On Mon, 2011-02-07 at 14:54 +0100, Peter Zijlstra wrote:
On Mon, 2011-02-07 at 10:26 +1100, Benjamin Herrenschmidt wrote:
You missed:
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 9813605..467d122 100644
--- a/arch/powerpc/kernel/smp.c
+++
On Wed, 2011-02-09 at 17:14 +1100, Benjamin Herrenschmidt wrote:
On Mon, 2011-02-07 at 14:54 +0100, Peter Zijlstra wrote:
On Mon, 2011-02-07 at 10:26 +1100, Benjamin Herrenschmidt wrote:
You missed:
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index
On Mon, 2011-02-07 at 10:26 +1100, Benjamin Herrenschmidt wrote:
You missed:
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 9813605..467d122 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -98,6 +98,7 @@ void smp_message_recv(int msg)
On Mon, 2011-01-17 at 12:07 +0100, Peter Zijlstra wrote:
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 68034bb..7ee0fc3 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -128,6 +128,7 @@ static irqreturn_t call_function_action(int irq, void
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
On Mon, 2011-01-17 at 11:26 +, Russell King - ARM Linux wrote:
On Mon, Jan 17, 2011 at 12:07:13PM +0100, Peter Zijlstra wrote:
diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index 42aa078..c4a570b 100644
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@
On Mon, 2011-01-17 at 12:31 +0100, Peter Zijlstra wrote:
On Mon, 2011-01-17 at 11:26 +, Russell King - ARM Linux wrote:
Maybe remove the comment everything is done on the interrupt return path
as with this function call, that is no longer the case.
(Removed am33, m32r-ka, m32r,
On Mon, Jan 17, 2011 at 12:07:13PM +0100, Peter Zijlstra wrote:
diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index 42aa078..c4a570b 100644
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@ -587,6 +587,7 @@ handle_ipi(struct pt_regs *regs)
case
On Mon, Jan 17, 2011 at 12:41:49PM +0100, Peter Zijlstra wrote:
===
--- linux-2.6.orig/arch/arm/kernel/smp.c
+++ linux-2.6/arch/arm/kernel/smp.c
@@ -575,10 +575,7 @@ asmlinkage void __exception do_IPI(struc
On Mon, 17 Jan 2011 12:07:13 +0100
Peter Zijlstra pet...@infradead.org wrote:
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.
diff --git
On 1/17/2011 6:41 AM, Peter Zijlstra wrote:
Index: linux-2.6/arch/tile/kernel/smp.c
===
--- linux-2.6.orig/arch/tile/kernel/smp.c
+++ linux-2.6/arch/tile/kernel/smp.c
@@ -184,12 +184,8 @@ void flush_icache_range(unsigned long st
On Mon, Jan 17, 2011 at 12:41:49PM +0100, Peter Zijlstra wrote:
Index: linux-2.6/arch/cris/arch-v32/kernel/smp.c
===
--- linux-2.6.orig/arch/cris/arch-v32/kernel/smp.c
+++ linux-2.6/arch/cris/arch-v32/kernel/smp.c
@@ -340,15
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:
On Mon, Jan 17, 2011 at 06:07, Peter Zijlstra wrote:
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.
not really. see changelog of commit 73a400646b8e26615f3ef1a0a4bc0cd0d5bd284c.
-mike
On Mon, 2011-01-17 at 14:49 -0500, Mike Frysinger wrote:
On Mon, Jan 17, 2011 at 06:07, Peter Zijlstra wrote:
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.
not really. see changelog of commit
On Mon, 2011-01-17 at 12:07 +0100, 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
On Tue, 2011-01-18 at 07:31 +1100, Benjamin Herrenschmidt wrote:
Beware of false positive, I've used fake reschedule IPIs in the past
for other things (like kicking a CPU out of sleep state for unrelated
reasons). Nothing that I know that is upstream today but some of that
might come back.
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