linux-kernel - Re: kdump/kexec vmcore size doubles each time

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Message-ID: <20120724140645.GA17687@router-fw-old.local.net-space.pl>
Date:	Tue, 24 Jul 2012 16:06:45 +0200
From:	Daniel Kiper <dkiper@...-space.pl>
To:	joe shmoe <joeshmoeypeter@...oo.com>
Cc:	Daniel Kiper <dkiper@...-space.pl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	daniel.kiper@...cle.com
Subject: Re: kdump/kexec vmcore size doubles each time

On Mon, Jul 23, 2012 at 04:48:19PM -0700, joe shmoe wrote:
> Hi,
> Thank you for the reply.

You are welcome.

> I ended up opting for writing to filesystem rather than
> raw_device and this seems to have helped me sidestep the
> problem for now.

Good move.

> Unfortunately, I can't quite make a jump to later sources.
>
> I do have another question, I see KDUMP_KEEP_OLD_DUMPS mentioned
> to automatically clean up prior dumps (for ex: http://dedoimedo.com/computers/kdump.html
> and other SUSE docs).
> However, I cannot find any logic in sources to do this (and sure
> enough I don't see older cores in my /var/crash/ path clean up
> as new cores are dumped).
>
> Could someone please comment if:
> (i) KDUMP_KEEP_OLD_DUMPS is unsupported or not. If it IS supported,
> could someone please help with the relevant source code so I could
> debug why it isn't working? Yes, I did download kexec-tools git but
> cannot find anything relevant.
>
> (ii) If there is NO explicit source code to achieve this -- then
> do folks achieve such a cleanup through KDUMP_PRE and KDUMP_POST scripts?
> If yes, is there a standard-ish script out there to achieve this?

Sorry but I could not help because I do not use SUSE.
But maybe guys from SUSE could point out something.

Daniel
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