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SubjectRe: [PATCH 2/9]: Reduce Log I/O latency
> FWIW from a "real time" database POV this seems to make sense to me...
> in fact, we probably rely on filesystem metadata way too much
> (historically it's just "worked".... although we do seem to get issues
> on ext3).

For that case you really would need priority inheritance: any metadata
IO on behalf or blocking a process needs to use the process' block IO

David's change just fixes a limited set of cases, but breaks others.

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