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dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1695148670; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2DSa9TkjHB6EV8pTekifFHxcoJahssMMjvKejCDr1qY=; b=sEaqMnzmLWcR5sTqPuKUSsDNSLiFwEB2q10pHZWktZHWWZ7rad9iwTCauy0eSy+3P7bPlz gdIjr7zB0NFSM9IPX8jXSfBZtIYCNeqJ3O/r6ihWhXset3g323MXy6loL966i0cTuaRGsv W1o+5DQ5FHvAYq+aNpnj2RqI5dcEBrM= Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 542FBB8168C; Tue, 19 Sep 2023 18:37:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 49CD8C433C8; Tue, 19 Sep 2023 18:37:43 +0000 (UTC) Date: Tue, 19 Sep 2023 14:38:16 -0400 From: Steven Rostedt To: Thomas Gleixner Cc: Linus Torvalds , John Paul Adrian Glaubitz , Peter Zijlstra , Matthew Wilcox , Ankur Arora , linux-kernel@vger.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, 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, Geert Uytterhoeven , linux-m68k@lists.linux-m68k.org, Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Brian Cain , linux-hexagon@vger.kernel.org, Richard Henderson , Ivan Kokshaysky , Matt Turner , linux-alpha@vger.kernel.org Subject: Re: Arches that don't support PREEMPT Message-ID: <20230919143816.1741760a@gandalf.local.home> In-Reply-To: <87pm2eui95.ffs@tglx> References: <87zg1u1h5t.fsf@oracle.com> <20230911150410.GC9098@noisy.programming.kicks-ass.net> <87h6o01w1a.fsf@oracle.com> <20230912082606.GB35261@noisy.programming.kicks-ass.net> <87cyyfxd4k.ffs@tglx> <87led2wdj0.ffs@tglx> <0e69f7df80dc5878071deb0d80938138d19de1d1.camel@physik.fu-berlin.de> <20230919134218.GA39281@noisy.programming.kicks-ass.net> <87pm2eui95.ffs@tglx> X-Mailer: Claws Mail 3.19.1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 4017418001D X-Stat-Signature: bnm1dti4c4jqftsc7stssaij9ue646t9 X-HE-Tag: 1695148670-231666 X-HE-Meta: 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 djdYz1kW X6RYzGozQswjO0Qhu72a5vH+h7ptsqv4o3nPmEFl5ZfD0NAfRdtCt65sO5T3Y0/6A1IQbxbBDt7RN+GyaiNaVJnMMvFlqm4AHobkDlEue2uUnN3+rdMoqLUe1iRIIRO4s+7gSsSFIqNtzJJNUu2gsaG9puEYmmgmtm9YQKqjN87PN+agrwUOoWFlT/6k8lydQ09fC/NMbTwKYsk+cRa31bNjnJA/pjBzwdKqhUQSbvXTW0ODMN3zRqtWb9LtOw/gPDkdH//pq8hhRNQuIcSs4MxotEJKOICZZIesspzREB2DG1mcvMlt3AzhKA6wbGIDxA/pYX6Hw/iCbrL9o1BROa7ckd9moV6MbbC7z 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, 19 Sep 2023 20:31:50 +0200 Thomas Gleixner wrote: > The removal of cond_resched() might cause latencies, but then I doubt > that these museus pieces are used for real work :) We could simply leave the cond_resched() around but defined as nops for everything but the "nostalgia club" to keep them from having any regressions. -- Steve