From: Thomas Gleixner <tglx@linutronix.de>
To: YASUAKI ISHIMATSU <yasu.isimatu@gmail.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>,
Hannes Reinecke <hare@suse.de>,
Marc Zyngier <marc.zyngier@arm.com>,
Christoph Hellwig <hch@lst.de>,
axboe@kernel.dk, mpe@ellerman.id.au, keith.busch@intel.com,
peterz@infradead.org, LKML <linux-kernel@vger.kernel.org>,
linux-scsi@vger.kernel.org,
Sumit Saxena <sumit.saxena@broadcom.com>,
Shivasharan Srikanteshwara
<shivasharan.srikanteshwara@broadcom.com>
Subject: Re: system hung up when offlining CPUs
Date: Tue, 3 Oct 2017 23:44:33 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1710032328280.2278@nanos> (raw)
In-Reply-To: <78ce7246-c567-3f5f-b168-9bcfc659d4bd@gmail.com>
On Mon, 2 Oct 2017, YASUAKI ISHIMATSU wrote:
> On 09/16/2017 11:02 AM, Thomas Gleixner wrote:
> > Which driver are we talking about?
>
> We are talking about megasas driver.
Can you please apply the debug patch below.
After booting enable stack traces for the tracer:
# echo 1 >/sys/kernel/debug/tracing/options/stacktrace
Then offline CPUs 24-29. After that do
# cat /sys/kernel/debug/tracing/trace >somefile
Please compress the file and upload it to some place or if you have no place
to upload it then send it to me in private mail.
Thanks,
tglx
8<------------
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -171,11 +171,16 @@ void irq_set_thread_affinity(struct irq_
int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
bool force)
{
+ const struct cpumask *eff = irq_data_get_effective_affinity_mask(data);
struct irq_desc *desc = irq_data_to_desc(data);
struct irq_chip *chip = irq_data_get_irq_chip(data);
int ret;
ret = chip->irq_set_affinity(data, mask, force);
+
+ trace_printk("irq: %u ret %d mask: %*pbl eff: %*pbl\n", data->irq, ret,
+ cpumask_pr_args(mask), cpumask_pr_args(eff));
+
switch (ret) {
case IRQ_SET_MASK_OK:
case IRQ_SET_MASK_OK_DONE:
next prev parent reply other threads:[~2017-10-03 21:44 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-08 19:25 system hung up when offlining CPUs YASUAKI ISHIMATSU
2017-08-09 11:42 ` Marc Zyngier
2017-08-09 19:09 ` YASUAKI ISHIMATSU
2017-08-10 11:54 ` Marc Zyngier
2017-08-21 12:07 ` Christoph Hellwig
2017-08-21 13:18 ` Christoph Hellwig
2017-08-21 13:37 ` Marc Zyngier
2017-09-07 20:23 ` YASUAKI ISHIMATSU
2017-09-12 18:15 ` YASUAKI ISHIMATSU
2017-09-13 11:13 ` Hannes Reinecke
2017-09-13 11:35 ` Kashyap Desai
2017-09-13 13:33 ` Thomas Gleixner
2017-09-14 16:28 ` YASUAKI ISHIMATSU
2017-09-16 10:15 ` Thomas Gleixner
2017-09-16 15:02 ` Thomas Gleixner
2017-10-02 16:36 ` YASUAKI ISHIMATSU
2017-10-03 21:44 ` Thomas Gleixner [this message]
2017-10-04 21:04 ` Thomas Gleixner
2017-10-09 11:35 ` [tip:irq/urgent] genirq/cpuhotplug: Add sanity check for effective affinity mask tip-bot for Thomas Gleixner
2017-10-09 11:35 ` [tip:irq/urgent] genirq/cpuhotplug: Enforce affinity setting on startup of managed irqs tip-bot for Thomas Gleixner
2017-10-10 16:30 ` system hung up when offlining CPUs YASUAKI ISHIMATSU
2017-10-16 18:59 ` YASUAKI ISHIMATSU
2017-10-16 20:27 ` Thomas Gleixner
2017-10-30 9:08 ` Shivasharan Srikanteshwara
2017-11-01 0:47 ` Thomas Gleixner
2017-11-01 11:01 ` Hannes Reinecke
2017-10-04 21:10 ` Thomas Gleixner
-- strict thread matches above, loose matches on Subject: below --
2017-08-08 19:24 YASUAKI ISHIMATSU
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