The patch titled
readahead: remove one unnecessary radix tree lookup
has been added to the -mm tree. Its filename is
readahead-remove-one-unnecessary-radix-tree-lookup.patch
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------------------------------------------------------
Subject: readahead: remove one unnecessary radix tree lookup
From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
(hit_readahead_marker != 0) means the page at @offset is present, so we
can search for non-present page starting from @offset+1.
Reported-by: Xu Chenfeng <xcf@xxxxxxxxxxx>
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Ying Han <yinghan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/readahead.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/readahead.c~readahead-remove-one-unnecessary-radix-tree-lookup mm/readahead.c
--- a/mm/readahead.c~readahead-remove-one-unnecessary-radix-tree-lookup
+++ a/mm/readahead.c
@@ -395,7 +395,7 @@ ondemand_readahead(struct address_space
pgoff_t start;
rcu_read_lock();
- start = radix_tree_next_hole(&mapping->page_tree, offset,max+1);
+ start = radix_tree_next_hole(&mapping->page_tree, offset+1,max);
rcu_read_unlock();
if (!start || start - offset > max)
_
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
linux-next.patch
readahead-make-mmap_miss-an-unsigned-int.patch
readahead-move-max_sane_readahead-calls-into-force_page_cache_readahead.patch
readahead-apply-max_sane_readahead-limit-in-ondemand_readahead.patch
readahead-remove-one-unnecessary-radix-tree-lookup.patch
readahead-increase-interleaved-readahead-size.patch
readahead-remove-sync-async-readahead-call-dependency.patch
readahead-clean-up-and-simplify-the-code-for-filemap-page-fault-readahead.patch
readahead-sequential-mmap-readahead.patch
readahead-enforce-full-readahead-size-on-async-mmap-readahead.patch
readahead-record-mmap-read-around-states-in-file_ra_state.patch
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