Re: -CURRENT kernel panic

On Thu, 4 Mar 2004, Andrew Gallatin wrote:

>
> Vincent Poy writes:
>  > On Thu, 4 Mar 2004, Andrew Gallatin wrote:
>  >
>  > 	Interesting.  I'm still wondering what the VM_KMEM_SIZE_SCALE
>  > number represents.
>
> It tries to autoscale the kmem size, so that you don't need to hard
> code it.  Hardcoding it could be bad if you change the amount of ram
> in the box.

	That part I understand but what exactly does the number 2 and 3
mean?

>  > >  > > Even after bumping the limits, I'm seeing a repeatable panic when
>  > >  > > allocating a large amount of kernel memory ("panic: pmap_enter:
>  > >  > > attempted pmap_enter on 4MB page").  See yesterday's message
>  > >  > > with that subject for details..
>  > >  >
>  > >  > 	Just checked the archives and yours seems to jhave more variables
>  > >  > than mines from the panic message.
>  > >
>  > > Can you describe the panic you see?
>  >
>  > 	Everything including buildworld doesn't cause the panic except at
>  > 4AM at night when I do a dump | restore of the /usr partition which shows
>  > just this:
>  >
>  > panic: kmem_malloc (4096): kmem_map too small: 377487360 total allocated
>  >        at line 341 in file /usr/src/sys/vm/vm_kern.c
>
> According to this, your kmem map size is too small.  (360MB).
> What does sysctl vm.kmem_size show?  377487360?

vince_at_bigbang [2:07pm][~] >> sysctl vm.kmem_size
vm.kmem_size: 209715200

> Try bumping it up  via vm.kmem_size=805306368 /boot/loader.conf

	Just tried that but for some reason, the number doesn't set.

vince_at_bigbang [2:12pm][~] >> sysctl vm.kmem_size
vm.kmem_size: 209715200

vince_at_bigbang [2:12pm][~] >> cat /boot/loader.conf
hw.ata.wc="1"
snd_ich_load="YES"
acpi_dsdt_load="YES"
acpi_dsdt_name="/boot/acpi_dsdt.aml
agp_load="YES"
nvidia_load="YES"
vm.kmem_size="805306368"

	Does it have to be in a certain order?  Since I had the same
problem when setting kern.ipc.nmbclusters where it didn't work either.


Cheers,
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