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 D591E264A7B for ; Thu, 13 Mar 2025 09:08:45 +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=1741856925; cv=none; b=IFFZ6KjMOt+kQ4MSWCCvUrpBb7dBRxA/M4MVtR1OKlubhHDlIx6C3EF+sCTNcJmC9nfgShughxf+oElm5EyFakchXgZ92O2IdklxMDgJ6f+cSTmgbRb2bPDMAzvvpBTjqDYOYdqmeAHYUSahaJEk4AB2vRhzWg21o2RGLOBxpe4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741856925; c=relaxed/simple; bh=NRFBjR41wQOjkdyTP9fpuFfOQcI5Bw4NDqre8KU5IN8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=YJaVw2HiR/gha5uaOqLtqC5+/6YqnjbkFGlF9z/AXm7RMZruvT8321gg1WVaZaThG+yMJtWmLHsQ3UTBsNC4HugZpUlgQWeoCalU1qukUDyeIci+cALiBXuRw6N96Zw4Tv62aWQKts9jRngI8c8dNg3K7qzL8lC85qvotIYa4fQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=g/hHWkYs; 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="g/hHWkYs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44D4AC4CEDD; Thu, 13 Mar 2025 09:08:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741856925; bh=NRFBjR41wQOjkdyTP9fpuFfOQcI5Bw4NDqre8KU5IN8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g/hHWkYsE8UamYtZ8Zh4AySi1F7gEVOlIgCOEV4lyYwezsqolGHjzcAhFb7F2tbKT tHy3MQSQs/GV3IODtriyaULaacjqpf5ITxpWxmX7NNA2QegmiWBxtgj4V70Ua+sn+Q 19FPrQgylv0sSNPTCytVPALu1JhTLbVzEscU8J1s1VLJW6VmuxJiebzTp0bQySpoL3 J8mUkR2zrqZ894pl9b0TEBTKbiywi8tmaUbqsB8SGSLSw0oc0BOyrnG9qtqKYAMrih DWQRNEYfsykowYvm+5KUUFN52n5kMg7IkIjRWfoVWuLqG554UejpUWaCnIpBRLajwb AP7QIh+WgPZxQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Felix Moessbauer , Sasha Levin Subject: Re: [PATCH 6.6.y 1/1] hrtimer: Use and report correct timerslack values for realtime tasks Date: Thu, 13 Mar 2025 05:08:43 -0400 Message-Id: <20250312233302-2946e29efda0cecc@stable.kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250311134931.290856-1-felix.moessbauer@siemens.com> References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [ Sasha's backport helper bot ] Hi, ✅ All tests passed successfully. No issues detected. No action required from the submitter. The upstream commit SHA1 provided is correct: ed4fb6d7ef68111bb539283561953e5c6e9a6e38 Status in newer kernel trees: 6.13.y | Present (exact SHA1) 6.12.y | Present (exact SHA1) Note: The patch differs from the upstream commit: --- 1: ed4fb6d7ef681 ! 1: 8ec8728ce513f hrtimer: Use and report correct timerslack values for realtime tasks @@ Metadata ## Commit message ## hrtimer: Use and report correct timerslack values for realtime tasks + commit ed4fb6d7ef68111bb539283561953e5c6e9a6e38 upstream. + The timerslack_ns setting is used to specify how much the hardware timers should be delayed, to potentially dispatch multiple timers in a single interrupt. This is a performance optimization. Timers of @@ fs/select.c: u64 select_estimate_accuracy(struct timespec64 *tv) } - ## kernel/sched/syscalls.c ## -@@ kernel/sched/syscalls.c: static void __setscheduler_params(struct task_struct *p, + ## kernel/sched/core.c ## +@@ kernel/sched/core.c: static void __setscheduler_params(struct task_struct *p, else if (fair_policy(policy)) p->static_prio = NICE_TO_PRIO(attr->sched_nice); --- Results of testing on various branches: | Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.6.y | Success | Success |