Re: panic when booting HEAD on i386
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On Sun, Apr 21, 2013 at 01:57:03PM +0800, Ganbold Tsagaankhuu wrote:
> On Sat, Apr 20, 2013 at 11:21 PM, Konstantin Belousov
> <kostikbel@gmail.com>wrote:
>=20
> > On Sat, Apr 20, 2013 at 10:52:35PM +0800, Ganbold Tsagaankhuu wrote:
> > > Hi,
> > >
> > > I'm trying to boot HEAD after updating, but unfortunately it panics w=
ith
> > > following message:
> > >
> > > panic: kmem_suballoc: bad status return of 3.
> > >
> > > I was only able to get image of the panic.
> > >
> > > http://www.mnbsd.org/ganbold/IMG_20130420_222353-2.jpg
> > >
> > > Does anybody see same panic booting on i386 lately?
> > > Tried clang, and it panics also.
> >
> > How much memory do you have ?
> > Do you have any tunables in the loader.conf ?
> >
>=20
> Following settings caused the panic:
>=20
> vm.kmem_size=3D"999M"
> vm.kmem_size_max=3D"999M"
I cannot imagine how this could work earlier as well, except by chance.
>=20
> Whether it is regression or not in previous version of kernel (r244046) it
> didn't panic on boot.
> Seems no information on UPDATING either.
Do you propose to enumerate all non-working or panic-provoking settings in
loader.conf ?
Why did you set this value at all ?
KVA on i386 is limited to slightly less then 1GB, where all the kernel
maps must be instantiated. Kernel uses the value of the tunable
vm.kmem_size literally, except it makes a mild attempt to prevent
foot-shooting by capping kmem_size to 2 * physical memory size.
You neglected to answer how much memory is installed on your machine,
but I suspect you have enough so that overblown kmem_map cannot coexists
with other kernel VA consumers.
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