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[Qemu-devel] [Bug 1252010] Re: can't assign enough RAM to the VM


From: Stefan Weil
Subject: [Qemu-devel] [Bug 1252010] Re: can't assign enough RAM to the VM
Date: Mon, 18 Nov 2013 06:01:22 -0000

QEMU currently needs contiguous memory for the guest memory. Hosts
running 32 bit Windows only provide about 2 GiB for programs. This 2 GiB
is used for the executable, all loaded dlls and dynamic memory.
Especially the dlls cause memory fragmentation, so newer versions of
QEMU which need more dlls get less contiguous memory.

Running 32 bit QEMU on 64 bit Windows helps, and 64 bit QEMU also has no
problem with allocating a large guest RAM.

-- 
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https://bugs.launchpad.net/bugs/1252010

Title:
  can't assign enough RAM to the VM

Status in QEMU:
  Confirmed

Bug description:
  QEMU version: 1.6.90.0 from 2013 11 16
  Host OS: Windows XP SP3 x86
  Host machine: 3.2 GHz AMD Athlon 64 dual core processor, 4 GB DDR II (3.2 
seen by the OS) memory
  Guest OS: Grub4Dos boot manager menu
  Problem: you can't assign more than 880 MB memory to the VM, although with 
0.15.1.0 version you can assign up to 1179 MB.

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