Date: Thu, 17 May 2007 14:08:07 -0400 From: "Andrew Edwards" <aedwards@sandvine.com> To: <freebsd-performance@freebsd.org>, <freebsd-fs@freebsd.org> Subject: RE: Ufs dead-locks on freebsd 6.2 Message-ID: <5230D3C40B842D4F9FB3CD368021BEF72F090E@exchange-2.sandvine.com> In-Reply-To: <20070517174735.GB41395@deviant.kiev.zoral.com.ua>
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When I initially built my kernel it was from a fresh copy of 6.2-release which I then sync'd to 6-stable and I used cvsup to do it so I believe it should be clean. I will look into running memtest86 on it to see if anything had happened to the memory. > -----Original Message----- > From: Kostik Belousov [mailto:kostikbel@gmail.com]=20 > Sent: Thursday, May 17, 2007 1:48 PM > To: Andrew Edwards > Cc: freebsd-performance@freebsd.org; freebsd-fs@freebsd.org > Subject: Re: Ufs dead-locks on freebsd 6.2 >=20 > On Thu, May 17, 2007 at 01:03:37PM -0400, Andrew Edwards wrote: > > Here it is. > >=20 > > db> show vnode 0xccd47984 > > vnode 0xccd47984: tag ufs, type VDIR > > usecount 5135, writecount 0, refcount 5137 mountedhere 0 > > flags (VV_ROOT) > > v_object 0xcd02518c ref 0 pages 1 > > #0 0xc0593f0d at lockmgr+0x4ed > > #1 0xc06b8e0e at ffs_lock+0x76 > > #2 0xc0739787 at VOP_LOCK_APV+0x87 > > #3 0xc0601c28 at vn_lock+0xac > > #4 0xc05ee832 at lookup+0xde > > #5 0xc05ee4b2 at namei+0x39a > > #6 0xc05e2ab0 at unp_connect+0xf0 > > #7 0xc05e1a6a at uipc_connect+0x66 > > #8 0xc05d9992 at soconnect+0x4e > > #9 0xc05dec60 at kern_connect+0x74 > > #10 0xc05debdf at connect+0x2f > > #11 0xc0723e2b at syscall+0x25b > > #12 0xc070ee0f at Xint0x80_syscall+0x1f > >=20 > > ino 2, on dev amrd0s1a > It seems to be the sort of things that cannot happen.=20 > VOP_LOCK() returned 0, but vnode was not really locked. >=20 > Although claiming that kernel code cannot have such bug is=20 > too optimistic, I would first make sure that: > 1. You checked the memory of the machine. > 2. Your kernel is built from pristine sources. >=20 > >=20 > > > -----Original Message----- > > > From: Kostik Belousov [mailto:kostikbel@gmail.com] > > > Sent: Thursday, May 17, 2007 1:01 PM > > > To: Andrew Edwards > > > Cc: freebsd-performance@freebsd.org; freebsd-fs@freebsd.org > > > Subject: Re: Ufs dead-locks on freebsd 6.2 > > >=20 > > > On Thu, May 17, 2007 at 11:44:15AM -0400, Andrew Edwards wrote: > > > > I've upgraded to 6-stable, added the kernel options as per > > > the kernel > > > > handbook. After about 5 hours of they system in a deadlock > > > it panic'd. > > > > Here's the backtrace, and show pcpu, show allpcpu, show locks,=20 > > > > show alllocks, show lockedvnods and alltrace. > > > >=20 > > > > I will have the system down for approx another 15-20mins if=20 > > > > there's anything else someone would like while I'm in=20 > the debugger. > > > >=20 > > > >=20 > > > > db> bt > > > > Tracing pid 46784 tid 105112 td 0xd44a8000 > > > > kdb_enter(c0785f13) at kdb_enter+0x2b > > > > vfs_badlock(c0785f2c,c0786051,ccd47984) at vfs_badlock+0x47 > > > > assert_vop_locked(ccd47984,c0786051) at assert_vop_locked+0x4a > > > > vop_lock_post(f9f709dc,0,1002,ccd47984,f9f709f8,...) at=20 > > > > vop_lock_post+0x2a > > > > VOP_LOCK_APV(c07dc2e0,f9f709dc) at VOP_LOCK_APV+0xa0 > > > > vn_lock(ccd47984,1002,d44a8000) at vn_lock+0xac > > > > lookup(f9f70c08) at lookup+0xde > > > > namei(f9f70c08) at namei+0x39a > > > > unp_connect(d44b2de8,d44dc380,d44a8000,d44b2de8,25,...) at=20 > > > > unp_connect+0xf0 > > > > uipc_connect(d44b2de8,d44dc380,d44a8000) at uipc_connect+0x66 > > > > soconnect(d44b2de8,d44dc380,d44a8000) at soconnect+0x4e > > > > kern_connect(d44a8000,7,d44dc380,d44dc380,0,...) at > > > kern_connect+0x74 > > > > connect(d44a8000,f9f70d04) at connect+0x2f > > > > syscall(3b,805003b,bfbf003b,bfbfd920,bfbfd922,...) at=20 > > > > syscall+0x25b > > > > Xint0x80_syscall() at Xint0x80_syscall+0x1f > > >=20 > > > Could you, please, do the "show vnode 0xccd47984" from=20 > ddb prompt or=20 > > > "p/x *(struct vnode *)0xccd47984" from kgdb using dump for this=20 > > > panic ? > > >=20 > > > Side note: it seems that on HEAD, vnode_if.awk does not generate=20 > > > call to vop_lock_{pre,post} due to mismatch in the name=20 > of vop and=20 > > > pre/post names. > > >=20 > > >=20 > > >=20 > > _______________________________________________ > > freebsd-fs@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > > To unsubscribe, send any mail to=20 > "freebsd-fs-unsubscribe@freebsd.org" >=20
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