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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()
Date: Tue, 04 Apr 2023 11:38:18 +0200	[thread overview]
Message-ID: <87pm8kq96d.ffs@tglx> (raw)
In-Reply-To: <20230403052233.1880567-9-ankur.a.arora@oracle.com>

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


  reply	other threads:[~2023-04-04  9:38 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-03  5:22 [PATCH 0/9] x86/clear_huge_page: multi-page clearing Ankur Arora
2023-04-03  5:22 ` [PATCH 1/9] huge_pages: get rid of process_huge_page() Ankur Arora
2023-04-03  5:22 ` [PATCH 2/9] huge_page: get rid of {clear,copy}_subpage() Ankur Arora
2023-04-03  5:22 ` [PATCH 3/9] huge_page: allow arch override for clear/copy_huge_page() Ankur Arora
2023-04-03  5:22 ` [PATCH 4/9] x86/clear_page: parameterize clear_page*() to specify length Ankur Arora
2023-04-06  8:19   ` Peter Zijlstra
2023-04-07  3:03     ` Ankur Arora
2023-04-03  5:22 ` [PATCH 5/9] x86/clear_pages: add clear_pages() Ankur Arora
2023-04-06  8:23   ` Peter Zijlstra
2023-04-07  0:50     ` Ankur Arora
2023-04-07 10:34       ` Peter Zijlstra
2023-04-09 13:26         ` Matthew Wilcox
2023-04-03  5:22 ` [PATCH 6/9] mm/clear_huge_page: use multi-page clearing Ankur Arora
2023-04-03  5:22 ` [PATCH 7/9] sched: define TIF_ALLOW_RESCHED Ankur Arora
2023-04-05 20:07   ` Peter Zijlstra
2023-04-03  5:22 ` [PATCH 8/9] irqentry: define irqentry_exit_allow_resched() Ankur Arora
2023-04-04  9:38   ` Thomas Gleixner [this message]
2023-04-05  5:29     ` Ankur Arora
2023-04-05 20:22   ` Peter Zijlstra
2023-04-06 16:56     ` Ankur Arora
2023-04-06 20:13       ` Peter Zijlstra
2023-04-06 20:16         ` Peter Zijlstra
2023-04-07  2:29         ` Ankur Arora
2023-04-07 10:23           ` Peter Zijlstra
2023-04-03  5:22 ` [PATCH 9/9] x86/clear_huge_page: make clear_contig_region() preemptible Ankur Arora
2023-04-05 20:27   ` Peter Zijlstra
2023-04-06 17:00     ` Ankur Arora
2023-04-05 19:48 ` [PATCH 0/9] x86/clear_huge_page: multi-page clearing Raghavendra K T
2023-04-08 22:46   ` Ankur Arora
2023-04-10  6:26     ` Raghavendra K T

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