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-rw-r--r--mm/readahead.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index e273f0de3376..9f62b7151100 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -19,6 +19,7 @@
#include <linux/syscalls.h>
#include <linux/file.h>
#include <linux/mm_inline.h>
+#include <linux/blk-cgroup.h>
#include "internal.h"
@@ -505,6 +506,9 @@ void page_cache_sync_readahead(struct address_space *mapping,
if (!ra->ra_pages)
return;
+ if (blk_cgroup_congested())
+ return;
+
/* be dumb */
if (filp && (filp->f_mode & FMODE_RANDOM)) {
force_page_cache_readahead(mapping, filp, offset, req_size);
@@ -555,6 +559,9 @@ page_cache_async_readahead(struct address_space *mapping,
if (inode_read_congested(mapping->host))
return;
+ if (blk_cgroup_congested())
+ return;
+
/* do read-ahead */
ondemand_readahead(mapping, ra, filp, true, offset, req_size);
}