From 72e2936c04f7d2a4bf87d7f72d3bf11cf91ebb47 Mon Sep 17 00:00:00 2001 From: zhong jiang Date: Fri, 7 Oct 2016 17:02:01 -0700 Subject: mm: remove unnecessary condition in remove_inode_hugepages When the huge page is added to the page cahce (huge_add_to_page_cache), the page private flag will be cleared. since this code (remove_inode_hugepages) will only be called for pages in the page cahce, PagePrivate(page) will always be false. The patch remove the code without any functional change. Link: http://lkml.kernel.org/r/1475113323-29368-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang Reviewed-by: Naoya Horiguchi Reviewed-by: Mike Kravetz Tested-by: Mike Kravetz Acked-by: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/hugetlbfs/inode.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) (limited to 'fs/hugetlbfs/inode.c') diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 4ea71eba40a5..7337cac29e9e 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -416,7 +416,6 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart, for (i = 0; i < pagevec_count(&pvec); ++i) { struct page *page = pvec.pages[i]; - bool rsv_on_error; u32 hash; /* @@ -458,18 +457,17 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart, * cache (remove_huge_page) BEFORE removing the * region/reserve map (hugetlb_unreserve_pages). In * rare out of memory conditions, removal of the - * region/reserve map could fail. Before free'ing - * the page, note PagePrivate which is used in case - * of error. + * region/reserve map could fail. Correspondingly, + * the subpool and global reserve usage count can need + * to be adjusted. */ - rsv_on_error = !PagePrivate(page); + VM_BUG_ON(PagePrivate(page)); remove_huge_page(page); freed++; if (!truncate_op) { if (unlikely(hugetlb_unreserve_pages(inode, next, next + 1, 1))) - hugetlb_fix_reserve_counts(inode, - rsv_on_error); + hugetlb_fix_reserve_counts(inode); } unlock_page(page); -- cgit v1.2.3