The patch titled
mm-share-pg_readahead-and-pg_reclaim fix
has been added to the -mm tree. Its filename is
mm-share-pg_readahead-and-pg_reclaim-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm-share-pg_readahead-and-pg_reclaim fix
From: Fengguang Wu <wfg@xxxxxxxxxxxxxxxx>
We should first check (page!=NULL) before PageWriteback(page).
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/readahead.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff -puN mm/readahead.c~mm-share-pg_readahead-and-pg_reclaim-fix mm/readahead.c
--- a/mm/readahead.c~mm-share-pg_readahead-and-pg_reclaim-fix
+++ a/mm/readahead.c
@@ -447,11 +447,13 @@ page_cache_readahead_ondemand(struct add
if (!ra->ra_pages)
return 0;
- /* It's PG_reclaim! */
- if (PageWriteback(page))
- return 0;
-
if (page) {
+ /*
+ * It can be PG_reclaim.
+ */
+ if (PageWriteback(page))
+ return 0;
+
ClearPageReadahead(page);
/*
_
Patches currently in -mm which might be from wfg@xxxxxxxxxxxxxxxx are
readahead-introduce-pg_readahead.patch
readahead-add-look-ahead-support-to-__do_page_cache_readahead.patch
readahead-min_ra_pages-max_ra_pages-macros.patch
readahead-data-structure-and-routines.patch
readahead-on-demand-readahead-logic.patch
readahead-convert-filemap-invocations.patch
readahead-convert-splice-invocations.patch
readahead-convert-ext3-ext4-invocations.patch
readahead-remove-the-old-algorithm.patch
mm-share-pg_readahead-and-pg_reclaim.patch
mm-share-pg_readahead-and-pg_reclaim-fix.patch
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