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[Qemu-devel] [PATCH] memory usage and ioports

From: Samuel Thibault
Subject: [Qemu-devel] [PATCH] memory usage and ioports
Date: Wed, 6 Feb 2008 14:24:26 +0000
User-agent: Mutt/1.5.12-2006-07-14

Samuel Thibault, le Mon 19 Nov 2007 15:20:16 +0000, a écrit :
> Qemu currently uses 6 65k tables of pointers for handling ioports, which
> makes 3MB on 64bit machines. There's a comment that says "XXX: use a two
> level table to limit memory usage". But wouldn't it be more simple and
> effective to just allocate them through mmap() and when a NULL pointer
> is read, call the default handlers?

Here is a patch that does this and indeed saves 3MB on 64bit machines.


Attachment: patch-qemu-ioport
Description: Text document

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