Date: Mon, 30 Apr 2007 14:33:49 -0400 From: John Baldwin <jhb@freebsd.org> To: Lars Engels <lars.engels@0x20.net> Cc: freebsd-current@freebsd.org Subject: Re: cardbus not powered when ACPI is enabled Message-ID: <200704301433.50330.jhb@freebsd.org> In-Reply-To: <20070430175445.GB88409@e.0x20.net> References: <20070423193112.GU46992@e.0x20.net> <200704301336.41897.jhb@freebsd.org> <20070430175445.GB88409@e.0x20.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Monday 30 April 2007 01:54:46 pm Lars Engels wrote:
> On Mon, Apr 30, 2007 at 01:36:41PM -0400, John Baldwin wrote:
> > On Monday 30 April 2007 01:02:04 pm Lars Engels wrote:
> > > On Mon, Apr 30, 2007 at 12:08:58PM -0400, John Baldwin wrote:
> > > > On Friday 27 April 2007 04:57:52 pm Lars Engels wrote:
> > > > > On Thu, Apr 26, 2007 at 05:45:50PM -0400, John Baldwin wrote:
> > > > >
> > > > > I also encountered occasional "Panic: failed to create swap zone"
when
> > > > > CPU #1 was launched just before the disks get mounted. Could that be
> > > > > related?
> > > >
> > > > Ok, so for the default setup, the only problem is that panic? That
sounds
> > > > like running out of kvm possibly as the swapzone is preallocated from
> > kmem.
> > > > The system may be allocating too much for the swapzone, in which case
you
> > can
> > > > explicitly set the size via the 'kern.maxswzone' tunable. One
possible
> > > > formula for this is:
> > > >
> > > > maxswzone = (swap + 1024) * 1024 * 9 / 2
> > > >
> > > > Where 'swap' is the amount of swap in megabytes.
> > >
> > > I added kern.maxswzone=13953024 (2004 MB swap) to loader.conf but after
> > > a reboot the oid is still unknown. Do I need to set it somewhere else?
> >
> > Unfortunately, it's just a tunable, there isn't a sysctl to see the
current
> > setting. You can, however, look at the 'vmstat -z' output. You can
figure
> > out the current swap zone size by multiplying the size and limit columns
> > for 'SWAPMETA'. Something like this:
> >
> > vmstat -z | awk '/^SWAPMETA/ { printf "%d\n", $2 * $3 }' | bc
>
> There's a difference of 120 bytes between the vmstat output and
> maxswzone. Is that normal?
Yes. The swapzone objects are about ~280 bytes or so.
> But I think the panics are gone now. I booted five times with the
> cardbus card inserted when cpu #1 was launched and there was no panic.
Ok.
--
John Baldwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200704301433.50330.jhb>