]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mm/hugeltb: handle the error case in hugetlb_fix_reserve_counts()
authorMiaohe Lin <linmiaohe@huawei.com>
Wed, 5 May 2021 01:34:38 +0000 (18:34 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 5 May 2021 18:27:21 +0000 (11:27 -0700)
commitda56388c4397878a65b74f7fe97760f5aa7d316b
tree801df6ed6c43b541b84f21e152252f0f09a343a3
parentdddf31a49a0eb858bba58876c3c67dd8ea81b800
mm/hugeltb: handle the error case in hugetlb_fix_reserve_counts()

A rare out of memory error would prevent removal of the reserve map region
for a page.  hugetlb_fix_reserve_counts() handles this rare case to avoid
dangling with incorrect counts.  Unfortunately, hugepage_subpool_get_pages
and hugetlb_acct_memory could possibly fail too.  We should correctly
handle these cases.

Link: https://lkml.kernel.org/r/20210410072348.20437-5-linmiaohe@huawei.com
Fixes: b5cec28d36f5 ("hugetlbfs: truncate_hugepages() takes a range of pages")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Feilong Lin <linfeilong@huawei.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/hugetlb.c