tree c94f9f6c1e8dcc68c2a30caaff64db7e81a65510
parent 2b8a0cf4890d7537a77b51caa8f508e4a05a0e67
author Steven Rostedt <rostedt@goodmis.org> 1215576931 -0400
committer Ingo Molnar <mingo@elte.hu> 1215784407 +0200

sched_clock: only update deltas with local reads.

Reading the CPU clock should try to stay accurate within the CPU.
By reading the CPU clock from another CPU and updating the deltas can
cause unneeded jumps when reading from the local CPU.

This patch changes the code to update the last read TSC only when read
from the local CPU.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>