Messages in this thread | | | Date | Tue, 2 Feb 2010 09:39:38 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [PATCH 10/11] readahead: dont do start-of-file readahead after lseek() |
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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@linux-foundation.org> > Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus
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