DragonFly BSD
DragonFly kernel List (threaded) for 2006-03
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Re: savecore vs. hw.physmem

From: Csaba Henk <csaba.henk@xxxxxxx>
Date: 23 Mar 2006 19:01:22 GMT

On 2006-03-23, Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx> wrote:
>     The dump is calculated from the end of swap space backwards, based on
>     physical memory.  So the answer is: not easily.

Well then, my reminiscences of successfully saving the dump of a low
hw.physmem'd session come from FreeBSD. Looking after it, they rewrote
the dumping code in the spring of 2002; see the relevant commits listed


(from rev. 71452 to rev. 71458).

>     But you might be able
>     to work around the problem by adding an option to savecore to allow
>     the amount of physical memory (as of when the crash occured) to be
>     specified.

Thanks, that will do the job.


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