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Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1r0eTE-0005fY-P5; Wed, 08 Nov 2023 09:03:33 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 2085330049D; Wed, 8 Nov 2023 10:03:33 +0100 (CET) Date: Wed, 8 Nov 2023 10:03:33 +0100 From: Peter Zijlstra To: Ankur Arora Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, torvalds@linux-foundation.org, paulmck@kernel.org, linux-mm@kvack.org, x86@kernel.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, vincent.guittot@linaro.org, willy@infradead.org, mgorman@suse.de, jon.grimm@amd.com, bharata@amd.com, raghavendra.kt@amd.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com, jgross@suse.com, andrew.cooper3@citrix.com, mingo@kernel.org, bristot@kernel.org, mathieu.desnoyers@efficios.com, geert@linux-m68k.org, glaubitz@physik.fu-berlin.de, anton.ivanov@cambridgegreys.com, mattst88@gmail.com, krypton@ulrich-teichert.org, rostedt@goodmis.org, David.Laight@aculab.com, richard@nod.at, mjguzik@gmail.com Subject: Re: [RFC PATCH 38/86] sched: *_tsk_need_resched() now takes resched_t Message-ID: <20231108090333.GI8262@noisy.programming.kicks-ass.net> References: <20231107215742.363031-1-ankur.a.arora@oracle.com> <20231107215742.363031-39-ankur.a.arora@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231107215742.363031-39-ankur.a.arora@oracle.com> X-Stat-Signature: 8t4znxp4kepxbqjwxnsriw5jnh9ty89c X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: A2D0EC000E X-Rspam-User: X-HE-Tag: 1699434239-240248 X-HE-Meta: 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 Oo9WRWH/ uMNVwOnb4UHTH1vnab+u27wA6unFmu8WQXz1pWdCb5nVIlE+T9DFhj59G7bPvlhMOqNZXM6doxRzZxzgFN6Op2btg4WK+oIPswn6HnRh/kpVMQqcD+uO5Tqq0r1FiZV4s0F1kHgInD5lH7VfaD+a6cGafRPXQvMLzHmxQ9KBYyRqdk018Ee2hiyCBPQ== 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: List-Subscribe: List-Unsubscribe: On Tue, Nov 07, 2023 at 01:57:24PM -0800, Ankur Arora wrote: > *_tsk_need_resched() need to test for the specific need-resched > flag. > > The only users are RCU and the scheduler. For RCU we always want > to schedule at the earliest opportunity and that is always > RESCHED_eager. Why ? > > For the scheduler, keep everything as RESCHED_eager for now. Why ?