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-rw-r--r--mm/filemap.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index e5131392d32e..68e782b3d3de 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1559,8 +1559,7 @@ static void do_sync_mmap_readahead(struct vm_area_struct *vma,
if (!ra->ra_pages)
return;
- if (VM_SequentialReadHint(vma) ||
- offset - 1 == (ra->prev_pos >> PAGE_CACHE_SHIFT)) {
+ if (VM_SequentialReadHint(vma)) {
page_cache_sync_readahead(mapping, ra, file, offset,
ra->ra_pages);
return;
@@ -1583,7 +1582,7 @@ static void do_sync_mmap_readahead(struct vm_area_struct *vma,
ra_pages = max_sane_readahead(ra->ra_pages);
ra->start = max_t(long, 0, offset - ra_pages / 2);
ra->size = ra_pages;
- ra->async_size = 0;
+ ra->async_size = ra_pages / 4;
ra_submit(ra, mapping, file);
}
@@ -1689,7 +1688,6 @@ retry_find:
return VM_FAULT_SIGBUS;
}
- ra->prev_pos = (loff_t)offset << PAGE_CACHE_SHIFT;
vmf->page = page;
return ret | VM_FAULT_LOCKED;