On Mon, Dec 10, 2012 at 01:38:21PM -0500, Rick Macklem wrote: > Adrian Chadd wrote: > > .. what was the previous kernel version? > > > Hopefully Tim has it narrowed down more, but I don't see > the hangs on a Sept. 7 kernel from head and I do see them > on a Dec. 3 kernel from head. (Don't know the eact rNNNNNN.) > > It seems to predate my commit (r244008), which was my first > concern. > > I use old single core i386 hardware and can fairly reliably > reproduce it by doing a kernel build and a "svn checkout" > concurrently. No NFS activity. These are running on a local > disk (UFS/FFS). (The kernel I reproduce it on is built via > GENERIC for i386. If you want me to start a "binary search" > for which rNNNNNN, I can do that, but it will take a while.:-) > > I can get out into DDB, but I'll admit I don't know enough > about it to know where to look;-) > Here's some lines from "db> ps", in case they give someone > useful information. (I can leave this box sitting in DB for > the rest of to-day, in case someone can suggest what I should > look for on it.) > > Just snippets... > Ss pause adjkerntz > DL sdflush [sofdepflush] > RL [syncer] > DL vlruwt [vnlru] > DL psleep [bufdaemon] > RL [pagezero] > DL psleep [vmdaemon] > DL psleep [pagedaemon] > DL ccb_scan [xpt_thrd] > DL waiting_ [sctp_iterator] > DL ctl_work [ctl_thrd] > DL cooling [acpi_cooling0] > DL tzpoll [acpi_thermal] > DL (threaded) [usb] > ... > DL - [yarrow] > DL (threaded) [geom] > D - [g_down] > D - [g_up] > D - [g_event] > RL (threaded) [intr] > I [irq15: ata1] > ... > Run CPU0 [swi6: Giant taskq] > --> does this one indicate the CPU is actually running this? > (after a db> cont, wait a while <ctrl><alt><esc> db> ps > it is still the same) > I [swi4: clock] > I [swi1: netisr 0] > I [swi3: vm] > RL [idle: cpu0] > SLs wait [init] > DL audit_wo [audit] > DLs (threaded) [kernel] > D - [deadlkres] > ... > D sched [swapper] > > I have no idea if this "ps" output helps, unless it indicates > that it is looping on the Giant taskq? Might be. You could do 'bt <pid>' for the process to see where it loops. Another good set of hints is at http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html > > As I said, I can leave it in "db" for to-day, if anyone wants > me to do anything in the debugger and I can probably reproduce > it, if someone wants stuff tried later. > > rick > > > > > > > > adrian > > > > > > On 9 December 2012 22:08, Tim Kientzle <kientzle_at_freebsd.org> wrote: > > > I haven't found any useful clues yet, but thought I'd ask if anyone > > > else > > > was seeing hangs in a recent kernel. > > > > > > I just upgraded to r244036 using a straight GENERIC i386 kernel. > > > (Straight buildworld/buildkernel, no local changes, /etc/src.conf > > > doesn't > > > exist, /etc/make.conf just has PERL_VERSION defined.) > > > > > > When I try to cross build an ARM world on the resulting system, > > > the entire system hangs hard after about 30 minutes: No network, > > > no keyboard response, no nothing. > > > > > > Don't know if it's relevant, but the system is using NFS pretty > > > heavily (Parallels VM mounting NFS from Mac OS 10.7 host.) > > > > > > I'll try to get some more details ... > > > > > > Tim > > > > > > _______________________________________________ > > > freebsd-current_at_freebsd.org mailing list > > > http://lists.freebsd.org/mailman/listinfo/freebsd-current > > > To unsubscribe, send any mail to > > > "freebsd-current-unsubscribe_at_freebsd.org" > > _______________________________________________ > > freebsd-current_at_freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-current > > To unsubscribe, send any mail to > > "freebsd-current-unsubscribe_at_freebsd.org" > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"
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