From: "Theodore Ts'o" <tytso@mit.edu>
To: Hugh Dickins <hugh@veritas.com>
Cc: OBATA Noboru <noboru.obata.ar@hitachi.com>,
lkml@oxley.org, pavel@ucw.cz, hyoshiok@miraclelinux.com,
linux-kernel@vger.kernel.org
Subject: Re: Linux Kernel Dump Summit 2005
Date: Wed, 19 Oct 2005 15:00:13 -0400 [thread overview]
Message-ID: <20051019190013.GD10969@thunk.org> (raw)
In-Reply-To: <Pine.LNX.4.61.0510181501380.8233@goblin.wat.veritas.com>
On Tue, Oct 18, 2005 at 03:10:24PM +0100, Hugh Dickins wrote:
> On Tue, 18 Oct 2005, OBATA Noboru wrote:
> >
> > I have a bitter experience in analyzing a partial dump. The
> > dump completely lacks the PTE pages of user processes and I had
> > to give up analysis then. A partial dump has a risk of failure
> > in analysis.
>
> Page tables of user processes are very often essential in a dump.
> Data pages of user processes are almost always just a waste of
> space and time in a dump. Please don't judge against partial
> dumps on the basis of one that was badly selected.
We've had hard-to-reproduce problems out in the field where being able
to find the data pages of the user process was critical to figuring
out what the heck was going on. So I wouldn't be quite so eager to
dismiss the need for user pages. There are times when they come in
quite handy....
- Ted
next prev parent reply other threads:[~2005-10-19 19:00 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-21 11:55 Linux Kernel Dump Summit 2005 Hiro Yoshioka
2005-10-06 12:17 ` OBATA Noboru
2005-10-06 14:39 ` Hiro Yoshioka
2005-10-10 8:45 ` Pavel Machek
2005-10-12 8:28 ` OBATA Noboru
2005-10-12 9:02 ` Felix Oxley
2005-10-12 9:09 ` Pavel Machek
2005-10-12 9:56 ` Felix Oxley
2005-10-12 10:07 ` Pavel Machek
2005-10-12 18:03 ` Andy Isaacson
2005-10-12 22:34 ` Felix Oxley
2005-10-12 11:05 ` jerome lacoste
2005-10-12 21:10 ` Felix Oxley
2005-10-18 13:47 ` OBATA Noboru
2005-10-18 14:10 ` Hugh Dickins
2005-10-19 19:00 ` Theodore Ts'o [this message]
2005-10-27 7:48 ` OBATA Noboru
2005-10-11 0:49 ` Andrew Morton
2005-10-11 4:41 ` Hiro Yoshioka
2005-10-12 8:30 ` OBATA Noboru
2005-10-13 5:49 ` Maneesh Soni
2005-10-27 7:45 ` OBATA Noboru
2005-10-13 14:28 ` Troy Heber
2005-10-17 11:19 ` Takao Indoh
2005-10-18 13:48 ` OBATA Noboru
2005-10-19 3:17 ` Takao Indoh
2005-10-27 7:45 ` OBATA Noboru
2005-10-18 14:54 ` Carsten Otte
-- strict thread matches above, loose matches on Subject: below --
2005-10-14 9:19 hideki.takahashi
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