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authorHyunchul Lee <cheol.lee@lge.com>2017-06-14 09:31:49 +0900
committerRichard Weinberger <richard@nod.at>2017-07-14 22:50:50 +0200
commit480a1a6a3ef6fb6be4cd2f37b34314fbf64867dd (patch)
treefba67215aa3a99176334885fd6774003bd11e43a
parentubifs: Fix oops when remounting with no_bulk_read. (diff)
downloadlinux-dev-480a1a6a3ef6fb6be4cd2f37b34314fbf64867dd.tar.xz
linux-dev-480a1a6a3ef6fb6be4cd2f37b34314fbf64867dd.zip
ubifs: Change gfp flags in page allocation for bulk read
In low memory situations, page allocations for bulk read can kill applications for reclaiming memory, and print an failure message when allocations are failed. Because bulk read is just an optimization, we don't have to do these and can stop page allocations. Though this siutation happens rarely, add __GFP_NORETRY to prevent from excessive memory reclaim and killing applications, and __GFP_WARN to suppress this failure message. For this, Use readahead_gfp_mask for gfp flags when allocating pages. Signed-off-by: Hyunchul Lee <cheol.lee@lge.com> Signed-off-by: Richard Weinberger <richard@nod.at>
-rw-r--r--fs/ubifs/file.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index c58efc1470f3..8cad0b19b404 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -735,6 +735,7 @@ static int ubifs_do_bulk_read(struct ubifs_info *c, struct bu_info *bu,
int err, page_idx, page_cnt, ret = 0, n = 0;
int allocate = bu->buf ? 0 : 1;
loff_t isize;
+ gfp_t ra_gfp_mask = readahead_gfp_mask(mapping) & ~__GFP_FS;
err = ubifs_tnc_get_bu_keys(c, bu);
if (err)
@@ -796,8 +797,7 @@ static int ubifs_do_bulk_read(struct ubifs_info *c, struct bu_info *bu,
if (page_offset > end_index)
break;
- page = find_or_create_page(mapping, page_offset,
- GFP_NOFS | __GFP_COLD);
+ page = find_or_create_page(mapping, page_offset, ra_gfp_mask);
if (!page)
break;
if (!PageUptodate(page))