From: Linus Torvalds <torvalds@linux-foundation.org>
To: Jeff Chua <jeff.chua.linux@gmail.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hugh@veritas.com>
Subject: Re: 2.6.32-rc3: low mem - only 378MB on x86_32 with 64GB. Why?
Date: Mon, 5 Oct 2009 11:12:06 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.2.01.0910051110200.3432@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.64.0910052334480.17655@boston.corp.fedex.com>
On Mon, 5 Oct 2009, Jeff Chua wrote:
>
> I've 3 systems with 4GB, 16GB and 64GB all running 32bit with these set:
Don't.
4GB is useable. 8GB is borderline. 16GB+ and nobody will care.
> # with 64GB
> total used free shared buffers cached
> Mem: 63995 524 63470 0 4 365
> Low: 378 32 345
All your low memory is used for the 'struct page' arrays that describe
everything else.
> Anything I should do?
Use a 64-bit CPU and kernel or limit your memory to 8GB or so. No ifs,
buts and maybe's.
Linus
next prev parent reply other threads:[~2009-10-05 18:12 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-05 15:57 2.6.32-rc3: low mem - only 378MB on x86_32 with 64GB. Why? Jeff Chua
2009-10-05 18:12 ` Linus Torvalds [this message]
[not found] ` <b6a2187b0910051715y4ee63503y148ba2d7e24cad8e@mail.gmail.com>
2009-10-06 0:30 ` Linus Torvalds
2009-10-06 10:06 ` Tvrtko Ursulin
2009-10-06 11:01 ` Frans Pop
2009-10-14 21:32 ` Lennart Sorensen
2009-10-06 12:59 ` David Woodhouse
2009-10-06 14:26 ` Linus Torvalds
2009-10-11 9:08 ` Benjamin Herrenschmidt
[not found] ` <b6a2187b0910052312o662642b2teded3d19548b9151@mail.gmail.com>
2009-10-06 14:35 ` Linus Torvalds
[not found] ` <b6a2187b0910080926x303d3c9em8f70632fb19b6509@mail.gmail.com>
2009-10-08 16:35 ` Dave Hansen
[not found] ` <b6a2187b0910090928r648169dax86178a3e8b8c2f21@mail.gmail.com>
2009-10-10 18:10 ` Valdis.Kletnieks
2009-10-10 18:37 ` Linus Torvalds
2009-10-11 9:06 ` Benjamin Herrenschmidt
2009-10-11 17:34 ` Linus Torvalds
2009-10-06 16:50 ` Yuhong Bao
2009-10-05 18:42 ` Byron Stanoszek
2009-10-05 19:15 ` Dave Hansen
-- strict thread matches above, loose matches on Subject: below --
2009-10-05 19:42 Tomasz Chmielewski
2009-10-05 20:31 ` Valdis.Kletnieks
[not found] <drYiu-Pj-15@gated-at.bofh.it>
2009-10-05 20:05 ` Daniel J Blueman
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