1 files changed, 6 insertions, 3 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index cbea95a25283..07f5b77114a3 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -868,6 +868,7 @@ void do_generic_mapping_read(struct address_space *mapping,
         unsigned long last_index;
         unsigned long next_index;
         unsigned long prev_index;
+        unsigned int prev_offset;
         loff_t isize;
         struct page *cached_page;
         int error;
@@ -877,6 +878,7 @@ void do_generic_mapping_read(struct address_space *mapping,
         index = *ppos >> PAGE_CACHE_SHIFT;
         next_index = index;
         prev_index = ra.prev_page;
+        prev_offset = ra.offset;
         last_index = (*ppos + desc->count + PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT;
         offset = *ppos & ~PAGE_CACHE_MASK;
 
@@ -924,10 +926,10 @@ page_ok:
                         flush_dcache_page(page);
 
                 /*
-                 * When (part of) the same page is read multiple times
-                 * in succession, only mark it as accessed the first time.
+                 * When a sequential read accesses a page several times,
+                 * only mark it as accessed the first time.
                  */
-                if (prev_index != index)
+                if (prev_index != index || offset != prev_offset)
                         mark_page_accessed(page);
                 prev_index = index;
 
@@ -945,6 +947,7 @@ page_ok:
                 offset += ret;
                 index += offset >> PAGE_CACHE_SHIFT;
                 offset &= ~PAGE_CACHE_MASK;
+                prev_offset = ra.offset = offset;
 
                 page_cache_release(page);
                 if (ret == nr && desc->count)