Date: Tue, 29 Nov 2005 12:44:57 -0800 From: Mark Atkinson <atkin901@yahoo.com> To: freebsd-current@freebsd.org Subject: Re: LOR: so_snd @ /usr/src/sys/kern/uipc_socket.c:780 Message-ID: <dmiek9$gih$1@sea.gmane.org> In-Reply-To: <dmicgn$9fs$1@sea.gmane.org> References: <dmicgn$9fs$1@sea.gmane.org>
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Sorry about fat-fingering the title. -current build from this morning. Mark Atkinson wrote: > this one seems new, and doesn't seem to match anything on the known > list. Typed by hand. Single processor, no hyperthreading. The last > thing it was doing was doing a 'test' command on a file over nfs. > > Lock order reversal: > 1st 0xc5ef0ec so_snd (so_snd) @ /usr/src/sys/kern/uipc_socket.c:780 > 2nd 0xc0ac15ec tcp (tcp) @ /usr/src/sys/netinet/tcp_usrreq.c:580 > KDB: stack backstrace: > kdb_backtrace() at kdb_backtrace+0x2e > witness_checkorder() at witness_checkorder+0x6d3 > _mtx_lock_flags() at _mtx_lock_flags+0x8a > tcp_usr_shutdown() at tcp_usr_shutdown+0x3d > soshutdown() at soshutdown+0x41 > nfs_disconnect() at nfs_disconnect+0xd5 > nfs_reconnect() at nfs_reconnect+0x1c > nfs_reply() at nfs_reply+0x170 > nfs_request() at nfs_request+0x451 > nfs3_access_otw() at nfs3_access_otw+0xde > nfs_access() at nfs_access+0x120 > VOP_ACCESS_APV() at VOP_ACCESS_APV+0xac > nfs_lookup() at nfs_lookup+0xe5 > VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0xb4 > lookup() at lookup+0x468 > namei() at namei+0x468 > kern_stat() at kern_stat+0x3d > stat() at stat+0x2f > syscall() at Xint0x80_syscall+0x1f > --- syscall (188, FreeBSD ELF32, stat, eip = 0x2819ad63, esp = > 0xbfbfe8cc, ebp = 0xbfbfe9c8 --- > panic: _mtx_lock_sleep: recursed on non-recursive mutex so_snd @ > /usr/src/sys/kern/uipc_socket.c:391 > > cpuid = 0 > KDB: enter: panic > Stopped at kdb_enter+0x30: leave > db> > db> show alllocks > Process 54517 (sh) thread 0xc5f1fd80 (100100) > exclusive sleep mutex so_snd r = 0 (0xc5aef0ec) locked @ > /usr/src/sys/kern/uipc_socket.c:780 > exclusive sleep mutex Giant r = 0 (0xc0a713c0) locked @ > /usr/src/sys/kern/vfs_lookup.c:619 > Process 54515 (cc1) thread 0xc5eac600 (100093) > exclusive sx user map r = 0 (0xc5fa2170) locked @ > /usr/src/sys/vm/vm_map:2996 > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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