On Tue, 2 Feb 2010, 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. > > CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx> Acked-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Linus -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
