc-quiet-sparse-noise.patch
mm-huge_memoryc-quiet-sparse-noise.patch
vmscan-limit-direct-reclaim-for-higher-order-allocations.patch
vmscan-limit-direct-reclaim-for-higher-order-allocations-fix.patch
vmscan-abort-reclaim-compaction-if-compaction-can-proceed.patch
mm-huge_memory-fix-copying-user-highpage.patch
mm-huge_memory-fix-typo-when-updating-mmu-cache.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
