Date: Thu, 4 Mar 2004 09:34:51 -1000 (HST) From: Vincent Poy <vince@oahu.WURLDLINK.NET> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: current@freebsd.org Subject: Re: -CURRENT kernel panic Message-ID: <20040304093201.X8264-100000@oahu.WURLDLINK.NET> In-Reply-To: <16455.33748.860265.157572@grasshopper.cs.duke.edu>
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On Thu, 4 Mar 2004, Andrew Gallatin wrote:
> Vincent Poy writes:
> > On Thu, 4 Mar 2004, Andrew Gallatin wrote:
> >
> > > Just add vm.kmem_size=VALUE to /boot/loader.conf. That way you don't
> > > need to rebuild a kernel. I run with vm.kmem_size=429391872
> >
> > Does that actually work since I thought unless you alter the
> > kernel, it won't use more than 200KB for the kmem_map?
>
> Sure.. read the code (kern/kern_malloc.c:kmeminit) The
> VM_KMEM_SIZE_MAX comes first, then the tunable from the loader.
Interesting. I'm still wondering what the VM_KMEM_SIZE_SCALE
number represents.
> > > 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
cpuid=0;
Debugger("panic")
Stopped at Debugger+0x46: xchgl %ebx, in_Debugger.0
db>
This is from dmesg.out:
CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.60GHz (2592.37-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0xf29 Stepping = 9
Features=0xbfebf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
real memory = 2147360768 (2047 MB)
avail memory = 2095669248 (1998 MB)
Pentium Pro MTRR support enabled
Cheers,
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