panic: pmap active 0xfffff8001b7154b8

[Bryan Drewery]

On 5/7/2015 10:06 AM, Bryan Drewery wrote:
> On 5/7/2015 7:08 AM, Johan Schuijt-Li wrote:
>> Hi,
>>
>> We’ve been seeing (seemingly) random reboots on 10.1-RELEASE virtual machines (KVM virtualisation) on our production servers. In an attempt to determine what was causing this we’ve switched to running a kernel with INVARIANTS enabled. This resulted for us in the following panic:
>>
>> Unread portion of the kernel message buffer:
>> panic: pmap active 0xfffff8001b7154b8
>> cpuid = 3
>> KDB: stack backtrace:
>> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe03dd1493a0
>> kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe03dd149450
>> vpanic() at vpanic+0x126/frame 0xfffffe03dd149490
>> kassert_panic() at kassert_panic+0x139/frame 0xfffffe03dd149500
>> pmap_remove_pages() at pmap_remove_pages+0x8c/frame 0xfffffe03dd1495f0
>> exec_new_vmspace() at exec_new_vmspace+0x16a/frame 0xfffffe03dd149650
>> exec_elf64_imgact() at exec_elf64_imgact+0x658/frame 0xfffffe03dd149720
>> kern_execve() at kern_execve+0x5e4/frame 0xfffffe03dd149a80
>> sys_execve() at sys_execve+0x37/frame 0xfffffe03dd149ae0
>> amd64_syscall() at amd64_syscall+0x25a/frame 0xfffffe03dd149bf0
>> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe03dd149bf0
>> --- syscall (59, FreeBSD ELF64, sys_execve), rip = 0x80158af1a, rsp = 0x7fffffffac38, rbp = 0x7fffffffad40 ---
>>
>>
>> I’ve only come across one other report here (without result unfortunate):
>> https://lists.freebsd.org/pipermail/freebsd-current/2014-June/050827.html <https://lists.freebsd.org/pipermail/freebsd-current/2014-June/050827.html>
>>
> 
> I looked around for the conclusion of that thread but could not find it.

Found it. https://svnweb.freebsd.org/base?view=revision&revision=271000

This fix is in 10.1-RELEASE, so yours must be a little different.

-- 
Regards,
Bryan Drewery

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