tree a1f559fd497b10c21479b378ffb262d517cb627b
parent ede6f5aea054d3fb67c78857f7abdee602302043
author Peter Zijlstra <peterz@infradead.org> 1227542817 +0100
committer Ingo Molnar <mingo@elte.hu> 1231350764 +0100

itimers: remove the per-cpu-ish-ness

Either we bounce once cacheline per cpu per tick, yielding n^2 bounces
or we just bounce a single..

Also, using per-cpu allocations for the thread-groups complicates the
per-cpu allocator in that its currently aimed to be a fixed sized
allocator and the only possible extention to that would be vmap based,
which is seriously constrained on 32 bit archs.

So making the per-cpu memory requirement depend on the number of
processes is an issue.

Lastly, it didn't deal with cpu-hotplug, although admittedly that might
be fixable.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>