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From:   Thomas Gleixner <tglx@linutronix.de>
To:     Ankur Arora <ankur.a.arora@oracle.com>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org
Cc:     torvalds@linux-foundation.org, akpm@linux-foundation.org,
        luto@kernel.org, bp@alien8.de, dave.hansen@linux.intel.com,
        hpa@zytor.com, mingo@redhat.com, juri.lelli@redhat.com,
        willy@infradead.org, mgorman@suse.de, peterz@infradead.org,
        rostedt@goodmis.org, vincent.guittot@linaro.org, jon.grimm@amd.com,
        bharata@amd.com, boris.ostrovsky@oracle.com,
        konrad.wilk@oracle.com, ankur.a.arora@oracle.com
Subject: Re: [PATCH 8/9] irqentry: define irqentry_exit_allow_resched()
In-Reply-To: <20230403052233.1880567-9-ankur.a.arora@oracle.com>
References: <20230403052233.1880567-1-ankur.a.arora@oracle.com>
 <20230403052233.1880567-9-ankur.a.arora@oracle.com>
Date:   Tue, 04 Apr 2023 11:38:18 +0200
Message-ID: <87pm8kq96d.ffs@tglx>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

On Sun, Apr 02 2023 at 22:22, Ankur Arora wrote:
> Allow threads marked TIF_ALLOW_RESCHED to be rescheduled in irqexit.
>
> This is only necessary under !preempt_model_preemptible() for which
> we reuse the same logic as irqentry_exit_code_resched().

This tells what this patch is doing but completely fails to explain why
this is necessary and useful.

Thanks,

        tglx