Date: Sat, 20 Aug 2005 12:56:34 +0000 (UTC) From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: Filippo Natali <filippo.natali@gmail.com> Cc: FreeBSD current mailing list <current@freebsd.org> Subject: Re: LOR on AMD64 Message-ID: <Pine.BSF.4.53.0508201253380.70501@e0-0.zab2.int.zabbadoz.net> In-Reply-To: <200508162342.27570.filippo.natali@gmail.com> References: <200508162342.27570.filippo.natali@gmail.com>
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On Tue, 16 Aug 2005, Filippo Natali wrote: > I have the same problem described here: > > http://lists.freebsd.org/pipermail/freebsd-current/2005-June/051157.html > > but on my machine I obtain the attached LOR instead of a panic, and the CPU > runs at 100%. > > lock order reversal > 1st 0xffffff003d684600 pcm0 (sound cdev) @ /usr/src/sys/modules/sound/sound/../../../dev/sound/pcm/dsp.c:214 > 2nd 0xffffffff8081e860 Giant (Giant) @ /usr/src/sys/kern/kern_synch.c:236 > KDB: stack backtrace: > witness_checkorder() at witness_checkorder+0x4ba > _mtx_lock_flags() at _mtx_lock_flags+0x4a > msleep() at msleep+0x28a > kmem_malloc() at kmem_malloc+0x22f > uma_large_malloc() at uma_large_malloc+0x45 > malloc() at malloc+0x12b > sndbuf_remalloc() at sndbuf_remalloc+0x97 > chn_setblocksize() at chn_setblocksize+0x1d0 > chn_tryspeed() at chn_tryspeed+0x13b > chn_tryformat() at chn_tryformat+0xe7 > chn_setformat() at chn_setformat+0x20 > chn_reset() at chn_reset+0xdb > dsp_open() at dsp_open+0x20a > devfs_open() at devfs_open+0x256 > VOP_OPEN_APV() at VOP_OPEN_APV+0x74 > vn_open_cred() at vn_open_cred+0x38c > kern_open() at kern_open+0xfd > open() at open+0x25 > syscall() at syscall+0x4b2 > Xfast_syscall() at Xfast_syscall+0xa8 > --- syscall (5, FreeBSD ELF64, open), rip = 0x801ad87fc, rsp = 0x7fffffffa748, rbp = 0x1 --- > > %uname -a > FreeBSD ulby.hq.netwing.it 6.0-BETA2 FreeBSD 6.0-BETA2 #0: Fri Aug 12 10:52:32 > CEST 2005 root@ulby.hq.netwing.it:/usr/obj/usr/src/sys/GENERIC amd64 I added the LOR as #129 http://sources.zabbadoz.net/freebsd/lor.html#129 -- Bjoern A. Zeeb bzeeb at Zabbadoz dot NeT
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