Re: [PATCH] cpuset confine pdflush to its cpuset

[Andrew Morton]

Paul Jackson <pj@xxxxxxx> wrote:
>
> Takahashi-san wrote:
> > I realized CPUSETS has another problem around pdflush.
> 
> Excellent observation.  I had not realized this.
> 
> Thank-you for pointing it out.
> 
> I don't have plans.  Do you have any suggestions?

Per-zone dirty thresholds (quite messy), per-zone writeback (horrific,
linear searches or data structure proliferation everywhere).

Let's see a (serious) worload/testcase first, hey?  vmscan.c writeback off
the LRU is a bit slow, but we should be able to make it suffice.

>   ( Anyone know what the "pd" stands for in pdflush ?? )

"page dirty"?  It's what bdflush became when writeback went from
being block-based to being page-based.
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