Date: Fri, 17 Oct 2014 10:59:18 -0700 From: Navdeep Parhar <np@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: panic in ivy_rng_store() when compiled with -O0 Message-ID: <20141017175918.GA6074@ox> In-Reply-To: <2533199.DHZybpy49d@ralph.baldwin.cx> References: <54384ABD.5080806@FreeBSD.org> <2533199.DHZybpy49d@ralph.baldwin.cx>
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On Fri, Oct 17, 2014 at 11:53:58AM -0400, John Baldwin wrote: > On Friday, October 10, 2014 02:08:13 PM Navdeep Parhar wrote: > > I built my kernel + modules (head as of today) with -O0 and now it > > panics during boot. I did bump up KSTACK_PAGES significantly so that's > > not the problem. I'm going to take out the RNG device next and see if I > > can get past this. > > > > Regards, > > Navdeep > > > > Fatal trap 9: general protection fault while in kernel mode > > cpuid = 0; apic id = 00 > > instruction pointer = 0x20:0xffffffff814ac661 > > stack pointer = 0x28:0xfffffe01ed6c6930 > > frame pointer = 0x28:0xfffffe01ed6c6960 > > code segment = base 0x0, limit 0xfffff, type 0x1b > > = DPL 0, pres 1, long 1, def32 0, gran 1 > > processor eflags = interrupt enabled, resume, IOPL = 0 > > current process = 14 (rand_harvestq) > > [ thread pid 14 tid 100017 ] > > Stopped at ivy_rng_store+0x31: movq %rdi,(%rdi) > > db> bt > > Tracing pid 14 tid 100017 td 0xfffff800042c84c0 > > ivy_rng_store() at ivy_rng_store+0x31/frame 0xfffffe01ed6c6960 > > random_ivy_read() at random_ivy_read+0x78/frame 0xfffffe01ed6c6990 > > live_entropy_sources_feed() at live_entropy_sources_feed+0x73/frame > > 0xfffffe01ed6c69d0 > > random_kthread() at random_kthread+0x224/frame 0xfffffe01ed6c6a30 > > fork_exit() at fork_exit+0x14a/frame 0xfffffe01ed6c6ab0 > > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe01ed6c6ab0 > > --- trap 0, rip = 0, rsp = 0xfffffe01ed6c6b70, rbp = 0 --- > > Can you 'p $rdi'? I don't have this core around any more. The problem was fixed in r273027. Navdeep
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