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Resurrect readahead-2.6.32.patch under name readahead-2.6.32.below11.patch and update README that it was included in 2.6.32.11.

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1658 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2010-04-27 16:52:15 +00:00
parent 1c21b1ffb8
commit af79b95d49
2 changed files with 14 additions and 1 deletions
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3
scst/README
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@@ -83,7 +83,8 @@ scst_exec_req_fifo-2.6.X.patch.
2. readahead-2.6.X.patch. This patch fixes problem in Linux readahead
subsystem and greatly improves performance for software RAIDs. See
http://sourceforge.net/mailarchive/forum.php?thread_name=a0272b440906030714g67eabc5k8f847fb1e538cc62%40mail.gmail.com&forum_name=scst-devel
thread for more details. It is included in the mainstream kernel 2.6.33.
thread for more details. It is included in the mainstream kernels 2.6.33
and 2.6.32.11.
3. readahead-context-2.6.X.patch. This is backported from 2.6.31 version
of the context readahead patch http://lkml.org/lkml/2009/4/12/9, big

12
scst/kernel/readahead-2.6.32.below11.patch Normal file
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@@ -0,0 +1,12 @@
diff -upkr linux-2.6.32.1/mm/readahead.c linux-2.6.32.1/mm/readahead.c
--- linux-2.6.32.1/mm/readahead.c 2009-12-03 06:51:21.000000000 +0300
+++ linux-2.6.32.1/mm/readahead.c 2009-12-16 15:21:00.000000000 +0300
@@ -547,5 +547,8 @@ page_cache_async_readahead(struct addres
/* do read-ahead */
ondemand_readahead(mapping, ra, filp, true, offset, req_size);
+
+ if (PageUptodate(page))
+ blk_run_backing_dev(mapping->backing_dev_info, NULL);
}
EXPORT_SYMBOL_GPL(page_cache_async_readahead);