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Date: Tue, 10 Jul 2007 09:49:30 -0700 From: Randy Dunlap <rdunlap@...otime.net> To: Pavel Emelianov <xemul@...ru> Cc: Ashok Raj <ashok.raj@...el.com>, Shaohua Li <shaohua.li@...el.com>, Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org> Subject: Re: OOPS at dmar_table_init (2.6.22-rc6-mm1 kernel) On Tue, 10 Jul 2007 17:57:25 +0400 Pavel Emelianov wrote: > Hi. > > While working with Andrew's kernel I faced an OOPS on x86_64 > machine. Unfortunately kernel logs are not appearing in serial > console by the time oops happens, but I have some info on the > screen: > > OOPs is at dmar_table_init() here: > ffffffff80532873 <dmar_table_init>: > ffffffff80532873: 41 55 push %r13 > ffffffff80532875: 41 54 push %r12 > ffffffff80532877: 55 push %rbp > ffffffff80532878: 53 push %rbx > ffffffff80532879: 51 push %rcx > ffffffff8053287a: 4c 8b 2d 07 21 01 00 mov 73991(%rip),%r13 # ffffffff80544988 <dmar_tbl> > ffffffff80532881: 41 0f b6 45 24 movzbl 0x24(%r13),%eax <<<<<<<<<<< OOPS, %r13 = NULL > ffffffff80532886: 84 c0 test %al,%al > ffffffff80532888: 75 11 jne ffffffff8053289b <dmar_table_init+0x28> > ffffffff8053288a: 48 c7 c7 b0 3d 45 80 mov $0xffffffff80453db0,%rdi > ffffffff80532891: e8 c2 4a cf ff callq ffffffff80227358 <printk> > ffffffff80532896: e9 f2 01 00 00 jmpq ffffffff80532a8d <dmar_table_init+0x21a> > > Looks like dmar_tbl is NULL. > BUG is 100% reproducible. Is there any other info that can be useful? You could test the patch from http://lkml.org/lkml/2007/6/29/174 (see "Get diff 1"). --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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