From owner-freebsd-hackers@FreeBSD.ORG  Fri Jun 18 20:51:17 2004
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Date: Fri, 18 Jun 2004 16:51:15 -0400
From: Brian Fundakowski Feldman <green@FreeBSD.org>
To: hackers@FreeBSD.org
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cc: alc@FreeBSD.org
cc: dillon@backplane.com
cc: peter@FreeBSD.org
Subject: Re: contigmalloc(9) rewrite
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On Tue, Jun 15, 2004 at 03:57:09PM -0400, Brian Fundakowski Feldman wrote:
> The patch, which applies to 5-CURRENT, can be found here:
> 	<http://green.homeunix.org/~green/contigmalloc2.patch>
> The default is to use the old contigmalloc().  You can set the
> sysctl or loader tunable "vm.old_contigmalloc" to 0 to enable it.
> 
> For anyone that normally runs into failed allocations hot-plugging
> hardware, please try this and see if it helps out.

By the way, I have updated it further to split apart contigmalloc()
into a separate vm_page_alloc_contig() and mapping function as per
feedback from Alan Cox and Hiten Pandya.  The operation is still the
same except for now being able to see memory allocated with it
in your vmstat(8) -m output. The patch is still at the same location,
and requires sysctl vm.old_contigmalloc=0 to enable.

Thanks!

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green@FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\