From 755609a9087fa983f567dc5452b2fa7b089b591f Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Tue, 19 Jun 2012 17:18:20 -0700 Subject: [PATCH] rcu: Allow RCU grace-period initialization to be preempted RCU grace-period initialization is currently carried out with interrupts disabled, which can result in 200-microsecond latency spikes on systems on which RCU has been configured for 4096 CPUs. This patch therefore makes the RCU grace-period initialization be preemptible, which should eliminate those latency spikes. Similar spikes from grace-period cleanup and the forcing of quiescent states will be dealt with similarly by later patches. Reported-by: Mike Galbraith Reported-by: Dimitri Sivanich Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett --- Reading git-format-patch failed