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    SubjectRe: Buffer and Page cache coherent? was: Strange IDE performance change in 2.6.1-rc1 (again)
    Mike Fedyk <mfedyk@matchmail.com> wrote:
    >
    > So in what way is the buffer cache coherent with the pagecache?
    >

    There is no "buffer cache" in Linux. There is a pagecache for /etc/passwd
    and there is a pagecache for /dev/hda1. They are treated pretty much
    identically. The kernel attaches buffer_heads to those pagecache pages
    when needed - generally when it wants to deal with individual disk blocks.

    > Any progress on that pagecache coherent block relocation patch you had for
    > ext3? :)

    No.
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