From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7673F267AF2; Tue, 29 Apr 2025 20:28:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745958503; cv=none; b=SYXm+9IQQDqx3ls5qUzhfkdNEBxRH7+KpLSvw2G1CgGOYbV5s3Fp6MMoz2S1yYDPGIFKGR8yPVRP0GtY7nR1Vq3Fvg+KZLiqxoQE0SBeiJVvSp5WRL/p0ItDJJgP44mtFZI/Q5v4G7SmwPfga4fyTX3ZKdHL5Mq+UIsCecgu7jA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745958503; c=relaxed/simple; bh=yVQiGQTIo9RNGx1kcMdYwpv2Iyy6ige9ZYny4OmlJuw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=FOy/WEaJWXPzha39EqI94WYBw88JLwF5zkfuvTFGegBtg9b+XVIKqVedxPPFB4uLDIGS+QVlAoy7QpTHQfxI1C0MB9Ki28BW36ifccu7iBt5AQE3IhwlmyXJWLR2GgpoHhJpE1xOfFLFgDnogbwsrJPiPoSf1bX2AvWx/IrB9B8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=t94tYQyv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="t94tYQyv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 858EDC4CEE3; Tue, 29 Apr 2025 20:28:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745958503; bh=yVQiGQTIo9RNGx1kcMdYwpv2Iyy6ige9ZYny4OmlJuw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t94tYQyva5/fI1bTsOvrcAuWZgqTtzIRx5afVtXJ9exMTO1hd3U2ECNxmayHBYrEK tDYlVQkhTOx2twKfjj2BY4I0hx1LJA7RKTx6Rj/ftyIWQs2G8Boy6M+1dewrs3xwEQ /REjkLXORQ5poiLHG/sElok6YHGE8GSobRwUb1EHtbrnlujYccq8Ob8FTWm1ptUhYm z9T91wkFj8X4UhQbmaiTkaW9J77yLdQMi7m+lOIT/Ul/8fE/EUd81YPBySTp/7EwWV imRWR+vM+WxKzF8nU9sqUMCyHOAoRDgl/Bl6N2jOJBZ1RQxcjirl1l6leAjN/UR+CK Kx44aNX35py5w== From: Will Deacon To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, Valentin Schneider Cc: catalin.marinas@arm.com, kernel-team@android.com, Will Deacon , Mike Galbraith , Peter Collingbourne , Mark Rutland , Thomas Gleixner , Neeraj Upadhyay , Thiago Jung Bauermann , Mark Brown , Kristina Martsenko , Sebastian Andrzej Siewior , Petr Tesarik , Jinjie Ruan , Juri Lelli , Phil Auld Subject: Re: [PATCH 0/1] arm64: enable PREEMPT_LAZY Date: Tue, 29 Apr 2025 21:27:52 +0100 Message-Id: <174593068821.431779.9112946165910138990.b4-ty@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20250305104925.189198-1-vschneid@redhat.com> References: <20250305104925.189198-1-vschneid@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit On Wed, 05 Mar 2025 11:49:24 +0100, Valentin Schneider wrote: > Hey folks, > > This is a resubmission of Mark's patch [1]. I didn't end up changing anything > other than fluffing up the changelog. > > I ran this under an arm64 VM, added some trace_printk's and checked that > sched_switch's between runnable hackbench threads would occurr in the right > conditions: > o with TIF_NEED_RESCHED_LAZY set > o at the tick > o at do_notify_resume() > o with TIF_NEED_RESCHED set > > [...] Applied to arm64 (for-next/entry), thanks! [1/1] arm64: enable PREEMPT_LAZY https://git.kernel.org/arm64/c/c8597e2dd8b6 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev