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Date: Thu, 22 Nov 2001 06:00:02 -0800 (PST)
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From: Ian Dowse <iedowse@maths.tcd.ie>
Subject: Re: kern/32184: Kernel crashes in ufs code 
Reply-To: Ian Dowse <iedowse@maths.tcd.ie>
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The following reply was made to PR kern/32184; it has been noted by GNATS.

From: Ian Dowse <iedowse@maths.tcd.ie>
To: Roman Shterenzon <roman@harmonic.co.il>
Cc: FreeBSD-gnats-submit@freebsd.org, freebsd-stable@freebsd.org
Subject: Re: kern/32184: Kernel crashes in ufs code 
Date: Thu, 22 Nov 2001 13:58:49 +0000

 In message <200111221112.fAMBCs300652@alchemy.oven.org>, Roman Shterenzon write
 s:
 >
 >>Synopsis:       Kernel crashes in ufs code
 
 The first trap occurs at frame #18 in xl_newbuf(). This is the
 frame of interest. The UFS trap is probably caused by the kernel
 attempting to sync the disks before rebooting at an inappropriate
 time.
 
 The line in question is
 
 	MCLGET(m_new, M_DONTWAIT);
 
 so some sort of mbuf cluster free-list corruption has probably
 occurred. Tracking down such problems is not particularly easy...
 
 Ian
 
 >#17 0xc0274e2f in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, 
 >      tf_edi = -1062710272, tf_esi = 6685184, tf_ebp = -1070806476, 
 >      tf_isp = -1070806508, tf_ebx = -1062710272, tf_edx = -1063047168, 
 >      tf_ecx = -264341449, tf_eax = 389973, tf_trapno = 12, tf_err = 0, 
 >      tf_eip = -1071728840, tf_cs = 8, tf_eflags = 66050, 
 >      tf_esp = -1062819840, tf_ss = -1059785052}) at ../../i386/i386/trap.c:44
 >8
 >#18 0xc01eb738 in xl_newbuf (sc=0xc0d4f000, c=0xc0d4f6a4)
 >    at ../../pci/if_xl.c:1724
 >#19 0xc01eb90a in xl_rxeof (sc=0xc0d4f000) at ../../pci/if_xl.c:1825
 >#20 0xc01ec048 in xl_intr (arg=0xc0d4f000) at ../../pci/if_xl.c:2060
 >#21 0xc027d917 in intr_mux (arg=0xc0a34800)
 >    at ../../i386/isa/intr_machdep.c:582

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