Re: [PATCH v2] vmscan: limit concurrent reclaimers in shrink_zone

[Avi Kivity]

On 12/18/2009 04:12 PM, Rik van Riel wrote:
> On 12/18/2009 08:38 AM, Avi Kivity wrote:
>
> > > + /* Number of processes running page reclaim code on this zone. */
> > > + atomic_t concurrent_reclaimers;
> > > + wait_queue_head_t reclaim_wait;
> > > +
> >
> > Counting semaphore?
>
> I don't see a safe way to adjust a counting semaphore
> through /proc/sys.

True.  Maybe it's worthwhile to add such a way if this pattern has more 
uses.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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