From owner-freebsd-current  Wed Mar 22  9:13: 5 2000
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Date: Wed, 22 Mar 2000 09:13:02 -0800 (PST)
From: Matthew Dillon <dillon@apollo.backplane.com>
Message-Id: <200003221713.JAA91710@apollo.backplane.com>
To: current@FreeBSD.ORG
Subject: Buf cache, swap spl, and NFS patches need review.
Sender: owner-freebsd-current@FreeBSD.ORG
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    Well, actually these have been partially reviewed over the last few
    months, but I'd like to commit them now so I need a final review on
    these babies.

    The three patches are available at:

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

    buffer cache cleanup:

	This is probably more for bde, dg, Julian, or Alfred.   bde has 
	already reviewed most of the patch.  This is the final version.

	This patch takes a step towards getting rid of the buffer cache's
	KVA management.  It chunks up the KVA allocations for the buffer
	cache to reduce fragmentation and also fixes geteblk()'s allocation
	size (previously geteblk() used MAXBSIZE, which can cause severe 
	fragmentation).

    swap-SPL:

	Required splvm()'s had to be added to two places in the swap subsystem
	(but I don't think the lack of these spl's is the cause of the
	recently reported crashes, though it is possible).

    NFS packet buffer:

	This patch increases the default buffer size from 2 to 4 packets
	for UDP NFS mounts and adds a sysctl that allows the buffer size
	to be adjusted prior to mounting.

	This patch apparently makes a big difference on clients on gigabit 
	networks, especially slower clients which can't pop the UDP packets 
	off the queue quickly enough.

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>


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