From: Thomas Gleixner <tglx@linutronix.de>
To: Dexuan Cui <decui@microsoft.com>,
Saeed Mahameed <saeed@kernel.org>,
Leon Romanovsky <leon@kernel.org>
Cc: "linux-pci\@vger.kernel.org" <linux-pci@vger.kernel.org>,
"'netdev\@vger.kernel.org'" <netdev@vger.kernel.org>,
"'x86\@kernel.org'" <x86@kernel.org>,
Haiyang Zhang <haiyangz@microsoft.com>,
"'linux-kernel\@vger.kernel.org'" <linux-kernel@vger.kernel.org>
Subject: RE: [5.14-rc1] mlx5_core receives no interrupts with maxcpus=8
Date: Wed, 21 Jul 2021 23:16:41 +0200 [thread overview]
Message-ID: <87czrbpdty.ffs@nanos.tec.linutronix.de> (raw)
In-Reply-To: <BYAPR21MB127077DE03164CA31AE0B33DBFE19@BYAPR21MB1270.namprd21.prod.outlook.com>
Dexuan,
On Mon, Jul 19 2021 at 20:33, Dexuan Cui wrote:
> This is a bare metal x86-64 host with Intel CPUs. Yes, I believe the
> issue is in the IOMMU Interrupt Remapping mechanism rather in the
> NIC driver. I just don't understand why bringing the CPUs online and
> offline can work around the issue. I'm trying to dump the IOMMU IR
> table entries to look for any error.
can you please enable GENERIC_IRQ_DEBUGFS and provide the output of
cat /sys/kernel/debug/irq/irqs/$THENICIRQS
Thanks,
tglx
next prev parent reply other threads:[~2021-07-21 21:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-15 0:38 [5.14-rc1] mlx5_core receives no interrupts with maxcpus=8 Dexuan Cui
2021-07-15 1:11 ` Dexuan Cui
2021-07-18 9:12 ` Leon Romanovsky
2021-07-19 20:17 ` Saeed Mahameed
2021-07-19 20:33 ` Dexuan Cui
2021-07-21 21:16 ` Thomas Gleixner [this message]
2021-08-18 21:08 ` Dexuan Cui
2021-08-19 20:41 ` Dexuan Cui
[not found] <draft-87h7fa1m37.ffs@tglx>
2021-08-28 20:44 ` Thomas Gleixner
2021-08-29 20:11 ` Dexuan Cui
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