Date: Sat, 02 Jul 2005 17:31:53 +1200 From: Andrew Turner <andrew@fubar.geek.nz> To: Michel Talon <talon@lpthe.jussieu.fr> Cc: freebsd-current@freebsd.org Subject: Re: June Snapshot of 6.0 woes under qemu Message-ID: <42C626C9.60206@fubar.geek.nz> In-Reply-To: <20050701094904.GA98642@lpthe.jussieu.fr> References: <20050701094904.GA98642@lpthe.jussieu.fr>
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Michel Talon wrote: >Hello, > >i have downloaded June snapshot of 6.0 for i386 (and checked md5), and >tried to run it on qemu (under FreeBSD-5.4, qemu with or without acceleration, >and with various memory sizes). I try to enter the fixit console, and type >commands, the console freezes. This is the first time i see that with FreeBSD >snapshots, qemu runs fine various Linux distros and Solaris. I suspect >there is some strange bug. > > > > I had the same problem yesterday with a custom build install CD. The problem is a lock order reversal: Fixit# ls lock order reversal 1st 0xc16d26e8 ATA state lock (ATA state lock) @ /usr/src/sys/dev/ata/ata-all.c:297 2nd 0xc14611c4 user map (user map) @ /usr/src/sys/vm/vm_map.c:2997 KDB: stack backtrace: kdb_backtrace(0,ffffffff,c0927968,c0928520,c08b464c) at kdb_backtrace+0x29 witness_checkorder(c14611c4,9,c086a271,bb5) at witness_checkorder+0x564 _sx_xlock(c14611c4,c086a271,bb5) at _sx_xlock+0x50 _vm_map_lock_read(c1461180,c086a271,bb5,200dbbb,c) at _vm_map_lock_read+0x37 vm_map_lookup(c7f65b7c,c72d4000,2,c7f65b80,c7f65b70) at vm_map_lookup+0x28 vm_fault(c1461000,c72d4000,2,0,c16e0000) at vm_fault+0x66 trap_pfault(c7f65c44,0,c72d4800) at trap_pfault+0x137 trap(8,28,28,c72d4800,c16d2600) at trap+0x33d calltrap() at calltrap+0x5 --- trap 0xc, eip = 0xc04d25cc, esp = 0xc7f65c84, ebp = 0xc7f65ca4 --- ata_pio_read(c1825190,800,129,c17c9d00,c17e8400) at ata_pio_read+0x78 ata_end_transaction(c1825190) at ata_end_transaction+0x8b8 ata_interrupt(c16d2600) at ata_interrupt+0xdf ithread_loop(c16dd800,c7f65d38,c16dd800,c061b418,0) at ithread_loop+0x11c fork_exit(c061b418,c16dd800,c7f65d38) at fork_exit+0xa0 fork_trampoline() at fork_trampoline+0x8 --- trap 0x1, eip = 0, esp = 0xc7f65d6c, ebp = 0 --- panic: vm_fault: fault on nofault entry, addr: c72d4000 cpuid = 0 KDB: enter: panic [thread pid 26 tid 100010 ] Stopped at kdb_enter+0x2b: nop db> This is known. See: http://sources.zabbadoz.net/freebsd/lor.html#101 Andrew -- 437742420
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