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t=1671022842; bh=POT7ff21J0hjrhDir02ZLiDMjcG6kodQY8QRBTFQv8U=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=dv841yBJ6H9naJe1+vSQTOP7hlp7NAl7HnSToSASDL0Jcz11uhVw/GOpGJdwyNhE6 XyxetkugZd/ASmUbs3jORP5OS7SfxRaIpfpyqHwC4vA0FvMk7woC52Ch55Lj6k/BuB qnwitZbvfFfCK/F5hyLmbHQu5Q+yWUXqMoV8iWYm88MuV2QFKqu7YtTfWzRip4f3uX hmRuqo+0jh/ftgIv3pVhTgK19a8IBehOEYSN9ZJl2AwnuPLImD7kiBHyFfFPYa3RXQ KoRVpdoxlE1PSfplN3IBReUi03BPJUfm/gYBkAF1qLeqBv3rZehwwH7T1KnQvNKQmt LJwz32y0myfdw== Date: Wed, 14 Dec 2022 14:00:40 +0100 From: Frederic Weisbecker To: Marcelo Tosatti Cc: atomlin@redhat.com, cl@linux.com, tglx@linutronix.de, mingo@kernel.org, peterz@infradead.org, pauld@redhat.com, neelx@redhat.com, oleksandr@natalenko.name, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v9 4/5] tick/nohz_full: Ensure quiet_vmstat() is called on exit to user-mode when the idle tick is stopped Message-ID: <20221214130040.GC1930067@lothringen> References: <20221206161826.698593151@redhat.com> <20221206162416.509808578@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221206162416.509808578@redhat.com> X-Rspamd-Queue-Id: 705AA14001A X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: ukpe6o7tsky6j635eszfinhybo8tex1s X-HE-Tag: 1671022844-228079 X-HE-Meta: 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 cF9hmPLN ILXUyLGCDDJU+lC8ww121O9/ysUN8GF6sx4Oyhw7ZcS0zGaB5YS3QztxBMaSJhRkTHkSM6WcRU9IIr9I= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Dec 06, 2022 at 01:18:30PM -0300, Marcelo Tosatti wrote: > From: Aaron Tomlin > > This patch ensures CPU-specific vmstat differentials do not remain > when the scheduling-tick is stopped and before exiting to user-mode > in the context of nohz_full only. Please also don't forget to mention why this change is needed. Thanks.