| commit | 2232c2d8e0a6a31061dec311f3d1cf7624bc14f1 | |
| author | Steven Rostedt <rostedt@goodmis.org> | |
| Fri, 29 Feb 2008 17:46:50 +0000 (29 18:46 +0100) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Fri, 29 Feb 2008 17:46:50 +0000 (29 18:46 +0100) | ||
| tree | 1d90ec0b8bd4e3c154e386f005ef596ee25fa53f | treesnapshot (tar.gz zip) |
| parent | c0f4133b8f70769bc8dda977feb9a29109d6ccca | commitdiff |
rcu: add support for dynamic ticks and preempt rcu
The PREEMPT-RCU can get stuck if a CPU goes idle and NO_HZ is set. The
idle CPU will not progress the RCU through its grace period and a
synchronize_rcu my get stuck. Without this patch I have a box that will
not boot when PREEMPT_RCU and NO_HZ are set. That same box boots fine
with this patch.
This patch comes from the -rt kernel where it has been tested for
several months.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
The PREEMPT-RCU can get stuck if a CPU goes idle and NO_HZ is set. The
idle CPU will not progress the RCU through its grace period and a
synchronize_rcu my get stuck. Without this patch I have a box that will
not boot when PREEMPT_RCU and NO_HZ are set. That same box boots fine
with this patch.
This patch comes from the -rt kernel where it has been tested for
several months.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>