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    SubjectRe: [PATCH 11/15] readahead: dont do start-of-file readahead after lseek()
    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@linux-foundation.org>
    > Signed-off-by: Wu Fengguang<fengguang.wu@intel.com>

    Acked-by: Rik van Riel <riel@redhat.com>


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