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Message-ID: <4535160E.2010908@yahoo.com.au> Date: Wed, 18 Oct 2006 03:42:38 +1000 From: Nick Piggin <nickpiggin@...oo.com.au> To: Martin Bligh <mbligh@...gle.com> CC: Andrew Morton <akpm@...l.org>, LKML <linux-kernel@...r.kernel.org>, Linux Memory Management <linux-mm@...ck.org>, Nick Piggin <npiggin@...e.de> Subject: Re: [RFC] Remove temp_priority Martin Bligh wrote: > This is not tested yet. What do you think? > > This patch removes temp_priority, as it is racy. We're setting > prev_priority from it, and yet temp_priority could have been > set back to DEF_PRIORITY by another reclaimer. I like it. I wonder if we should get kswapd to stick its priority into the zone at the point where zone_watermark_ok becomes true, rather than setting all zones to the lowest priority? That would require a bit more logic though I guess. For that matter (going off the topic a bit), I wonder if try_to_free_pages should have a watermark check there too? This might help reduce the latency issue you brought up where one process has reclaimed a lot of pages, but another isn't making any progress and has to go through the full priority range? Maybe that's statistically pretty unlikely? -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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