On 01/17/2011 03:07 AM, Peter Zijlstra wrote:
For future rework of try_to_wake_up() we'd like to push part of that
onto the CPU the task is actually going to run on, in order to do so we
need a generic callback from the existing scheduler IPI.
This patch introduces such a generic callback: scheduler_ipi() and
implements it as a NOP.
I visited existing smp_send_reschedule() implementations and tried to
add a call to scheduler_ipi() in their handler part, but esp. for MIPS
I'm not quite sure I actually got all of them.
Also, while reading through all this, I noticed the blackfin SMP code
looks to be broken, it simply discards any IPI when low on memory.
Signed-off-by: Peter Zijlstra<a.p.zijls...@chello.nl>
---
arch/alpha/kernel/smp.c | 1 +
arch/arm/kernel/smp.c | 1 +
arch/blackfin/mach-common/smp.c | 3 ++-
arch/cris/arch-v32/kernel/smp.c | 13 ++++++++-----
arch/ia64/kernel/irq_ia64.c | 2 ++
arch/ia64/xen/irq_xen.c | 10 +++++++++-
arch/m32r/kernel/smp.c | 2 +-
arch/mips/kernel/smtc.c | 1 +
arch/mips/sibyte/bcm1480/smp.c | 7 +++----
arch/mips/sibyte/sb1250/smp.c | 7 +++----
[...]
Peter,
You will also have to patch the mailbox_interrupt() function in
arch/mips/cavium-octeon/smp.c
David Daney.
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