From: stian@nixia.no
To: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Cc: Henrik Nordstrom <uml@hno.marasystems.com>,
Rob Landley <rob@landley.net>,
user-mode-linux-devel@lists.sourceforge.net,
Jeff Dike <jdike@addtoit.com>,
"Vaibhav Sharma, Noida" <vaibhavs@noida.hcltech.com>,
Doug Dumitru <doug@easyco.com>
Subject: Re: [uml-devel] memory
Date: Mon, 24 Jan 2005 12:32:46 +0100 (CET) [thread overview]
Message-ID: <51673.80.203.0.208.1106566366.squirrel@80.203.0.208> (raw)
In-Reply-To: <41F4DC94.7030900@fujitsu-siemens.com>
> Linux needs to have one struct page for each physical mem page, which in
> the
> simple case of UML are placed in one memmap array.
> This array needs to be accessible permanently to the kernel, i.e. it
> has to be in low-mem. AFAIK, one struct page is 44 bytes in size, thus the
> array is about 1% of the entire physical mem in size.
You can mangle with the page-size as-well. You will break some few
programs by increasing the page-size too 16K instead of 4K, but most
software should respect the output mmap gives it, etc.
Stian
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next prev parent reply other threads:[~2005-01-24 11:32 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-23 6:46 [uml-devel] memory Vaibhav Sharma, Noida
2005-01-23 8:28 ` Doug Dumitru
2005-01-23 9:51 ` Rob Landley
2005-01-24 18:41 ` Blaisorblade
2005-01-23 18:27 ` Henrik Nordstrom
2005-01-23 18:25 ` Rob Landley
2005-01-24 10:02 ` Henrik Nordstrom
2005-01-24 18:52 ` Blaisorblade
2005-01-24 1:11 ` Jeff Dike
2005-01-24 5:10 ` Rob Landley
2005-01-24 10:12 ` Henrik Nordstrom
2005-01-24 11:31 ` Bodo Stroesser
2005-01-24 11:32 ` stian [this message]
[not found] ` <200501241811.j0OIBYXk002874@ccure.user-mode-linux.org>
2005-01-24 16:24 ` Bodo Stroesser
-- strict thread matches above, loose matches on Subject: below --
2005-01-24 8:13 Vaibhav Sharma, Noida
2005-01-24 12:43 ` Rob Landley
2005-01-24 19:07 ` Blaisorblade
2005-01-24 22:41 ` Henrik Nordstrom
2005-01-25 1:40 ` Rob Landley
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