Date: Mon, 8 Mar 2004 12:10:40 -0800 From: Peter Wemm <peter@wemm.org> To: freebsd-current@freebsd.org Cc: current@freebsd.org Subject: Re: LOR in yesterday CURRENT: system map vs Giant Message-ID: <200403081210.40697.peter@wemm.org> In-Reply-To: <20040307184421.GA18871@tin.it> References: <20040307184421.GA18871@tin.it>
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On Sunday 07 March 2004 10:44 am, Paolo Pisati wrote: > Just after starting X, i got this on the console: > > drm0: <ATI Radeon LY Mobility M6> port 0xd800-0xd8ff mem > 0xef000000-0xef00ffff,0 xf0000000-0xf7ffffff irq 11 at device 0.0 on > pci1 > info: [drm] AGP at 0xf8000000 64MB > info: [drm] Initialized radeon 1.10.0 20020828 on minor 0 > drm0: [MPSAFE] > lock order reversal > 1st 0xc0c3b060 system map (system map) @ > /usr/src/sys/vm/vm_map.c:2210 2nd 0xc066db40 Giant (Giant) @ > /usr/src/sys/vm/vm_fault.c:1084 Stack backtrace: > backtrace(c0621dad,c066db40,c061dc30,c061dc30,c062cd15) at > backtrace+0x17 witness_checkorder(c066db40,9,c062cd15,43c,c062eb5e) > at witness_checkorder+0x6f8 > > _mtx_lock_flags(c066db40,0,c062cd15,43c,c0c39780) at > _mtx_lock_flags+0x9d > vm_fault_unwire(c0c3b000,d3143000,d3144000,c0c39690,d244cc24) at > vm_fault_unwire +0x36 > vm_map_entry_unwire(c0c3b000,c0c39780,d3144000,d244cc24,c059cfe6) at > vm_map_entr y_unwire+0x25 > vm_map_delete(c0c3b000,d3143000,d3144000,c2805580,c2ccc85c) at > vm_map_delete+0x1 65 > vm_map_remove(c0c3b000,d3143000,d3144000,d244cc80,c05e20b0) at > vm_map_remove+0x5 5 > kmem_free(c0c3b000,d3143000,1000,16a,1) at kmem_free+0x32 > user_ldt_free(c287d7e0,c2ccc74c,d244ccd4,c04b5ece,c287d7e0) at > user_ldt_free+0xf 0 > cpu_exit(c287d7e0,0,c061be87,1f8,1) at cpu_exit+0x36 > exit1(c287d7e0,0,d244cd40,c05e3660,c287d7e0) at exit1+0x116e > sys_exit(c287d7e0,d244cd14,4,7,1) at sys_exit+0x1d > syscall(2f,2f,2f,bfbfed1c,bfbfed24) at syscall+0x2a0 > Xint0x80_syscall() at Xint0x80_syscall+0x1d > --- syscall (1), eip = 0x287ca89b, esp = 0xbfbfec8c, ebp = 0xbfbfecf4 > --- > > I wish it helps... This particular one was my fault, I believe it's been fixed. However, I also believe this particular LOR happens via other code paths that were not my fault. -- Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com "All of this is for nothing if we don't go to the stars" - JMS/B5
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