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 9EC501DF254 for ; Wed, 29 Jan 2025 16:47:24 +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=1738169244; cv=none; b=Nb2vF8qxm/h8U82+0ZBmw1Xw3zJ6ulzaKXF0slyTsDlNWWHJLWXnD+yTizLlkO4Y1wA+rsBw4Q4LzoC9C+QVaxoW7hhQJgOyvX21D31R9vLaLOhTAdItht8buERHYKeBM4l2JYt5u9Fs9TZEZlZ3aFSZV6NGJJjx1hkL2wdHGCA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738169244; c=relaxed/simple; bh=9toNwxstXNg73OIaCrphY6RXecNJsqaZF9tKg1sUURM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Yhi7jyqUVQCLIHkJk24E4Q6thBmBLfW5L84SETMySRE1hpJbfpB0RmLHznGyU7TT6OcLaguORbKx73njMWGL6UzP9y75SoyjkoQVccPFcLANCo5RMltlsEoa8/ry1pOhC3pLMZUsb+vQQeiM/8383OgOzr+qYHDILJlmQdypOdo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mHC8ySmy; 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="mHC8ySmy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8B3A9C4CED1; Wed, 29 Jan 2025 16:47:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738169244; bh=9toNwxstXNg73OIaCrphY6RXecNJsqaZF9tKg1sUURM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mHC8ySmy++TFEycDALaD0Mqh6NBLt4VuyHpzzubr8Fq52ESdNGa+jvMyecHrNi8Ss GyUHHnpTI0qnbEkR4doOFOAUpY9IEJCHX0f+KunUNKe8IKSYw6sZvWDHwNaOym0U9O QBzjg/arSCxo0dcrkGPRrAaMPOK3dxjeBU60OCxa/ZQFSXtuaSvVAZaqeOOMeFN2D0 s8sQh0MfAPOz56m+/+eBhiPPOHaZ+JHrdf0Iqb9NIb1KGMQZYrVVKo2Fh9eXTtD95Y RVuApgJSV2/39Gf1K0brhVTh4bdSCNMUtJuBTuHH6rFHN15N19VG7P7t/5VbT9Jo4w iX2EzdO39pBBw== From: Sasha Levin To: stable@vger.kernel.org Cc: Florian Bezdeka , Sasha Levin Subject: Re: [PATCH 6.1] softirq: Allow raising SCHED_SOFTIRQ from SMP-call-function on RT kernel Date: Wed, 29 Jan 2025 11:47:22 -0500 Message-Id: <20250129113903-c29608a883c75428@stable.kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250129153226.818485-1-florian.bezdeka@siemens.com> References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit [ Sasha's backport helper bot ] Hi, The upstream commit SHA1 provided is correct: 6675ce20046d149e1e1ffe7e9577947dee17aad5 WARNING: Author mismatch between patch and upstream commit: Backport author: Florian Bezdeka Commit author: K Prateek Nayak Status in newer kernel trees: 6.13.y | Branch not found 6.12.y | Present (different SHA1: 6aeef0214de7) 6.6.y | Present (different SHA1: 3dd65ffa2df6) 6.1.y | Not found Note: The patch differs from the upstream commit: --- 1: 6675ce20046d1 ! 1: c2bdd4c44f80e softirq: Allow raising SCHED_SOFTIRQ from SMP-call-function on RT kernel @@ Metadata ## Commit message ## softirq: Allow raising SCHED_SOFTIRQ from SMP-call-function on RT kernel + commit 6675ce20046d149e1e1ffe7e9577947dee17aad5 upstream. + do_softirq_post_smp_call_flush() on PREEMPT_RT kernels carries a WARN_ON_ONCE() for any SOFTIRQ being raised from an SMP-call-function. Since do_softirq_post_smp_call_flush() is called with preempt disabled, @@ Commit message Signed-off-by: K Prateek Nayak Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20241119054432.6405-2-kprateek.nayak@amd.com + Tested-by: Felix Moessbauer + Signed-off-by: Florian Bezdeka ## kernel/softirq.c ## @@ kernel/softirq.c: static inline void invoke_softirq(void) --- Results of testing on various branches: | Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.1.y | Success | Success |