Date: Tue, 9 Jan 1996 10:19:34 PST From: "Marty Leisner" <leisner@sdsp.mc.xerox.com> To: Bruce Evans <bde@zeta.org.au> Cc: msmith@atrad.adelaide.edu.au, hackers@freebsd.org, phk@critter.tfs.com Subject: swapping (was Re: Add new slice to running system, comments? ) Message-ID: <9601091819.AA05928@gnu.mc.xerox.com> In-Reply-To: Your message of "Tue, 09 Jan 1996 05:31:41 PST." <199601091331.AAA22987@godzilla.zeta.org.au>
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I had a fairly good strategy for sharing swap between linux/win95/nt. (the Linux swap howto needs some more work). I make an extended partition of my swap size... then I do a dos format on this partition, and let win95 and nt swap to it... When Linux boots up, I do a mount -t msdos /dev/swap-space /mnt (/dev/swap-space is a sym-link to the device) rm -rf /mnt/. (better not have anything other than swap there) umount /mnt dd if=/dev/swap-space count=<some good number> | gzip -c >/tmp/swap-space.gz mkswap /dev/swap-space swapon /dev/swap-space Then when I shut down in a controlled way, I do: zcat /tmp/swap-space.gz | dd of=/dev/swap-space rm /tmp/swap-space.gz restoring the dos partition... With freebsd, to swap on the same partition is a problem since we can't unmount swap partitions...and it the dos autoexec.bat, you can't rationally tell if a partition needs to be formatted... We should be able to install a system with no swap space (when I installed 2.1, it insisted on swap (I didn't try a 0 sized partition). I really think it would be a good idea for freebsd to be more flexible in how swap works... -- marty leisner@sdsp.mc.xerox.com Member of the League for Programming Freedom
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