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Date:      Sat, 28 Aug 1999 22:37:29 -0700 (PDT)
From:      Matthew Dillon <dillon@apollo.backplane.com>
To:        freebsd-current@FreeBSD.ORG
Subject:   multipatch #6 available
Message-ID:  <199908290537.WAA02319@apollo.backplane.com>

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    I've resynced the source tree and updated my big-fat patch again.

	http://www.backplane.com/FreeBSD4/

    This patch is the same as the last one, but:

	* should patch clean to the tree as of tonight

	* fixes an additional bug in swapblock management.  Certain
	  management functions were being run at splbio() that
	  had to be run at splvm().

	* Adds a new feature to VN - swap space pre-reservation,
	  in addition to the two features already added (zeroing
	  and file creation/truncation).

	  The swap space prereservation option may be used when
	  configuring VN with swap backing store.  Swap will be
	  preallocated for all blocks in the device and no 
	  on-the-fly reallocation will occur.  This avoids swap
	  fragmentation and even allows you to 'recover' swap-backed
	  VN-based filesystems across reboots provided that you create
	  them with the same sizes and order as before and swap has not
	  been allocated for anything else prior to the vnconfigs.

    A full description is available on my site.

    This patch has been extensively tested, especially the VN device when
    used in swap-backed mode.

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>


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