linux-kernel - Re: [ARM64] Printing IRQ stack usage information

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Message-ID: <49219.1542367988@turing-police.cc.vt.edu>
Date:   Fri, 16 Nov 2018 06:33:08 -0500
From:   valdis.kletnieks@...edu
To:     Pintu Agarwal <pintu.ping@...il.com>
cc:     open list <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        kernelnewbies@...nelnewbies.org,
        Jungseok Lee <jungseoklee85@...il.com>,
        catalin.marinas@....com, will.deacon@....com,
        Takahiro Akashi <takahiro.akashi@...aro.org>,
        mark.rutland@....com, Sungjinn Chung <barami97@...il.com>
Subject: Re: [ARM64] Printing IRQ stack usage information

On Fri, 16 Nov 2018 11:44:36 +0530, Pintu Agarwal said:

> > If your question is "Did one
> > of the CPUs blow out its IRQ stack (or come close to doing so)?" there's better
> > approaches.
> >
> Yes, exactly, this is what the main intention.
> If you have any better idea about this approach, please refer me.
> It will be of great help.

Look at the code controlled by '#ifdef CONFIG_DEBUG_STACK_USAGE'
which does the same thing for process stacks, or CONFIG_SCHED_STACK_END_CHECK
or the use of guard pages for detecting stack overrun....