The patch titled
Subject: mm/hugetlb: handle races in alloc_huge_page and hugetlb_reserve_pages
has been added to the -mm tree. Its filename is
mm-hugetlb-handle-races-in-alloc_huge_page-and-hugetlb_reserve_pages-v4.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-handle-races-in-alloc_huge_page-and-hugetlb_reserve_pages-v4.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-handle-races-in-alloc_huge_page-and-hugetlb_reserve_pages-v4.patch
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------------------------------------------------------
From: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Subject: mm/hugetlb: handle races in alloc_huge_page and hugetlb_reserve_pages
Reserve count adjustments need to take into account hugetlbfs min_size
reservation pools
Signed-off-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Luiz Capitulino <lcapitulino@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff -puN mm/hugetlb.c~mm-hugetlb-handle-races-in-alloc_huge_page-and-hugetlb_reserve_pages-v4 mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-handle-races-in-alloc_huge_page-and-hugetlb_reserve_pages-v4
+++ a/mm/hugetlb.c
@@ -1594,8 +1594,10 @@ static struct page *alloc_huge_page(stru
* the reservation count added in hugetlb_reserve_pages
* no longer applies.
*/
- hugepage_subpool_put_pages(spool, 1);
- hugetlb_acct_memory(h, -1);
+ long rsv_adjust;
+
+ rsv_adjust = hugepage_subpool_put_pages(spool, 1);
+ hugetlb_acct_memory(h, -rsv_adjust);
}
return page;
@@ -3725,8 +3727,11 @@ int hugetlb_reserve_pages(struct inode *
* the subpool and reserve counts modified above
* based on the difference.
*/
- hugepage_subpool_put_pages(spool, chg - add);
- hugetlb_acct_memory(h, -(chg - ret));
+ long rsv_adjust;
+
+ rsv_adjust = hugepage_subpool_put_pages(spool,
+ chg - add);
+ hugetlb_acct_memory(h, -rsv_adjust);
}
}
return 0;
_
Patches currently in -mm which might be from mike.kravetz@xxxxxxxxxx are
hugetlb-do-not-account-hugetlb-pages-as-nr_file_pages.patch
mm-hugetlb-document-the-reserve-map-region-tracking-routines.patch
mm-hugetlb-compute-return-the-number-of-regions-added-by-region_add.patch
mm-hugetlb-handle-races-in-alloc_huge_page-and-hugetlb_reserve_pages.patch
mm-hugetlb-handle-races-in-alloc_huge_page-and-hugetlb_reserve_pages-v4.patch
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