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    SubjectRe: [PATCH 10/11] readahead: dont do start-of-file readahead after lseek()
    On Tue, Feb 02, 2010 at 11:28:45PM +0800, 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.

    Wouldn't that trigger on lseeks to end of file to get the size?

    OG.



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