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-rw-r--r--mm/readahead.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index 2648ec4f04..89139a8721 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -490,6 +490,7 @@ void page_cache_ra_order(struct readahead_control *ractl,
pgoff_t index = readahead_index(ractl);
pgoff_t limit = (i_size_read(mapping->host) - 1) >> PAGE_SHIFT;
pgoff_t mark = index + ra->size - ra->async_size;
+ unsigned int nofs;
int err = 0;
gfp_t gfp = readahead_gfp_mask(mapping);
@@ -506,6 +507,8 @@ void page_cache_ra_order(struct readahead_control *ractl,
new_order--;
}
+ /* See comment in page_cache_ra_unbounded() */
+ nofs = memalloc_nofs_save();
filemap_invalidate_lock_shared(mapping);
while (index <= limit) {
unsigned int order = new_order;
@@ -532,6 +535,7 @@ void page_cache_ra_order(struct readahead_control *ractl,
read_pages(ractl);
filemap_invalidate_unlock_shared(mapping);
+ memalloc_nofs_restore(nofs);
/*
* If there were already pages in the page cache, then we may have