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    SubjectRe: [PATCH 00/23] per device dirty throttling -v8

    * Diego Calleja <diegocg@gmail.com> wrote:

    > El Sat, 4 Aug 2007 18:37:33 +0200, Ingo Molnar <mingo@elte.hu> escribió:
    >
    > > thousands of applications. So for most file workloads we give
    > > Windows a 20%-30% performance edge, for almost nothing. (for
    > > RAM-starved kernel builds the performance difference between atime
    > > and noatime+nodiratime setups is more on the order of 40%)
    >
    > Just curious - do you have numbers with relatime?

    nope. Stupid question, i just tried it and got this:

    EXT3-fs: Unrecognized mount option "relatime" or missing value

    i've got util-linux-2.13-0.46.fc6 and 2.6.22 on that box, shouldnt that
    be recent enough? As far as i can see it from the kernel-side code, this
    works on the general VFS level and hence should be supported by ext3
    already.

    even relatime means one extra write IO after a file has been created,
    but at least for read-mostly files it avoids the continuous atime
    update.

    Ingo
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