Re: [PATCH 04/10] mm: slub: add knowledge of reserve pages

Andrew Morton
2007-08-08T18:46:36Z

On Wed, 8 Aug 2007 10:57:13 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> I think in general irq context reclaim is doable. Cannot see obvious
> issues on a first superficial pass through rmap.c. The irq holdoff would
> be pretty long though which may make it unacceptable.

The IRQ holdoff could be tremendous. But if it is sufficiently infrequent
and if the worst effect is merely a network rx ring overflow then the tradeoff
might be a good one.