Peter Zijlstra c3c87e7704 perf: Tighten (and fix) the grouping condition ... The fix from 9fc81d8742 ("perf: Fix events installation during moving group") was incomplete in that it failed to recognise that creating a group with events for different CPUs is semantically broken -- they cannot be co-scheduled. Furthermore, it leads to real breakage where, when we create an event for CPU Y and then migrate it to form a group on CPU X, the code gets confused where the counter is programmed -- triggered in practice as well by me via the perf fuzzer. Fix this by tightening the rules for creating groups. Only allow grouping of counters that can be co-scheduled in the same context. This means for the same task and/or the same cpu. Fixes: 9fc81d8742 ("perf: Fix events installation during moving group") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20150123125834.090683288@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2015-01-28 13:17:35 +01:00
..
acpi	ACPI / processor: Convert apic_id to phys_id to make it arch agnostic	2015-01-05 23:32:42 +01:00
asm-generic	mm: mmu_gather: use tlb->end != 0 only for TLB invalidation	2015-01-13 15:20:40 +13:00
clocksource
crypto	crypto: af_alg - add user space interface for AEAD	2014-12-05 23:56:55 +08:00
drm	Revert "drm/gem: Warn on illegal use of the dumb buffer interface v2"	2014-12-24 13:13:22 +10:00
dt-bindings	ARM: dt: GIC: Spelling s/specific/specifier/, s/flaggs/flags/	2015-01-13 13:48:16 -06:00
keys
kvm	arm/arm64: KVM: Require in-kernel vgic for the arch timers	2014-12-15 11:50:42 +01:00
linux	perf: Tighten (and fix) the grouping condition	2015-01-28 13:17:35 +01:00
math-emu
media	[media] media: v4l2-image-sizes.h: correct the SVGA height definition	2014-12-04 13:56:56 -02:00
memory
misc
net	genetlink: synchronize socket closing and family removal	2015-01-16 17:04:25 -05:00
pcmcia
ras
rdma	IB/core: Implement support for MMU notifiers regarding on demand paging regions	2014-12-15 18:13:36 -08:00
rxrpc
scsi	SCSI for-linus on 20141220	2014-12-20 13:42:57 -08:00
soc	Merge branch 'at91/cleanup5' into next/drivers	2014-12-08 18:29:20 +01:00
sound	ALSA: pcm: Fix kerneldoc for params_*() functions	2014-12-30 16:41:11 +01:00
target	target: Drop left-over fabric_max_sectors attribute	2015-01-09 15:22:05 -08:00
trace	KVM: fix sparse warning in include/trace/events/kvm.h	2015-01-19 11:07:57 +01:00
uapi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-01-20 18:19:31 +12:00
video	OMAPDSS: Remove all references to obsolete HDMI audio callbacks	2014-12-01 11:09:59 +02:00
xen	x86/xen: properly retrieve NMI reason	2015-01-13 09:39:50 +00:00
Kbuild