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[Qemu-devel] Re: memory usage and ioports
From: |
Samuel Thibault |
Subject: |
[Qemu-devel] Re: memory usage and ioports |
Date: |
Mon, 19 Nov 2007 15:34:21 +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?
For the ioport_opaque array (500KB on 64bit), it's much simpler, as the
attached patch suggests.
Samuel
patch
Description: Text document