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SubjectRe: ext3_ordered_writepage() questions
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On Fri, 2006-03-17 at 14:38 -0800, Badari Pulavarty wrote:
> On Fri, 2006-03-17 at 17:22 -0500, Stephen C. Tweedie wrote:

> > There is one other perspective to be aware of, though: the current
> > behaviour means that by default ext3 generally starts flushing pending
> > writeback data within 5 seconds of a write. Without that, we may end up
> > accumulating a lot more dirty data in memory, shifting the task of write
> > throttling from the filesystem to the VM.
>
> Hmm.. You got a point there.
>
> >
> > That's not a problem per se, just a change of behaviour to keep in mind,
> > as it could expose different corner cases in the performance of
> > write-intensive workloads.
> >
> > --Stephen
> >
> >
>

Current data=writeback mode already behaves like this, so the VM
subsystem should be tested for a certain extent, isn't?

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