From: Nikita Danilov <Nikita@Namesys.COM>
To: Andrew Morton <akpm@osdl.org>
Cc: Linux-Kernel@vger.kernel.org
Subject: Re: [PATCH] 1/5 VM changes: zone-pressure.patch
Date: Wed, 9 Jul 2003 14:30:53 +0400 [thread overview]
Message-ID: <16139.61149.764358.333360@laputa.namesys.com> (raw)
In-Reply-To: <20030709032227.23ee4159.akpm@osdl.org>
Andrew Morton writes:
> Nikita Danilov <Nikita@Namesys.COM> wrote:
> >
> > + if (priority < 0) {
> > + for (i = 0; i < pgdat->nr_zones; i++) {
> > + struct zone *zone = pgdat->node_zones + i;
> > +
> > + if (zone->free_pages < zone->pages_high)
> > + zone_adj_pressure(zone, -1);
> > + }
> > + }
>
> What is this bit doing?
kswapd failed to balance some zone after going up to the maximal
priority (0), increase ->pressure on this zone.
In other words: zone->pressure is average of the scanning priority
required to free enough pages in this zone. As no scanning priority was
enough to free pages, zone->pressure should be extra high.
Nikita.
prev parent reply other threads:[~2003-07-09 10:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-09 8:46 [PATCH] 1/5 VM changes: zone-pressure.patch Nikita Danilov
2003-07-09 10:12 ` Andrew Morton
2003-07-09 10:20 ` Nikita Danilov
2003-07-09 10:42 ` Andrew Morton
2003-07-09 11:19 ` Nikita Danilov
2003-07-10 14:40 ` Martin Schlemmer
2003-07-17 13:50 ` Nikita Danilov
2003-07-09 10:22 ` Andrew Morton
2003-07-09 10:30 ` Nikita Danilov [this message]
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