Hello Lei,
From: Lei Wen <leiwen(a)marvell.com>
Subject: RE: [Crash-utility] [ANNOUNCE] crash gcore command, version 1.1 available
Date: Fri, 23 Mar 2012 07:15:31 -0700
Hi HATAYAMA,
> -----Original Message-----
> From: HATAYAMA Daisuke [mailto:d.hatayama@jp.fujitsu.com]
> Sent: Friday, March 23, 2012 8:38 AM
> To: crash-utility(a)redhat.com; Lei Wen
> Subject: Re: [Crash-utility] [ANNOUNCE] crash gcore command, version 1.1
> available
>
> From: Dave Anderson <anderson(a)redhat.com>
> Subject: Re: [Crash-utility] [ANNOUNCE] crash gcore command, version 1.1
> available
> Date: Thu, 22 Mar 2012 11:23:36 -0400 (EDT)
>
> > Can you please format the crash-gcore-command-1.1.tar.gz file in
> > the same manner as crash-gcore-command-1.0.tar.gz? Here is the
> > current version:
>
> Thanks for pointing out that, Dave. I attached new one.
>
> And for Lei, I made bigger fault that I missed arm source
> file... Could you confirm that the new one can work on arm
> environment?
Yes, this version works for me.
I see.
However, I think there is a point may need to be enhanced:
diff --git a/extensions/libgcore/gcore_coredump.c b/extensions/libgcore/gcore_coredump.c
index e2d9941..fec8ffc 100644
--- a/extensions/libgcore/gcore_coredump.c
+++ b/extensions/libgcore/gcore_coredump.c
@@ -200,7 +200,8 @@ void gcore_coredump(void)
"readmem vma list",
gcore_verbose_error_handle());
} else {
- pagefaultf("page fault at %lx\n", addr);
+ if (paddr == PADDR_NOT_AVAILABLE)
+ pagefaultf("page fault at %lx\n",
addr);
BZERO(buffer, PAGE_SIZE);
}
Without this, I would see many " page fault at XXX" for the lazy mapping as we
talked in the previous thread:
http://www.redhat.com/archives/crash-utility/2012-February/msg00112.html
As Dave explains, gcore needs to inform users of the fact that some
part of memory is lost. However, it is cerntain that currnet
implementation displays ``page fault'' even for the pages that should
be displayed differently. I want to change the message for such pages
to proper one.
Also, to be honest, I didn't know PADDR_NOT_AVAILABLE. Looking at
source code, it appears to be used in Xen path. I have yet to know
whether or not to use the macro. I'll consider it more.
BTW, if you feel the page-fault message noisy, please use -v 0. Then,
gcore doesn't say almost anything.
Thanks.
HATAYAMA, Daisuke