From: Han Pingtian <hanpt@linux.vnet.ibm.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: Erwan Velu <erwan@enovance.com>, fio@vger.kernel.org
Subject: Re: segmentation fault on power system
Date: Fri, 9 Aug 2013 16:39:05 +0800 [thread overview]
Message-ID: <20130809083905.GA9877@localhost.localdomain> (raw)
In-Reply-To: <51F13781.8000502@kernel.dk>
On Thu, Jul 25, 2013 at 08:34:41AM -0600, Jens Axboe wrote:
> On 07/24/2013 12:21 AM, Han Pingtian wrote:
> > I think I have found what's wrong. After 'make distclean' then 'make',
> > the problem of segfault has gone. There were some object files
> > compiled on another machine. The recompilation fixed it. But looks like
> > the ATBU call dosen't work on power7 system.
>
> So the recompilation fixed the segfault, but not the illegal instruction
> due to ATBU?
Yes. If we set unlimit core dump, fio will generate a core with
backtrace like this one:
#0 mfspr (envp=<value optimized out>) at arch/arch-ppc.h:55
55 asm volatile("mfspr %0,%1": "=r" (val) : "K" (reg));
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.107.el6.ppc64 libaio-0.3.107-10.el6.ppc64
(gdb) bt
#0 mfspr (envp=<value optimized out>) at arch/arch-ppc.h:55
#1 get_cpu_clock (envp=<value optimized out>) at arch/arch-ppc.h:71
#2 atb_child (envp=<value optimized out>) at arch/arch-ppc.h:88
#3 atb_clocktest (envp=<value optimized out>) at arch/arch-ppc.h:98
#4 arch_init (envp=<value optimized out>) at arch/arch-ppc.h:116
#5 initialize_fio (envp=<value optimized out>) at libfio.c:248
#6 0x0000000010067294 in main (argc=<value optimized out>, argv=<value optimized out>,
envp=<value optimized out>) at fio.c:33
Apologize for late to reply.
next prev parent reply other threads:[~2013-08-09 8:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-23 10:13 segmentation fault on power system Han Pingtian
2013-07-23 10:23 ` Erwan Velu
2013-07-23 15:15 ` Jens Axboe
2013-07-24 2:10 ` Han Pingtian
2013-07-24 6:21 ` Han Pingtian
2013-07-25 14:34 ` Jens Axboe
2013-08-09 8:39 ` Han Pingtian [this message]
2013-08-09 15:02 ` Jens Axboe
2013-07-24 1:40 ` Han Pingtian
-- strict thread matches above, loose matches on Subject: below --
2013-10-10 6:30 Saritha Vinod
2013-10-11 16:28 ` Jens Axboe
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