[mini-HEADSUP] amd64 minidump v2 MFC

Andriy Gapon avg at freebsd.org
Fri Nov 26 16:33:00 UTC 2010

I have just MFC-ed r215133 (see r215872, r215874) which changes minidump format
and should result in a noticeable reduction of minidump vmcore size, especially
for smaller systems.

This change is for amd64 architecture only.

libkvm should still support the previous version 1 minidump format.
So, vmcore files produced by minidump in older kernels should be accessible by
newer userland.  But vmcore files produced by minidump in newer kernels will not
be accessible by older userland.  Which means that it's better to upgrade userland
when upgrading kernel.

Not sure if this information is worth an entry in UPDATING, FreeBSD isn't supposed
to crash after all :-)

Andriy Gapon

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