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    SubjectRe: [PATCH 00/23] per device dirty throttling -v8
    > i use Mutt myself, on such a filesystem:
    >
    > /dev/md0 on / type ext3 (rw,noatime,nodiratime,user_xattr)
    >
    > and i can see no problems, it notices new mails just fine.

    In some setups it will and in others it won't. Nor is it the only
    application that has this requirement. Ext3 currently is a standards
    compliant file system. Turn off atime and its very non standards
    compliant, turn to relatime and its not standards compliant but nobody
    will break (which is good)

    Either change is a big user/kernel interface change and no major vendor
    targets desktop as primary market so I'm not suprised they haven't done
    this. The fix is to educate them further not to break the kernel.

    There are several reasons for that
    - Distros will change the least conservative stuff first so we
    have the dedicated followers of fashion finding problems first
    - Existing systems won't suddenly change behaviour and break
    (and as the catastrophic failure case is backup failure we do
    not want to break them)

    People just need to know about the performance differences - very few
    realise its more than a fraction of a percent. I'm sure Gentoo will use
    relatime the moment anyone knows its > 5% 8)

    Alan
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