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

[...]

>
> It's pretty much unfixable given the ext3 journalling design, and the
> guarantees which data-ordered provides.

ZFS has intent log to handle this
(http://blogs.sun.com/realneel/entry/the_zfs_intent_log). Something like
that can --theoretically-- be added to ext3-style journalling.

Nikita.

>
> The easy preventive is to mount with data=writeback. Maybe that should
> have been the default.

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