Date: Sun, 19 Jun 2005 19:45:34 +0900 From: gnn@freebsd.org To: freebsd-current@freebsd.org Subject: Anyone else seeing this lock reversal? Message-ID: <m2mzpm39rl.wl%gnn@neville-neil.com>
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I'm seeing this during buildkernel on a VMWare VM (vmware 5.0) with the GENERIC kernel as of June 18 2005. Anything else people need to know to diagnose this? Later, George Jun 19 19:45:34 Nightly kernel: Acquiring lockmgr lock "ufs" with the following non-sleepable locks held: Jun 19 19:45:34 Nightly kernel: exclusive sleep mutex vnode pollinfo r = 0 (0xc2298000) locked @ /usr/src/sys/kern/kern_event.c:1224 Jun 19 19:45:34 Nightly kernel: KDB: stack backtrace: Jun 19 19:45:34 Nightly kernel: kdb_backtrace(1,3001,c1cc418c,c1cd4600,d13c9a3c) at kdb_backtrace+0x29 Jun 19 19:45:34 Nightly kernel: witness_warn(5,c0916128,c084cf18,c0855b4c) at witness_warn+0x18e Jun 19 19:45:34 Nightly kernel: lockmgr(c1cc4168,3001,c1cc418c,c1cd4600,d13c9a68) at lockmgr+0x8d Jun 19 19:45:34 Nightly kernel: vop_stdlock(d13c9aac,c08ecae0,d13c9aac,d13c9a78,c076a18c) at vop_stdlock+0x1e Jun 19 19:45:34 Nightly kernel: VOP_LOCK_APV(c08ed020,d13c9aac,d13c9a8c,c07f7fe3,d13c9aac) at VOP_LOCK_APV+0x87 Jun 19 19:45:34 Nightly kernel: ffs_lock(d13c9aac,1001,c1cc4110,d13c9ac8,c068bc90) at ffs_lock+0x10 Jun 19 19:45:34 Nightly kernel: VOP_LOCK_APV(c08ecae0,d13c9aac) at VOP_LOCK_APV+0x87 Jun 19 19:45:34 Nightly kernel: vn_lock(c1cc4110,1001,c1cd4600) at vn_lock+0xa8 Jun 19 19:45:34 Nightly kernel: filt_vfsread(c17f094c,0) at filt_vfsread+0x3a Jun 19 19:45:34 Nightly kernel: kqueue_scan(c201c200,1,d13c9cc8,0,d13c9bf4) at kqueue_scan+0x463 Jun 19 19:45:34 Nightly kernel: kern_kevent(c1cd4600,4,0,1,d13c9cc8) at kern_kevent+0x151 Jun 19 19:45:34 Nightly kernel: kevent(c1cd4600,d13c9d04,6,93,246) at kevent+0x55 Jun 19 19:45:34 Nightly kernel: syscall(3b,3b,3b,bfbfe7b0,1) at syscall+0x22f Jun 19 19:45:34 Nightly kernel: Xint0x80_syscall() at Xint0x80_syscall+0x1f Jun 19 19:45:34 Nightly kernel: --- syscall (363, FreeBSD ELF32, kevent), eip = 0x280b9503, esp = 0xbfbfe77c, ebp = 0xbfbfe828 --- ~ ~
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