----- Original Message ----- > Hi, > this host (used as a zfs server), was working since 8.2, actually was working > nicely under 9.1, but after upgrading to the latest 9.2, it panics, 2 days > in a row. Appart of being a newer version, it's now dataless while I run it > through the loops - which could be the reason for the panics, so while I > prepare > it to run off a local disk, and see if that mitigates the problem, > could someone take a look? > > Fatal trap 12: page fault while in kernel mode > cpuid = 21; apic id = 25 > fault virtual address = 0xfffffffffffffcc0 > fault code = supervisor read data, page not present > instruction pointer = 0x20:0xffffffff80d17f66 > stack pointer = 0x28:0xffffff8d77b415b0 > frame pointer = 0x28:0xffffff8d77b415f0 > 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 = 89 (txg_thread_enter) > trap number = 12 > panic: page fault > cpuid = 21 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a/frame > 0xffffff8d77b41040 > kdb_backtrace() at kdb_backtrace+0x37/frame 0xffffff8d77b41100 > panic() at panic+0x1ce/frame 0xffffff8d77b41200 > trap_fatal() at trap_fatal+0x290/frame 0xffffff8d77b41260 > trap_pfault() at trap_pfault+0x211/frame 0xffffff8d77b412f0 > trap() at trap+0x344/frame 0xffffff8d77b414f0 > calltrap() at calltrap+0x8/frame 0xffffff8d77b414f0 > --- trap 0xc, rip = 0xffffffff80d17f66, rsp = 0xffffff8d77b415b0, rbp = > 0xffffff8d77b415f0 --- > bcopy() at bcopy+0x16/frame 0xffffff8d77b415f0 > kthread_add() at kthread_add+0xe4/frame 0xffffff8d77b41710 > kproc_kthread_add() at kproc_kthread_add+0xe1/frame 0xffffff8d77b418c0 > spa_sync() at spa_sync+0x8d1/frame 0xffffff8d77b41990 > txg_sync_thread() at txg_sync_thread+0x139/frame 0xffffff8d77b41aa0 > fork_exit() at fork_exit+0x11f/frame 0xffffff8d77b41af0 > fork_trampoline() at fork_trampoline+0xe/frame 0xffffff8d77b41af0 > --- trap 0, rip = 0, rsp = 0xffffff8d77b41bb0, rbp = 0 --- > Uptime: 21h5m46s >
The serialization in kthread_add() is wrong. It is possible for the oldtd it selects to exit and be reaped before we are able duplicate the copy region. I have a local patch for this, and I talked with julian@ & jhb@ about it a few weeks ago but haven't sent them a patch for review. I'll get to that later today. > more info at: > ftp://ftp.cs.huji.ac.il/users/danny/freebsd/core.txt/1 > > thanks, > danny > > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org" > _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
