Date: Sat, 06 Aug 2005 11:06:01 +0800 From: David Xu <davidxu@freebsd.org> To: freebsd-current@freebsd.org Subject: Lock order reversal in RELENG_6 Message-ID: <42F42919.2030207@freebsd.org> In-Reply-To: <20050803111624.GA271@cirb503493.alcatel.com.au> References: <20050802152009.GA29643@mercury.m202.net> <008c01c59777$42db5520$0b02a8c0@justin> <790a9fff050802084439209f7e@mail.gmail.com> <20050802160045.GA61854@freebie.xs4all.nl> <20050803024341.GA92499@over-yonder.net> <20050803082939.GE45385@obiwan.tataz.chchile.org> <20050803111624.GA271@cirb503493.alcatel.com.au>
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lock order reversal 1st 0xc0980be0 UMA lock (UMA lock) @ vm/uma_core.c:1494 2nd 0xc1060144 system map (system map) @ vm/vm_map.c:2317 KDB: stack backtrace: kdb_backtrace(0,ffffffff,c0935cf8,c0935e38,c08bbfa4) at kdb_backtrace+0x29 witness_checkorder(c1060144,9,c0872746,90d) at witness_checkorder+0x564 _mtx_lock_flags(c1060144,0,c087273d,90d) at _mtx_lock_flags+0x5b _vm_map_lock(c10600c0,c087273d,90d) at _vm_map_lock+0x26 vm_map_remove(c10600c0,c2595000,c2596000,de3cac08,c0780751) at vm_map_remove+0x1f kmem_free(c10600c0,c2595000,1000,de3cac38,c07800fe) at kmem_free+0x25 page_free(c2595000,1000,2) at page_free+0x29 zone_drain(c103dd20) at zone_drain+0x26a zone_foreach(c077fe94,de3cacec,c0791f7f,c1ecc960,de3cac74) at zone_foreach+0x37 uma_reclaim(c1ecc960,de3cac74,0,c092c320,de3cac80) at uma_reclaim+0x12 vm_pageout_scan(0,c0981040,0,c0873c16,5c3) at vm_pageout_scan+0x103 vm_pageout(0,de3cad38,0,c0792d38,0) at vm_pageout+0x2c3 fork_exit(c0792d38,0,de3cad38) at fork_exit+0xa0 fork_trampoline() at fork_trampoline+0x8 --- trap 0x1, eip = 0, esp = 0xde3cad6c, ebp = 0 --- David Xu
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