Date: Sat, 09 Jul 2016 18:30:00 -0700 From: Matthew Macy <mmacy@nextbsd.org> To: "Andrey Chernov" <ache@freebsd.org> Cc: "current@freebsd.org" <current@FreeBSD.org> Subject: Re: Recent -current stable panic at later boot stage Message-ID: <155d26ce8c4.12248bbba219469.8811983805604406181@nextbsd.org> In-Reply-To: <8c432d68-a3c8-2f39-8429-f1fe920d002b@freebsd.org> References: <378f847e-3257-19f0-2cf8-cd6319db5e06@freebsd.org> <8c432d68-a3c8-2f39-8429-f1fe920d002b@freebsd.org>
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---- On Sat, 09 Jul 2016 18:19:57 -0700 Andrey Chernov <ache@freebsd.org> wrote ---- > BTW, it never happens with 11-ALPHA3 even with world build for 12. > > On 09.07.2016 22:06, Andrey Chernov wrote: > > SCHED_ULE used. I have textdump only. Interesting parts: > > <118>Starting syslogd. > > kernel trap 9 with interrupts disabled > > > > Fatal trap 9: general protection fault while in kernel mode > > cpuid = 7; apic id = 07 > > instruction pointer = 0x20:0xffffffff806b2585 > > stack pointer = 0x28:0xfffffe022ccce8d0 > > frame pointer = 0x28:0xfffffe022ccce950 > > code segment = base 0x0, limit 0xfffff, type 0x1b > > = DPL 0, pres 1, long 1, def32 0, gran 1 > > processor eflags = resume, IOPL = 0 > > current process = 10 (idle: cpu7) > > > > It happens at amd64/amd64/cpu_switch.S:ld_ldt: lldt %ax > > > > db> bt > > > > Tracing pid 10 tid 100009 td 0xfffff80002292000 > > ld_ldt() at ld_ldt/frame 0xfffffe022ccce8e0 > > sched_switch() at sched_switch+0x51d/frame 0xfffffe022ccce950 > > mi_switch() at mi_switch+0x156/frame 0xfffffe022ccce980 > > sched_idletd() at sched_idletd+0xf9/frame 0xfffffe022cccea70 > > fork_exit() at fork_exit+0x84/frame 0xfffffe022ccceab0 > > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe022ccceab0 > > --- trap 0, rip = 0, rsp = 0, rbp = 0 --- Have their been no other stability issues on this machine? At first glance it looks like the ldt got corrupted. Is there no way to inspect that? -M
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