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    SubjectRe: [PATCH] drop page cache of a single file
    On Thu, Dec 28, 2006 at 02:29:26AM -0800, Andrew Morton wrote:
    > On Thu, 28 Dec 2006 15:19:04 +0800
    > Fengguang Wu <fengguang.wu@gmail.com> wrote:
    >
    > > Yanmin: I've been using the fadvise tool from
    > > http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz
    > >
    > > It's a nice tool:
    > >
    > > % fadvise
    > > Usage: fadvise filename offset length advice [loops]
    > > advice: normal sequential willneed noreuse dontneed asyncwrite writewait
    > > % fadvise /var/sparse 0 0x7fffffff dontneed
    > >
    >
    > I was a bit reluctant to point at that because it has nasty hacks to make
    > it mostly-work on old glibc's which don't implement posix_fadvise().
    >
    > Hopefully if you're running a recent distro, you have glibc support for
    > fadvise() and it's possible to write a portable version of that app which
    > doesn't need to know about per-arch syscall numbers.

    Bad news: it's still broken. posix_fadvise() here just failed silently.
    I'm running Debian Etch with libc6=2.3.6.ds1-7.
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