Date: Thu, 29 Jul 2010 17:44:47 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Luming Yu <luming.yu@gmail.com>
Cc: dann frazier <dannf@debian.org>, Hugh Dickins <hughd@google.com>,
        linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org,
        Rik van Riel <riel@redhat.com>,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
        Nick Piggin <npiggin@suse.de>, Mel Gorman <mel@csn.ul.ie>,
        Minchan Kim <minchan.kim@gmail.com>,
        Ralf Baechle <ralf@linux-mips.org>
Subject: Re: ia64 hang/mca running gdb 'make check'
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On Thu, 29 Jul 2010 16:40:50 +0800
Luming Yu <luming.yu@gmail.com> wrote:

> On Thu, Jul 29, 2010 at 3:58 PM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> > On Thu, 29 Jul 2010 15:38:06 +0800
> > Luming Yu <luming.yu@gmail.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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