CVS commit: src/sys/arch/x86/x86

["Cherry G. Mathew" <cherry%netbsd.org@localhost>]

Module Name:    src
Committed By:   cherry
Date:           Tue Jan 10 09:48:23 UTC 2017

Modified Files:
        src/sys/arch/x86/x86: x86_machdep.c

Log Message:
While reserving memory at boot time via uvm_physseg_unplug(9),
in the case of a disappearing segment (due to a segment sized msgbuf)
make sure segment offsets are read off before the segment disappears.

This should fix some of the recent boot time hard resets reported on
i386 recently.

Thanks to kre@ for pointing this out to me.

CVS: ----------------------------------------------------------------------
CVS: CVSROOT  cvs.NetBSD.org:/cvsroot
CVS: please use "PR category/123" to have the commitmsg appended to PR 123
CVS:
CVS: Please evaluate your changes and consider the following.
CVS: Abort checkin if you answer no.
CVS: => For all changes:
CVS: Do the changed files compile?
CVS: Has the change been tested?
CVS: => If you are not completely familiar with the changed components:
CVS: Has the change been posted for review?
CVS: Have you allowed enough time for feedback?
CVS: => If the change is major:
CVS: => If the change adds files to, or removes files from $DESTDIR:
CVS: => If you are changing a library or kernel interface:
CVS: Have you successfully run "./build.sh release"?


To generate a diff of this commit:
cvs rdiff -u -r1.80 -r1.81 src/sys/arch/x86/x86/x86_machdep.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.