From: Peter Zijlstra Date: Tue, 23 Mar 2010 18:31:15 +0000 (+0100) Subject: perf, x86: Fix AMD hotplug & constraint initialization X-Git-Tag: v2.6.34-rc4~75^2~6 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b38b24ead33417146e051453d04bf60b8d2d7e25;p=pandora-kernel.git perf, x86: Fix AMD hotplug & constraint initialization Commit 3f6da39 ("perf: Rework and fix the arch CPU-hotplug hooks") moved the amd northbridge allocation from CPUS_ONLINE to CPUS_PREPARE_UP however amd_nb_id() doesn't work yet on prepare so it would simply bail basically reverting to a state where we do not properly track node wide constraints - causing weird perf results. Fix up the AMD NorthBridge initialization code by allocating from CPU_UP_PREPARE and installing it from CPU_STARTING once we have the proper nb_id. It also properly deals with the allocation failing. Signed-off-by: Peter Zijlstra [ robustify using amd_has_nb() ] Signed-off-by: Stephane Eranian LKML-Reference: <1269353485.5109.48.camel@twins> Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed