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From: Wen Xiong <wenxiong@linux.ibm.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, gjoyce@linux.ibm.com,
	linux-pci@vger.kernel.org, Bjorn Helgaas <helgaas@kernel.org>,
	linux-scsi@vger.kernel.org
Subject: Re: [PATCH 1/1] genirq/msi: Dynamic remove/add stroage adapter hits EEH
Date: Tue, 01 Apr 2025 15:14:49 -0500	[thread overview]
Message-ID: <e83622773199665d39db5f724537d9dd@linux.ibm.com> (raw)
In-Reply-To: <87wmc9wg2z.ffs@tglx>

On 2025-03-28 06:27, Thomas Gleixner wrote:

> You are completely missing the point. This is not a problem restricted
> to PCI/MSI interrupts.
> 
Thanks for all suggestions! I will investigate more and check if we can 
fix it in device driver.

Looks several device drivers in kernel use two kernel APIs to set/clean 
IRQ_NO_BALACING status for a given irq.

irq_set_status_flags(irq, IRQ_NO_BALANCING);
irq_clear_status_flags(irq, IRQ_NO_BALANCING);

With these two APIs, device driver can decide if using kernel irq 
balance or setting irq affinity by driver itself?

So we can set/clear IRQ_NO_BALANCING during reset.

Thanks,
Wendy


  reply	other threads:[~2025-04-01 20:15 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-03-19 12:14 [PATCH 1/1] genirq/msi: Dynamic remove/add stroage adapter hits EEH wenxiong
2025-03-19 16:15 ` Thomas Gleixner
2025-03-20  2:58   ` Wen Xiong
2025-03-20  8:23     ` Thomas Gleixner
2025-03-20  8:48       ` Thomas Gleixner
2025-03-27 21:36         ` Wen Xiong
2025-03-28 11:27           ` Thomas Gleixner
2025-04-01 20:14             ` Wen Xiong [this message]
2025-04-02  8:33               ` Thomas Gleixner

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