tree da8c244fd7fd7eef7a413ad8df2f19b32d4a7c52
parent 138c5d258cf06c278f5d7fe0a806e50fe413a08f
author Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> 1171100705 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1171219888 -0800

[PATCH] Relay: add CPU hotplug support

Mathieu originally needed to add this for tracing Xen, but it's something
that's needed for any application that can be tracing while cpus are added.

unplug isn't supported by this patch.  The thought was that at minumum a new
buffer needs to be added when a cpu comes up, but it wasn't worth the effort
to remove buffers on cpu down since they'd be freed soon anyway when the
channel was closed.

[zanussi@us.ibm.com: avoid lock_cpu_hotplug deadlock]
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Tom Zanussi <zanussi@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>