linux-kernel - Re: How to print stack uses of IRQ in ARM64

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Message-ID: <CAHp75VcTvMKy8h_2gztav2FOUvE1QG01FByTNmc=x0bdyRx5Dg@mail.gmail.com>
Date:   Tue, 5 Jun 2018 16:12:40 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Vishnu Motghare <vishnumotghare@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Marc Zyngier <marc.zyngier@....com>
Subject: Re: How to print stack uses of IRQ in ARM64

If you would like to get an answer in a reasonable time it might make
sense to Cc: people related to a subject.
I Cc:ed Marc here with hope he is a guy for the topic.

On Thu, May 31, 2018 at 1:01 PM, Vishnu Motghare
<vishnumotghare@...il.com> wrote:
> I found this discussion (https://lwn.net/Articles/657969/) regarding
> implementation of separate IRQ stack for  ARM64.
>
> My understanding is each CPU  getting its own IRQ stack. So is it
> possible to print the stack uses of each IRQ handler? like, How much
> stack is used & how much left free ?
>
> like in process context we have API like stack_not_used(struct
> task_struct *p) to get the unused stack  of processes. So, is it
> possible to get the similar result for IRQ?



-- 
With Best Regards,
Andy Shevchenko