+ hugetlbfs-use-pagevec_lookup_range-in-remove_inode_hugepages.patch added to -mm tree

+ hugetlbfs-use-pagevec_lookup_range-in-remove_inode_hugepages.patch added to -mm tree

[akpm]

The patch titled
     Subject: hugetlbfs: use pagevec_lookup_range() in remove_inode_hugepages()
has been added to the -mm tree.  Its filename is
     hugetlbfs-use-pagevec_lookup_range-in-remove_inode_hugepages.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/hugetlbfs-use-pagevec_lookup_range-in-remove_inode_hugepages.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/hugetlbfs-use-pagevec_lookup_range-in-remove_inode_hugepages.patch

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------------------------------------------------------
From: Jan Kara <jack@suse.cz>
Subject: hugetlbfs: use pagevec_lookup_range() in remove_inode_hugepages()

We want only pages from given range in remove_inode_hugepages().  Use
pagevec_lookup_range() instead of pagevec_lookup().

Link: http://lkml.kernel.org/r/20170726114704.7626-8-jack@suse.cz
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: Nadia Yvette Chambers <nyc@holomorphy.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/hugetlbfs/inode.c |   18 ++----------------
 1 file changed, 2 insertions(+), 16 deletions(-)

diff -puN fs/hugetlbfs/inode.c~hugetlbfs-use-pagevec_lookup_range-in-remove_inode_hugepages fs/hugetlbfs/inode.c
--- a/fs/hugetlbfs/inode.c~hugetlbfs-use-pagevec_lookup_range-in-remove_inode_hugepages
+++ a/fs/hugetlbfs/inode.c
@@ -403,7 +403,6 @@ static void remove_inode_hugepages(struc
 	struct pagevec pvec;
 	pgoff_t next, index;
 	int i, freed = 0;
-	long lookup_nr = PAGEVEC_SIZE;
 	bool truncate_op = (lend == LLONG_MAX);
 
 	memset(&pseudo_vma, 0, sizeof(struct vm_area_struct));
@@ -412,30 +411,17 @@ static void remove_inode_hugepages(struc
 	next = start;
 	while (next < end) {
 		/*
-		 * Don't grab more pages than the number left in the range.
-		 */
-		if (end - next < lookup_nr)
-			lookup_nr = end - next;
-
-		/*
 		 * When no more pages are found, we are done.
 		 */
-		if (!pagevec_lookup(&pvec, mapping, &next, lookup_nr))
+		if (!pagevec_lookup_range(&pvec, mapping, &next, end - 1,
+					  PAGEVEC_SIZE))
 			break;
 
 		for (i = 0; i < pagevec_count(&pvec); ++i) {
 			struct page *page = pvec.pages[i];
 			u32 hash;
 
-			/*
-			 * The page (index) could be beyond end.  This is
-			 * only possible in the punch hole case as end is
-			 * max page offset in the truncate case.
-			 */
 			index = page->index;
-			if (index >= end)
-				break;