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

    * Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:

    > > Linux has always been a "POSIX unless its stupid" type of system.
    > > For the upstream kernel, we should do the right thing -- noatime by
    > > default -- but allow distros and people that care about rigid
    > > compliance to easily change the default.
    >
    > Linux has never been a "suprise your kernel interfaces all just
    > changed today" kernel, nor a "gosh you upgraded and didn't notice your
    > backups broke" kernel.

    HSM uses atime as a _hint_. The only even remotely valid argument is
    Mutt, and even that one could easily be fixed _it is not even installed
    by default on most distros_ and nobody but me uses it ;) [and i've been
    using Mutt on noatime filesystems for years] So basically a single type
    of package and use-case (against tens of thousands of packages) held all
    of Linux desktop IO performance hostage for 10 years, to the tune of a
    20-30-50-100% performance degradation (depending on the workload)? Wow.

    And the atime situation is _so_ obvious, what will we do in the much
    less obvious cases?

    Ingo
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