On 28.10.19 13:48, Jeff Mahoney wrote:

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I wasn't looking to point fingers.  I'm not aware of*any*  swap requirement for kdump, so I was looking for the historical reason why it was added so we could address that directly (especially if it's changed).

That's interesting. It is common knowledge^W^Wgeneral folklore here (at least at the YaST team) that kdump needs as much swap space as

Following up on the swap space thread on [research], I just received an interesting piece of information from Jeff Mahoney (see below). Summary: kdump does not need swap with the same size as RAM. It doesn't need swap at all. (!) Jeff just put that into a Jira request: https://jira.suse.com/browse/PM-1444 -------- Forwarded Message -------- Subject: Re: [Research] Recommendation for swap space Date: Mon, 28 Oct 2019 09:55:22 -0400 From: Jeff Mahoney <jeffm@suse.com> To: Stefan Hundhammer <shundhammer@suse.de> On 10/28/19 9:02 AM, Stefan Hundhammer wrote: there is RAM to be able to write a complete kernel dump. So this is not really true? No. This was the case using the old LKCD system that last shipped with SLES9. It was modeled after historical UNIX systems that had firmware writing to swap partitions for dump recovery. The kdump system we've shipped since SLE10 doesn't read or write to swap.

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Unfortunately, I wouldn't know where to look to find the source feature request for that in our products.

Welcome to the club. ;-(   When we rewrote the YaST storage stack, it was pretty much impossible to figure out the old requirements, so we reverse engineered them by identifying existing features and a lot of common sense^W^W Kentucky windage. And that was one area where that was reasonably easy to do.

Ok, that's an easy enough explanation. I'll open a JIRA ticket to remove that requirement. -Jeff -- Jeff Mahoney Director, SUSE Labs Data & Performance ------------------------------------------------------------------- Kind regards -- Stefan Hundhammer <shundhammer@suse.de> YaST Developer SUSE Software Solutions Germany GmbH Geschäftsführer: Felix Imendörffer HRB 36809 (AG Nürnberg) Maxfeldstr. 5, 90409 Nürnberg, Germany -- To unsubscribe, e-mail: yast-devel+unsubscribe@opensuse.org To contact the owner, e-mail: yast-devel+owner@opensuse.org