In answer to Andrew:
> How do we communicate this new design/feature to our users?
> Documentation/cpusets.txt, perhaps? Documentation/cpu-hotplug.txt?
> git-log? ;)
Patch "[PATCH 1/1] V4: hotplug cpu: migrate a task within its cpuset" may
warrant an addition to the documentation. I would propose this note
in cpu-hotplug.txt.
Diffed against 2.6.23-rc3
Signed-off-by: Cliff Wickman <[email protected]>
---
Documentation/cpu-hotplug.txt | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
Index: linus.070821/Documentation/cpu-hotplug.txt
===================================================================
--- linus.070821.orig/Documentation/cpu-hotplug.txt
+++ linus.070821/Documentation/cpu-hotplug.txt
@@ -220,7 +220,9 @@ A: The following happen, listed in no pa
CPU_DOWN_PREPARE or CPU_DOWN_PREPARE_FROZEN, depending on whether or not the
CPU is being offlined while tasks are frozen due to a suspend operation in
progress
-- All process is migrated away from this outgoing CPU to a new CPU
+- All processes are migrated away from this outgoing CPU to new CPUs.
+ The new CPU is chosen from each process' current cpuset, which may be
+ a subset of all online CPUs.
- All interrupts targeted to this CPU is migrated to a new CPU
- timers/bottom half/task lets are also migrated to a new CPU
- Once all services are migrated, kernel calls an arch specific routine
--
Cliff Wickman
Silicon Graphics, Inc.
[email protected]
(651) 683-3824