[Qemu-devel] kqemu freebsd host smp problems?
Norikatsu Shigemura
nork at FreeBSD.org
Sun Jul 10 12:27:37 GMT 2005
On Sun, 10 Jul 2005 12:10:28 +0100
Antony T Curtis <antony.t.curtis at ntlworld.com> wrote:
> > I confirmed that qemu on latest FreeBSD 6-current got more
> > stability!!, but more little slowly:-( and a panic:-( too.
> IMO, That flag is not the cause of the panics and that it should(tm)
> work without requiring GIANT...
> I think it is possible that the kqemu code is freeing a page without
> unlocking it so that when another process does file IO which requires
> pages to be allocated, attempts to wire those pages results in failure
> and so a panic occurrs.
> Perhaps if a different method for allocating memory rather than
> contigmalloc/contigfree should be used by the kernel module.
Hummm... I can't fix this issue. Please, please:-).
> <snip>
> Offtopic - but am I the only person who has modified the if_tap driver
> to permit opening by non-superuser?
Did you modify if_tap driver? I didn't, I set follwoing setting.
1. Add following lines to /etc/devfs.conf
# Allow a user in the wheel group to query the if_tap device
perm tap* 0660
2. Add following line to /etc/sysctl.conf
net.link.tap.user_open=1
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