From: Johannes Weiner <hannes@cmpxchg.org>
To: Mel Gorman <mgorman@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Dave Hansen <dave.hansen@intel.com>,
Rik van Riel <riel@redhat.com>, Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 6/7] mm: page_alloc: Only account batch allocations requests that are eligible
Date: Mon, 16 Dec 2013 15:52:37 -0500 [thread overview]
Message-ID: <20131216205237.GB21724@cmpxchg.org> (raw)
In-Reply-To: <1386943807-29601-7-git-send-email-mgorman@suse.de>
On Fri, Dec 13, 2013 at 02:10:06PM +0000, Mel Gorman wrote:
> Not signed off. Johannes, was the intent really to decrement the batch
> counts regardless of whether the policy was being enforced or not?
Yes. Bursts of allocations for which the policy does not get enforced
will still create memory pressure and affect cache aging on a given
node. So even if we only distribute page cache, we want to distribute
it in a way that all allocations on the eligible zones equal out.
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: Mel Gorman <mgorman@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Dave Hansen <dave.hansen@intel.com>,
Rik van Riel <riel@redhat.com>, Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 6/7] mm: page_alloc: Only account batch allocations requests that are eligible
Date: Mon, 16 Dec 2013 15:52:37 -0500 [thread overview]
Message-ID: <20131216205237.GB21724@cmpxchg.org> (raw)
In-Reply-To: <1386943807-29601-7-git-send-email-mgorman@suse.de>
On Fri, Dec 13, 2013 at 02:10:06PM +0000, Mel Gorman wrote:
> Not signed off. Johannes, was the intent really to decrement the batch
> counts regardless of whether the policy was being enforced or not?
Yes. Bursts of allocations for which the policy does not get enforced
will still create memory pressure and affect cache aging on a given
node. So even if we only distribute page cache, we want to distribute
it in a way that all allocations on the eligible zones equal out.
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next prev parent reply other threads:[~2013-12-16 20:52 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-13 14:10 [RFC PATCH 0/7] Configurable fair allocation zone policy v2r6 Mel Gorman
2013-12-13 14:10 ` Mel Gorman
2013-12-13 14:10 ` [PATCH 1/7] mm: page_alloc: exclude unreclaimable allocations from zone fairness policy Mel Gorman
2013-12-13 14:10 ` Mel Gorman
2013-12-13 15:45 ` Rik van Riel
2013-12-13 15:45 ` Rik van Riel
2013-12-13 14:10 ` [PATCH 2/7] mm: page_alloc: Break out zone page aging distribution into its own helper Mel Gorman
2013-12-13 14:10 ` Mel Gorman
2013-12-13 15:46 ` Rik van Riel
2013-12-13 15:46 ` Rik van Riel
2013-12-16 20:16 ` Johannes Weiner
2013-12-16 20:16 ` Johannes Weiner
2013-12-13 14:10 ` [PATCH 3/7] mm: page_alloc: Use zone node IDs to approximate locality Mel Gorman
2013-12-13 14:10 ` Mel Gorman
2013-12-16 13:20 ` Rik van Riel
2013-12-16 13:20 ` Rik van Riel
2013-12-16 20:25 ` Johannes Weiner
2013-12-16 20:25 ` Johannes Weiner
2013-12-17 11:13 ` Mel Gorman
2013-12-17 11:13 ` Mel Gorman
2013-12-17 15:38 ` Johannes Weiner
2013-12-17 15:38 ` Johannes Weiner
2013-12-17 16:08 ` Mel Gorman
2013-12-17 16:08 ` Mel Gorman
2013-12-17 20:11 ` Johannes Weiner
2013-12-17 20:11 ` Johannes Weiner
2013-12-17 21:03 ` Mel Gorman
2013-12-17 21:03 ` Mel Gorman
2013-12-17 22:31 ` Johannes Weiner
2013-12-17 22:31 ` Johannes Weiner
2013-12-13 14:10 ` [PATCH 4/7] mm: Annotate page cache allocations Mel Gorman
2013-12-13 14:10 ` Mel Gorman
2013-12-16 15:20 ` Rik van Riel
2013-12-16 15:20 ` Rik van Riel
2013-12-13 14:10 ` [PATCH 5/7] mm: page_alloc: Make zone distribution page aging policy configurable Mel Gorman
2013-12-13 14:10 ` Mel Gorman
2013-12-16 19:25 ` Rik van Riel
2013-12-16 19:25 ` Rik van Riel
2013-12-16 20:42 ` Johannes Weiner
2013-12-16 20:42 ` Johannes Weiner
2013-12-17 15:29 ` Mel Gorman
2013-12-17 15:29 ` Mel Gorman
2013-12-17 15:54 ` Johannes Weiner
2013-12-17 15:54 ` Johannes Weiner
2013-12-17 16:14 ` Mel Gorman
2013-12-17 16:14 ` Mel Gorman
2013-12-17 17:43 ` Johannes Weiner
2013-12-17 17:43 ` Johannes Weiner
2013-12-17 21:22 ` Mel Gorman
2013-12-17 21:22 ` Mel Gorman
2013-12-17 22:57 ` Johannes Weiner
2013-12-17 22:57 ` Johannes Weiner
2013-12-17 23:24 ` Mel Gorman
2013-12-17 23:24 ` Mel Gorman
2013-12-13 14:10 ` [PATCH 6/7] mm: page_alloc: Only account batch allocations requests that are eligible Mel Gorman
2013-12-13 14:10 ` Mel Gorman
2013-12-16 20:52 ` Johannes Weiner [this message]
2013-12-16 20:52 ` Johannes Weiner
2013-12-17 11:20 ` Mel Gorman
2013-12-17 11:20 ` Mel Gorman
2013-12-17 15:43 ` Johannes Weiner
2013-12-17 15:43 ` Johannes Weiner
2013-12-17 16:06 ` Mel Gorman
2013-12-17 16:06 ` Mel Gorman
2013-12-13 14:10 ` [PATCH 7/7] mm: page_alloc: Default allow file pages to use remote nodes for fair allocation policy Mel Gorman
2013-12-13 14:10 ` Mel Gorman
2013-12-13 17:04 ` Johannes Weiner
2013-12-13 17:04 ` Johannes Weiner
2013-12-13 19:20 ` Mel Gorman
2013-12-13 19:20 ` Mel Gorman
2013-12-13 22:15 ` Johannes Weiner
2013-12-13 22:15 ` Johannes Weiner
2013-12-17 16:04 ` Mel Gorman
2013-12-17 16:04 ` Mel Gorman
2013-12-16 19:26 ` Rik van Riel
2013-12-16 19:26 ` Rik van Riel
2013-12-17 15:07 ` [RFC PATCH 0/7] Configurable fair allocation zone policy v2r6 Zlatko Calusic
2013-12-17 15:07 ` Zlatko Calusic
2013-12-17 21:23 ` Mel Gorman
2013-12-17 21:23 ` Mel Gorman
2013-12-21 16:03 ` Zlatko Calusic
2013-12-21 16:03 ` Zlatko Calusic
2013-12-23 10:26 ` Mel Gorman
2013-12-23 10:26 ` Mel Gorman
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