Date: Thu, 7 May 2015 14:08:21 +0200 From: Johan Schuijt-Li <johan@300.nl> To: freebsd-stable@freebsd.org Subject: panic: pmap active 0xfffff8001b7154b8 Message-ID: <C8964592-7239-4988-AA80-D3634143A5C4@300.nl>
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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>; Are other people aware of this issue or working on this? I can provide access to a VM with a kernel dump and the kernel build for extra information if needed. - Johan
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