linux-kernel - Re: ia64 hang/mca running gdb 'make check'

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Message-Id: <20100729174447.55d50801.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 29 Jul 2010 17:44:47 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Luming Yu <luming.yu@...il.com>
Cc:	dann frazier <dannf@...ian.org>, Hugh Dickins <hughd@...gle.com>,
	linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rik van Riel <riel@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Nick Piggin <npiggin@...e.de>, Mel Gorman <mel@....ul.ie>,
	Minchan Kim <minchan.kim@...il.com>,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: ia64 hang/mca running gdb 'make check'

On Thu, 29 Jul 2010 16:40:50 +0800
Luming Yu <luming.yu@...il.com> wrote:

> On Thu, Jul 29, 2010 at 3:58 PM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@...fujitsu.com> wrote:
> > On Thu, 29 Jul 2010 15:38:06 +0800
> > Luming Yu <luming.yu@...il.com> wrote:
> >
> >> On Tue, Jul 27, 2010 at 5:03 PM, KAMEZAWA Hiroyuki
> >
> >> # gdb ./foo
> >> GNU gdb (GDB) Red Hat Enterprise Linux (7.0.1-23.el5)
> >> Copyright (C) 2009 Free Software Foundation, Inc.
> >> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> >> This is free software: you are free to change and redistribute it.
> >> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> >> and "show warranty" for details.
> >> This GDB was configured as "ia64-redhat-linux-gnu".
> >> For bug reporting instructions, please see:
> >> <http://www.gnu.org/software/gdb/bugs/>...
> >> Reading symbols from /root/foo...done.
> >> (gdb) break leaf
> >> Breakpoint 1 at 0x40000000000005a1: file foo.c, line 2.
> >> (gdb) run
> >> Starting program: /root/foo
> >>
> >> Breakpoint 1, leaf () at foo.c:2
> >> 2       }
> >> (gdb) gcore /tmp/save
> >> Segmentation fault
> >> # cat /proc/version
> >> Linux version 2.6.35-rc3+ ...
> >>
> >>
> >
> > Hmm. What is EXEC_PAGESIZE installed in /usr/include/asm-generic/param.h ?
> 
> I use stock gdb shipped with RHEL 5.5.
> 
Hmm. RHEL5.5's EXEC_PAGESIZE is 64k, right ?
(And your kernel is 16k.)

> > And what happnes when modify it to 16k if it's 64k ?
> 
> Want me to repbuild a gdb with this modification?
> 
Ahhh, yes. It will be required...but plz when you have free time.
I don't think the difference can cause MCA or hang...

Thanks,
-Kame

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