On Jul 29, 2009, at 15:55, Andriy Gapon wrote: > on 29/07/2009 16:52 Thomas Backman said the following: >>> >>> It would be useful to get line number in frame 13 and examine sx >>> object in frame >>> 11, esp. sx_lock field. >>> >>> -- >>> Andriy Gapon >> The "this" (above) was referring to variable values not being >> available >> in a vmcore. :) >> >> The zfs module appears to be built with symbols, and the symbols >> appear >> to be loaded in kgdb: >> >> Reading symbols from /boot/kernel/zfs.ko...Reading symbols from >> /bootdir/boot/kernel/zfs.ko.symbols...done. done. >> Loaded symbols for /boot/kernel/zfs.ko >> Reading symbols from /boot/kernel/opensolaris.ko...Reading symbols >> from >> /bootdir/boot/kernel/opensolaris.ko.symbols...done. done. >> Loaded symbols for /boot/kernel/opensolaris.ko >> >> I didn't build the module(s) individually, either; in the previous >> cases, it was a clean buildworld/buildkernel (even with rm -rf >> /usr/obj/* beforehand), and in this case "just" a buildkernel (no >> manual >> cleaning, but no -DNO_CLEAN either). > > Got it. No idea unfortunately :( > Could you still please examine sx in frame 11? Maybe... ;) If this isn't right, just tell me how: (kgdb) fr 11 #11 0xffffffff80342b99 in _sx_xlock_hard (sx=0xffffff00090d5018, tid=18446742974952890368, opts=Variable "opts" is not available. ) at /usr/src/sys/kern/kern_sx.c:575 575 owner = (struct thread *)SX_OWNER(x); (kgdb) list 570 * chain lock. If so, drop the sleep queue lock and try 571 * again. 572 */ 573 if (!(x & SX_LOCK_SHARED) && 574 (sx->lock_object.lo_flags & SX_NOADAPTIVE) == 0) { 575 owner = (struct thread *)SX_OWNER(x); 576 if (TD_IS_RUNNING(owner)) { 577 sleepq_release(&sx- >lock_object); 578 continue; 579 } (kgdb) p sx $3 = (struct sx *) 0xffffff00090d5018 (kgdb) x/x sx 0xffffff00090d5018: 0xffffffff80b5634c (kgdb) p *sx $8 = {lock_object = {lo_name = 0xffffffff80b5634c "zp->z_lock", lo_flags = 40894464 [0x2700000, btw], lo_data = 0, lo_witness = 0x0}, sx_lock = 6} ... as you might notice, I'm mostly clueless as to what I'm doing here. :o Hope that helps (a bit), though. Regards, ThomasReceived on Wed Jul 29 2009 - 12:11:06 UTC
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