From: Wu Fengguang <fengguang.wu@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Nick Piggin <npiggin@suse.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Wu Fengguang <fengguang.wu@intel.com>
Cc: Ying Han <yinghan@google.com>
Subject: [PATCH 2/9] readahead: apply max_sane_readahead() limit in ondemand_readahead()
Date: Fri, 10 Apr 2009 14:09:59 +0800 [thread overview]
Message-ID: <20090410061253.941738959@intel.com> (raw)
In-Reply-To: 20090410060957.442203404@intel.com
[-- Attachment #1: readahead-sane-max.patch --]
[-- Type: text/plain, Size: 627 bytes --]
Just in case someone aggressively set a huge readahead size.
Cc: Nick Piggin <npiggin@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
mm/readahead.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- mm.orig/mm/readahead.c
+++ mm/mm/readahead.c
@@ -357,7 +357,7 @@ ondemand_readahead(struct address_space
bool hit_readahead_marker, pgoff_t offset,
unsigned long req_size)
{
- int max = ra->ra_pages; /* max readahead pages */
+ unsigned long max = max_sane_readahead(ra->ra_pages);
pgoff_t prev_offset;
int sequential;
--
next prev parent reply other threads:[~2009-04-10 6:20 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-10 6:09 [PATCH 0/9] filemap and readahead fixes for linux-next Wu Fengguang
2009-04-10 6:09 ` [PATCH 1/9] readahead: move max_sane_readahead() calls into force_page_cache_readahead() Wu Fengguang
2009-04-10 6:09 ` Wu Fengguang [this message]
2009-04-10 6:10 ` [PATCH 3/9] readahead: remove one unnecessary radix tree lookup Wu Fengguang
2009-04-10 6:10 ` [PATCH 4/9] readahead: increase interleaved readahead size Wu Fengguang
2009-04-10 6:10 ` [PATCH 5/9] readahead: remove sync/async readahead call dependency Wu Fengguang
2009-04-10 6:10 ` [PATCH 6/9] readahead: clean up and simplify the code for filemap page fault readahead Wu Fengguang
2009-04-10 23:48 ` Andrew Morton
2009-04-11 13:58 ` KOSAKI Motohiro
2009-04-11 18:49 ` Andrew Morton
2009-04-12 23:16 ` KOSAKI Motohiro
2009-04-10 6:10 ` [PATCH 7/9] readahead: sequential mmap readahead Wu Fengguang
2009-04-10 23:34 ` Andrew Morton
2009-04-12 6:50 ` Wu Fengguang
2009-04-12 7:09 ` [PATCH] readahead: enforce full sync mmap readahead size Wu Fengguang
2009-04-12 15:15 ` Linus Torvalds
2009-04-13 13:53 ` Wu Fengguang
2009-04-14 7:01 ` Nick Piggin
2009-04-10 6:10 ` [PATCH 8/9] readahead: enforce full readahead size on async mmap readahead Wu Fengguang
2009-04-10 6:10 ` [PATCH 9/9] readahead: record mmap read-around states in file_ra_state Wu Fengguang
2009-04-10 23:38 ` Andrew Morton
2009-04-11 4:24 ` Wu Fengguang
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