From: Peter Zijlstra Date: Sat, 9 Apr 2011 19:17:47 +0000 (+0200) Subject: perf: Change close() semantics for group events X-Git-Tag: v3.1-rc1~299^2~47 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e03a9a55b4e45377af9ca3d464135f9ea280b8f8;p=pandora-kernel.git perf: Change close() semantics for group events In order to always call list_del_event() on the correct cpu if the event is part of an active context and avoid having to do two IPIs, change the close() semantics slightly. The current perf_event_disable() call would disable a whole group if the event that's being closed is the group leader, whereas the new code keeps the group siblings enabled. People should not rely on this behaviour and I don't think they do, but in case we find they do, the fix is easy and we have to take the double IPI cost. Signed-off-by: Peter Zijlstra Cc: Vince Weaver Link: http://lkml.kernel.org/r/20110409192142.038377551@chello.nl Signed-off-by: Ingo Molnar --- Reading git-diff-tree failed