From: Nick Piggin <piggin@cyberone.com.au>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andrea Arcangeli <andrea@suse.de>,
Peter Zaitsev <peter@mysql.com>, Andrew Morton <akpm@osdl.org>,
riel@redhat.com, mbligh@aracnet.com,
linux-kernel@vger.kernel.org
Subject: Re: 2.4.23aa2 (bugfixes and important VM improvements for the high end)
Date: Sun, 07 Mar 2004 21:29:37 +1100 [thread overview]
Message-ID: <404AF991.9040709@cyberone.com.au> (raw)
In-Reply-To: <20040307084120.GB17629@elte.hu>
Ingo Molnar wrote:
>* Andrea Arcangeli <andrea@suse.de> wrote:
>
>
>>[...] but I'm quite confortable to say that up to 16G (included) 4:4
>>is worthless unless you've to deal with the rmap waste IMHO. [...]
>>
>
>i've seen workloads on 8G RAM systems that easily filled up the ~800 MB
>lowmem zone. (it had to do with many files and having them as a big
>dentry cache, so yes, it's unfixable unless you start putting inodes
>into highmem which is crazy. And yes, performance broke down unless most
>of the dentries/inodes were cached in lowmem.)
>
>
If you still have any of these workloads around, they would be
good to test on the memory management changes in Andrew's mm tree
which should correctly balance slab on highmem systems. Linus'
tree has a few problems here.
But if you really have a lot more than 800MB of active dentries,
then maybe 4:4 would be a win?
next prev parent reply other threads:[~2004-03-07 10:29 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-27 1:33 2.4.23aa2 (bugfixes and important VM improvements for the high end) Andrea Arcangeli
2004-02-27 4:38 ` Rik van Riel
2004-02-27 17:32 ` Andrea Arcangeli
2004-02-27 19:08 ` Rik van Riel
2004-02-27 20:29 ` Andrew Morton
2004-02-27 20:49 ` Rik van Riel
2004-02-27 20:55 ` Andrew Morton
2004-02-27 21:28 ` Andrea Arcangeli
2004-02-27 21:37 ` Andrea Arcangeli
2004-02-28 3:22 ` Andrea Arcangeli
2004-03-01 11:10 ` Nikita Danilov
2004-02-27 21:15 ` Andrea Arcangeli
2004-02-27 22:03 ` Martin J. Bligh
2004-02-27 22:23 ` Andrew Morton
2004-02-28 2:32 ` Andrea Arcangeli
2004-02-28 4:57 ` Wim Coekaerts
2004-02-28 6:18 ` Andrea Arcangeli
2004-02-28 6:45 ` Martin J. Bligh
2004-02-28 7:05 ` Andrea Arcangeli
2004-02-28 9:19 ` Dave Hansen
2004-03-18 2:44 ` Andrea Arcangeli
[not found] ` <20040228061838.GO8834@dualathlon.random.suse.lists.linux.kernel>
2004-02-28 12:46 ` Andi Kleen
2004-02-29 1:39 ` Andrea Arcangeli
2004-02-29 2:29 ` Andi Kleen
2004-02-29 16:34 ` Andrea Arcangeli
2004-02-28 6:10 ` Martin J. Bligh
2004-02-28 6:43 ` Andrea Arcangeli
2004-02-28 7:00 ` Martin J. Bligh
2004-02-28 7:29 ` Andrea Arcangeli
2004-02-28 14:55 ` Rik van Riel
2004-02-28 15:06 ` Arjan van de Ven
2004-02-29 1:43 ` Andrea Arcangeli
[not found] ` < 1078370073.3403.759.camel@abyss.local>
2004-03-04 3:14 ` Peter Zaitsev
2004-03-04 3:33 ` Andrew Morton
2004-03-04 3:44 ` Peter Zaitsev
2004-03-04 4:07 ` Andrew Morton
2004-03-04 4:44 ` Peter Zaitsev
2004-03-04 4:52 ` Andrea Arcangeli
2004-03-04 5:10 ` Andrew Morton
2004-03-04 5:27 ` Andrea Arcangeli
2004-03-04 5:38 ` Andrew Morton
2004-03-05 20:19 ` Jamie Lokier
2004-03-05 20:33 ` Andrea Arcangeli
2004-03-05 21:44 ` Jamie Lokier
2004-03-04 12:12 ` Rik van Riel
2004-03-04 16:21 ` Peter Zaitsev
2004-03-04 18:13 ` Andrea Arcangeli
2004-03-04 17:35 ` Martin J. Bligh
2004-03-04 18:16 ` Andrea Arcangeli
2004-03-04 19:31 ` Martin J. Bligh
2004-03-04 20:21 ` Peter Zaitsev
2004-03-05 10:33 ` Ingo Molnar
2004-03-05 14:15 ` Andrea Arcangeli
2004-03-05 14:32 ` Ingo Molnar
2004-03-05 14:58 ` Andrea Arcangeli
2004-03-05 15:26 ` Ingo Molnar
2004-03-05 15:53 ` Andrea Arcangeli
2004-03-07 8:41 ` Ingo Molnar
2004-03-07 10:29 ` Nick Piggin [this message]
2004-03-07 17:33 ` Andrea Arcangeli
2004-03-08 5:15 ` Nick Piggin
2004-03-07 17:24 ` Andrea Arcangeli
2004-03-05 21:28 ` Martin J. Bligh
2004-03-05 18:42 ` Martin J. Bligh
2004-03-05 19:13 ` Andrea Arcangeli
2004-03-05 19:55 ` Martin J. Bligh
2004-03-05 20:29 ` Andrea Arcangeli
2004-03-05 20:41 ` Andrew Morton
2004-03-05 21:07 ` Andrea Arcangeli
2004-03-05 22:12 ` Andrew Morton
2004-03-05 14:34 ` Ingo Molnar
2004-03-05 14:59 ` Andrea Arcangeli
2004-03-05 15:02 ` Ingo Molnar
[not found] ` <20040305150225.GA13237@elte.hu.suse.lists.linux.kernel>
2004-03-05 15:51 ` Andi Kleen
2004-03-05 16:23 ` Ingo Molnar
2004-03-05 16:39 ` Andrea Arcangeli
2004-03-07 8:16 ` Ingo Molnar
2004-03-10 13:21 ` Andi Kleen
2004-03-05 16:42 ` Andrea Arcangeli
2004-03-05 16:49 ` Ingo Molnar
2004-03-05 16:58 ` Andrea Arcangeli
2004-03-05 20:11 ` Jamie Lokier
2004-03-06 5:12 ` Jamie Lokier
2004-03-06 12:56 ` Magnus Naeslund(t)
2004-03-06 13:13 ` Magnus Naeslund(t)
2004-03-07 11:55 ` Ingo Molnar
2004-03-07 6:50 ` Peter Zaitsev
2004-03-02 9:10 ` Kurt Garloff
2004-03-02 15:32 ` Martin J. Bligh
2004-02-27 21:42 ` Hugh Dickins
2004-02-27 23:18 ` Marcelo Tosatti
2004-02-27 22:39 ` Andrew Morton
2004-02-27 20:31 ` Andrea Arcangeli
2004-02-29 6:34 ` Mike Fedyk
[not found] <20040304175821.GO4922@dualathlon.random>
2004-03-04 22:14 ` Rik van Riel
2004-03-04 23:24 ` Andrea Arcangeli
2004-03-05 3:43 ` Rik van Riel
[not found] <1u7eQ-6Bz-1@gated-at.bofh.it>
[not found] ` <1ue6M-45w-11@gated-at.bofh.it>
[not found] ` <1uofN-4Rh-25@gated-at.bofh.it>
[not found] ` <1vRz3-5p2-11@gated-at.bofh.it>
[not found] ` <1vRSn-5Fc-11@gated-at.bofh.it>
[not found] ` <1vS26-5On-21@gated-at.bofh.it>
[not found] ` <1wkUr-3QW-11@gated-at.bofh.it>
[not found] ` <1wolx-7ET-31@gated-at.bofh.it>
[not found] ` <1woEM-7Yx-41@gated-at.bofh.it>
[not found] ` <1wp8b-7x-3@gated-at.bofh.it>
[not found] ` <1wp8l-7x-25@gated-at.bofh.it>
[not found] ` <1x0qG-Dr-3@gated-at.bofh.it>
2004-03-12 21:15 ` Andi Kleen
2004-03-18 19:50 ` Peter Zaitsev
[not found] ` <1woEJ-7Yx-25@gated-at.bofh.it>
[not found] ` <1wp8c-7x-5@gated-at.bofh.it>
[not found] ` <1wprd-qI-21@gated-at.bofh.it>
[not found] ` <1wpUz-Tw-21@gated-at.bofh.it>
[not found] ` <1x293-2nT-7@gated-at.bofh.it>
2004-03-12 21:25 ` Andi Kleen
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