[marius@freebsd.org: svn commit: r235992 - stable/9/sys/sparc64/conf]

Marius Strobl marius at alchemy.franken.de
Fri May 25 14:46:21 UTC 2012

FYI, if you are using stable/9 past r230892 or head past r230662,
i.e. have sys/sparc64/sparc64/support.S CVS rev.,
you should turn on PREEMPTION as below by now.


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From: Marius Strobl <marius at freebsd.org>
Date: Fri, 25 May 2012 14:40:56 +0000 (UTC)
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Subject: svn commit: r235992 - stable/9/sys/sparc64/conf
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Author: marius
Date: Fri May 25 14:40:56 2012
New Revision: 235992
URL: http://svn.freebsd.org/changeset/base/235992

  MFC: r234348
  Turn on PREEMPTION by default. After fixing several bugs over time, the
  last show-stopper keeping PREEMPTION from being usable on sparc64 should
  have been dealt with in r230662 (MFC'ed to stable/9 in r230662).
  At least on 2-way systems, PREEMPTION causes a little bit of a degradation
  in worldstone performance. However, FreeBSD seems to have started building
  up regressions in !PREEMPTION cases so sparc64 better should not be an
  oddball in this regard.

Directory Properties:
  stable/9/sys/   (props changed)
  stable/9/sys/amd64/include/xen/   (props changed)
  stable/9/sys/boot/   (props changed)
  stable/9/sys/boot/i386/efi/   (props changed)
  stable/9/sys/boot/ia64/efi/   (props changed)
  stable/9/sys/boot/ia64/ski/   (props changed)
  stable/9/sys/boot/powerpc/boot1.chrp/   (props changed)
  stable/9/sys/boot/powerpc/ofw/   (props changed)
  stable/9/sys/cddl/contrib/opensolaris/   (props changed)
  stable/9/sys/conf/   (props changed)
  stable/9/sys/contrib/dev/acpica/   (props changed)
  stable/9/sys/contrib/octeon-sdk/   (props changed)
  stable/9/sys/contrib/pf/   (props changed)
  stable/9/sys/contrib/x86emu/   (props changed)
  stable/9/sys/dev/   (props changed)
  stable/9/sys/dev/e1000/   (props changed)
  stable/9/sys/dev/ixgbe/   (props changed)
  stable/9/sys/fs/   (props changed)
  stable/9/sys/fs/ntfs/   (props changed)
  stable/9/sys/modules/   (props changed)

Modified: stable/9/sys/sparc64/conf/GENERIC
--- stable/9/sys/sparc64/conf/GENERIC	Fri May 25 14:11:02 2012	(r235991)
+++ stable/9/sys/sparc64/conf/GENERIC	Fri May 25 14:40:56 2012	(r235992)
@@ -27,7 +27,7 @@ makeoptions	DEBUG=-g		# Build kernel wit
 #	At this time all platforms are supported, as-is.
 options 	SCHED_ULE		# ULE scheduler
-#options 	PREEMPTION		# Enable kernel thread preemption
+options 	PREEMPTION		# Enable kernel thread preemption
 options 	INET			# InterNETworking
 options 	INET6			# IPv6 communications protocols
 options 	SCTP			# Stream Control Transmission Protocol
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