On 02/23/2010 10:10 PM, Wu Fengguang wrote:
Some applications (eg. blkid, id3tool etc.) seek around the file to get information. For example, blkid does seek to 0 read 1024 seek to 1536 read 16384 The start-of-file readahead heuristic is wrong for them, whose access pattern can be identified by lseek() calls. So test-and-set a READAHEAD_LSEEK flag on lseek() and don't do start-of-file readahead on seeing it. Proposed by Linus. Acked-by: Linus Torvalds<torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Wu Fengguang<fengguang.wu@xxxxxxxxx>
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