On Fri, Nov 25, 2011 at 01:20:01PM -0600, Mark Felder wrote: > 13:14:32 nas:~ > uname -a > FreeBSD nas.feld.me 9.0-PRERELEASE FreeBSD 9.0-PRERELEASE #3 r227971M: > Fri Nov 25 10:07:48 CST 2011 > r...@nas.feld.me:/usr/obj/tank/svn/sys/GENERIC amd64 > > This seemed to start happening sometime after RC1. I tried 8-STABLE and > it's happening there too right now. I think whatever caused this was > MFC'd. I've also reproduced this on completely different hardware > running a single disk ZFS pool. > > > I'm getting this output in dmesg after these hangs I keep seeing.
Mark, those backtrace are not related to ZFS, but to PF. Not sure if they are at all related to your hangs. Most cases where ZFS I/O seems to hang are hardware problems, where I/O requests are not completed. 'procstat -kk -a' output might be useful once the hang happens. > uma_zalloc_arg: zone "pfrktable" with the following non-sleepable locks > held: > exclusive sleep mutex pf task mtx (pf task mtx) r = 0 > (0xffffffff8199af20) locked @ > /tank/svn/sys/modules/pf/../../contrib/pf/net/pf_ioctl.c:1589 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > kdb_backtrace() at kdb_backtrace+0x37 > _witness_debugger() at _witness_debugger+0x2e > witness_warn() at witness_warn+0x2c4 > uma_zalloc_arg() at uma_zalloc_arg+0x335 > pfr_create_ktable() at pfr_create_ktable+0xd8 > pfr_ina_define() at pfr_ina_define+0x12b > pfioctl() at pfioctl+0x1c5a > devfs_ioctl_f() at devfs_ioctl_f+0x7a > kern_ioctl() at kern_ioctl+0xcd > sys_ioctl() at sys_ioctl+0xfd > amd64_syscall() at amd64_syscall+0x3ac > Xfast_syscall() at Xfast_syscall+0xf7 > --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x800da711c, rsp = > 0x7fffffff9d28, rbp = 0x7fffffffa1f0 --- -- Pawel Jakub Dawidek http://www.wheelsystems.com FreeBSD committer http://www.FreeBSD.org Am I Evil? Yes, I Am! http://yomoli.com
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