kqemu, FreeBSD, and virtual filesystem
nox at jelal.kn-bremen.de
Wed Sep 21 11:53:50 PDT 2005
On Wed, Sep 21, 2005 at 06:25:52PM +0200, Lyubich, M wrote:
> My question relates to accelerator KQEMU and how it should be configured
> for FreeBSD.
> The documentation on the Fabrice's site
> states that:
> "When using KQEMU on a Linux or FreeBSD host, QEMU will create a big
> hidden file containing the RAM of the virtual machine. For best
> performance, it is important that this file is kept in RAM and not on
> the hard disk. ..... You can use the QEMU_TMPDIR shell variable to set a
> new directory for the QEMU RAM file."
> Applying this to freebsd, does it mean that I have to use mdconfig +
> newfs to create new filesystem and then setenv QEMU_TMPDIR=/dev/md0?
The FreeBSD port uses the MAP_ANON mmap flag, and doesnt need QEMU_TMPDIR
(see files/patch-osdep.c which patches work/qemu-snapshot-2005-09-09_23/
osdep.c:qemu_vmalloc().) So you don't need to do anything.
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