Ksoftirqd shouldn't need softirq stack since it's executing
in a kernel thread with a callstack that is only beginning at
this stage.
Lets comment about that for clarity.
Signed-off-by: Frederic Weisbecker <fweis...@gmail.com>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Paul Mackerras <pau...@au1.ibm.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Paul Mackerras <pau...@au1.ibm.com>
Cc: James Hogan <james.ho...@imgtec.com>
Cc: James E.J. Bottomley <j...@parisc-linux.org>
Cc: Helge Deller <del...@gmx.de>
Cc: Martin Schwidefsky <schwidef...@de.ibm.com>
Cc: Heiko Carstens <heiko.carst...@de.ibm.com>
Cc: David S. Miller <da...@davemloft.net>
Cc: Andrew Morton <a...@linux-foundation.org>
---
kernel/softirq.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 8c8f08b..1b0f48e 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -759,6 +759,10 @@ static void run_ksoftirqd(unsigned int cpu)
{
local_irq_disable();
if (local_softirq_pending()) {
+ /*
+ * Execute softirq on inline stack, as we are not deep in
+ * the task stack here.
+ */
__do_softirq();
rcu_note_context_switch(cpu);
local_irq_enable();
--
1.8.3.1
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