• Peter Zijlstra's avatar
    sched/numa: Rewrite the CONFIG_NUMA sched domain support · cb83b629
    Peter Zijlstra authored
    The current code groups up to 16 nodes in a level and then puts an
    ALLNODES domain spanning the entire tree on top of that. This doesn't
    reflect the numa topology and esp for the smaller not-fully-connected
    machines out there today this might make a difference.
    
    Therefore, build a proper numa topology based on node_distance().
    
    Since there's no fixed numa layers anymore, the static SD_NODE_INIT
    and SD_ALLNODES_INIT aren't usable anymore, the new code tries to
    construct something similar and scales some values either on the
    number of cpus in the domain and/or the node_distance() ratio.
    Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Anton Blanchard <anton@samba.org>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Chris Metcalf <cmetcalf@tilera.com>
    Cc: David Howells <dhowells@redhat.com>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: Fenghua Yu <fenghua.yu@intel.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
    Cc: linux-alpha@vger.kernel.org
    Cc: linux-ia64@vger.kernel.org
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-mips@linux-mips.org
    Cc: linuxppc-dev@lists.ozlabs.org
    Cc: linux-sh@vger.kernel.org
    Cc: Matt Turner <mattst88@gmail.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Paul Mundt <lethal@linux-sh.org>
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Cc: Richard Henderson <rth@twiddle.net>
    Cc: sparclinux@vger.kernel.org
    Cc: Tony Luck <tony.luck@intel.com>
    Cc: x86@kernel.org
    Cc: Dimitri Sivanich <sivanich@sgi.com>
    Cc: Greg Pearson <greg.pearson@hp.com>
    Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
    Cc: bob.picco@oracle.com
    Cc: chris.mason@oracle.com
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Link: http://lkml.kernel.org/n/tip-r74n3n8hhuc2ynbrnp3vt954@git.kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    cb83b629
topology.h 2.31 KB