Date: Fri, 19 Oct 2018 13:10:15 +0200 From: Sebastian Wojtczak <sebastian.wojtczak@gmail.com> To: freebsd-stable@freebsd.org Subject: FreeBSD 11.2 kernel crash when dd Message-ID: <CAEfQnDmWE8mq8=XqvPu3zn0S0kOka274T7O7_GXXT=Xg3ObcgA@mail.gmail.com>
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Hi, I would like to report a kernel crash while dd on ssd drive. Just found that my PC crashed several times during below command: dd if=/dev/ada2 of=file_name bs=10m. I was trying to make an image from my ssd drive. Once dump file hit size 41G or 52G kernel crashes and reboot the system. Oct 18 12:30:11 username syslogd: kernel boot file is /boot/kernel/kernel Oct 18 12:30:11 username kernel: Oct 18 12:30:11 username kernel: Oct 18 12:30:11 username kernel: Fatal trap 12: page fault while in kernel mode Oct 18 12:30:11 username kernel: cpuid = 1; apic id = 01 Oct 18 12:30:11 username kernel: fault virtual address = 0x5a Oct 18 12:30:11 username kernel: fault code = supervisor read data, page not present Oct 18 12:30:11 username kernel: instruction pointer = 0x20:0xffffffff80e67f6d Oct 18 12:30:11 username kernel: stack pointer = 0x28:0xfffffe084b408f40 Oct 18 12:30:11 username kernel: frame pointer = 0x28:0xfffffe084b408f80 Oct 18 12:30:11 username kernel: code segment = base 0x0, limit 0xfffff, type 0x1b Oct 18 12:30:11 username kernel: = DPL 0, pres 1, long 1, def32 0, gran 1 Oct 18 12:30:11 username kernel: processor eflags = interrupt enabled, resume, IOPL = 0 Oct 18 12:30:11 username kernel: current process = 0 (zio_write_issue_8) Oct 18 12:30:11 username kernel: trap number = 12 Oct 18 12:30:11 username kernel: panic: page fault Oct 18 12:30:11 username kernel: cpuid = 1 Oct 18 12:30:11 username kernel: KDB: stack backtrace: Oct 18 12:30:11 username kernel: #0 0xffffffff80b50087 at kdb_backtrace+0x67 Oct 18 12:30:11 username kernel: #1 0xffffffff80b099f7 at vpanic+0x177 Oct 18 12:30:11 username kernel: #2 0xffffffff80b09873 at panic+0x43 Oct 18 12:30:11 username kernel: #3 0xffffffff80fe105f at trap_fatal+0x35f Oct 18 12:30:11 username kernel: #4 0xffffffff80fe10b9 at trap_pfault+0x49 Oct 18 12:30:11 username kernel: #5 0xffffffff80fe0887 at trap+0x2c7 Oct 18 12:30:11 username kernel: #6 0xffffffff80fc04cc at calltrap+0x8 Oct 18 12:30:11 username kernel: #7 0xffffffff80e56df2 at kmem_back+0xf2 Oct 18 12:30:11 username kernel: #8 0xffffffff80e56cd0 at kmem_malloc+0x60 Oct 18 12:30:11 username kernel: #9 0xffffffff80e4e752 at keg_alloc_slab+0xe2 Oct 18 12:30:11 username kernel: #10 0xffffffff80e5118e at keg_fetch_slab+0x14e Oct 18 12:30:11 username kernel: #11 0xffffffff80e509a4 at zone_fetch_slab+0x64 Oct 18 12:30:11 username kernel: #12 0xffffffff80e50a7f at zone_import+0x3f Oct 18 12:30:11 username kernel: #13 0xffffffff80e4d199 at uma_zalloc_arg+0x3d9 Oct 18 12:30:11 username kernel: #14 0xffffffff832d2ab2 at zio_write_compress+0x1e2 Oct 18 12:30:11 username kernel: #15 0xffffffff832d174c at zio_execute+0xac Oct 18 12:30:11 username kernel: #16 0xffffffff80b617e4 at taskqueue_run_locked+0x154 Oct 18 12:30:11 username kernel: #17 0xffffffff80b62918 at taskqueue_thread_loop+0x98 Oct 18 12:30:11 username kernel: Uptime: 5m50s One virtual machine is started with bhyve at startup but even if I shutdown it, same crash happen. Disabling vmm does not help but only extend time to crash during ssd dump. Current zfs setup is zraid on 3 (500GB) hdd drives with compress=on. Drive ada0 is not part of zraid and is not attached/mount what ever. Any help how to investigate it is appreciated.
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