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readahead: apply max_sane_readahead() limit in ondemand_readahead() 

Just in case someone aggressively sets a huge readahead size.

Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Wu Fengguang 2009-06-16 15:31:21 -07:00 committed by Linus Torvalds
parent f7e839dd36
commit fc31d16add
1 changed files with 1 additions and 1 deletions
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2
mm/readahead.c
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@ -357,7 +357,7 @@ ondemand_readahead(struct address_space *mapping,
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;