Date: Thu, 1 Sep 2005 17:39:38 -0700 (PDT) From: Don Lewis <truckman@FreeBSD.org> To: jhb@FreeBSD.org Cc: freebsd-current@FreeBSD.org, rwatson@FreeBSD.org, dandee@volny.cz, bzeeb-lists@lists.zabbadoz.net, fli+freebsd-current@shapeshifter.se, imp@bsdimp.com Subject: Re: LOR route vr0 Message-ID: <200509020039.j820dcst021990@gw.catspoiler.org> In-Reply-To: <200509011332.24342.jhb@FreeBSD.org>
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On 1 Sep, John Baldwin wrote: > On Thursday 01 September 2005 01:22 pm, Don Lewis wrote: >> On 1 Sep, Fredrik Lindberg wrote: >> > I'm seeing both the rentry and the tcpinp LORs on my fxp interface >> > on a machine running a few days old -current (Aug 25). >> > >> > lock order reversal >> > 1st 0xc1e30d38 inp (tcpinp) @ /usr/src/sys/netinet/tcp_input.c:742 >> > 2nd 0xc1b74018 fxp0 (network driver) @/usr/src/sys/dev/fxp/if_fxp.c:1172 >> > >> > lock order reversal >> > 1st 0xc1e06bb8 rtentry (rtentry) @ /usr/src/sys/net/route.c:1269 >> > 2nd 0xc1b74018 fxp0 (network driver) @/usr/src/sys/dev/fxp/if_fxp.c:1172 >> > >> > As for their backtraces they are almost identical to the >> > once already posted. >> >> Are you using any applications that use multicast? Can you break into >> DDB and capture the output of "show witness"? > > Also, are you using DEVICE_POLLING? I can reproduce this if I add DEVICE_POLLING to my kernel. And I see Giant under "network driver" in the output of "show witness". If I apply your witness patch: http://www.FreeBSD.org/~jhb/patches/witness.patch then I get the following LOR: lock order reversal 1st 0xc23e2018 fxp0 (network driver) @ /usr/src/sys/dev/fxp/if_fxp.c:1907 2nd 0xc09387e0 Giant (Giant) @ /usr/src/sys/kern/kern_poll.c:460 KDB: stack backtrace: kdb_backtrace(0,ffffffff,c0946470,c0947f28,c08d3a84) at kdb_backtrace+0x29 witness_checkorder(c09387e0,9,c086d0d3,1cc) at witness_checkorder+0x53c _mtx_lock_flags(c09387e0,0,c086d0d3,1cc) at _mtx_lock_flags+0x5b ether_poll_deregister(c23de000,c23e2000,c23e2018,0,e9295b60) at ether_poll_deregister+0x1d fxp_stop(c23e2000,c23e2018,1,c084c9ff,787) at fxp_stop+0x21 fxp_init_body(c23e2000,c23e2018,0,c084c9ff,773) at fxp_init_body+0x31 fxp_init(c23e2000,8020690c,c23e2000,c264bb00,e9295bc0) at fxp_init+0x23 ether_ioctl(c23de000,8020690c,c264bb00,0,c264bb00) at ether_ioctl+0x50 fxp_ioctl(c23de000,8020690c,c264bb00,1,c0a86503) at fxp_ioctl+0x232 in_ifinit(c23de000,c264bb00,c24b3490,0,e9295c38) at in_ifinit+0x206 in_control(c270fde8,8040691a,c24b3480,c23de000,c248e900) at in_control+0x882 ifioctl(c270fde8,8040691a,c24b3480,c248e900,0) at ifioctl+0x198 soo_ioctl(c2647dc8,8040691a,c24b3480,c2271d00,c248e900) at soo_ioctl+0x2db ioctl(c248e900,e9295d04,3,1,286) at ioctl+0x370 syscall(3b,3b,3b,8056e40,8059140) at syscall+0x22f Xint0x80_syscall() at Xint0x80_syscall+0x1f --- syscall (54, FreeBSD ELF32, ioctl), eip = 0x48136e4b, esp = 0xbfbfe5ec, ebp = 0xbfbfee38 --- fxp0: link state changed to UP I also get another LOR: cd0: Attempt to query device size failed: NOT READY, Medium not present lock order reversal 1st 0xe35e0cc4 g_xdown (g_xdown) @ /usr/src/sys/geom/geom_io.c:465 2nd 0xc09387e0 Giant (Giant) @ /usr/src/sys/geom/geom_disk.c:99 KDB: stack backtrace: kdb_backtrace(0,ffffffff,c0945e30,c0947f28,c08d3a84) at kdb_backtrace+0x29 witness_checkorder(c09387e0,9,c0866bc0,63) at witness_checkorder+0x53c _mtx_lock_flags(c09387e0,0,c0866bc0,63) at _mtx_lock_flags+0x5b g_disk_start(c2632a50,e35e0cc4,0,c086722e,1d1) at g_disk_start+0x152 g_io_schedule_down(c2275480) at g_io_schedule_down+0x160 g_down_procbody(0,e35e0d38,0,c0606960,0) at g_down_procbody+0x5a fork_exit(c0606960,0,e35e0d38) at fork_exit+0xa0 fork_trampoline() at fork_trampoline+0x8 --- trap 0x1, eip = 0, esp = 0xe35e0d6c, ebp = 0 --- Trying to mount root from ufs:/dev/da0s1a
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