linux-kernel - Re: [PATCH REPOST] irq_poll: Add local_bh_disable() in cpu

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Message-ID: <YgYDePJLsVLXKqEP@infradead.org>
Date:   Thu, 10 Feb 2022 22:34:32 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Christoph Hellwig <hch@...radead.org>,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH REPOST] irq_poll: Add local_bh_disable() in cpu_dead
 notifier

On Thu, Feb 10, 2022 at 01:33:39PM +0100, Sebastian Andrzej Siewior wrote:
> You need to handle the pending softirqs. If you don't handle them
> immediately or in a deterministic say (like on IRQ exit) then they will
> be handled at a random point.

Yes.  Just like regular interrupts.