From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f201.google.com (mail-dy1-f201.google.com [74.125.82.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C83F231836 for ; Fri, 10 Apr 2026 23:55:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775865315; cv=none; b=e8d9NIItdWv1u1ebq5sXLJITQSwh0E/JjbOPcNJHl5F/imKsULzaHRP7MH5/uRwpJ9lnjQD0FkWRo1Drdqof4EUS6NvkEOIMiJkOP5V6uncgpHDNNFRHoJyt28cpi8oWQwyaT0zDdYM918qOCVZFmADV1H32KsMLETRgy+N5n64= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775865315; c=relaxed/simple; bh=/SpgJSi3FfahSnpM6wP+zDTbB2l+guFWU+fHrSbRUQw=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=aXNiGTrSvqkObsZjWAhMEpN4GnlFFmGIndifBbxks5aPqbvjiO2FM1xE8cmgm3RyvBpEJJlGwUeGoBznB4eXB+q3rPzTw2+TUk58lNXRsE9CtBA/PEriXFpMd3197jezSeI/pobEgWVhtW8thGo80Z8kaWrQkfd/YZirgoSqDs4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--aniketgattani.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=kqQ/2dE1; arc=none smtp.client-ip=74.125.82.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--aniketgattani.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="kqQ/2dE1" Received: by mail-dy1-f201.google.com with SMTP id 5a478bee46e88-2d70f60aff7so756176eec.0 for ; Fri, 10 Apr 2026 16:55:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1775865313; x=1776470113; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=IwiafJTgqkn1jL5W+x+zRyEtdA1uK1gYi7Sp5O2iBaU=; b=kqQ/2dE1iU2W8AietZpq2xWOkMYYjWNMQTAGYM9PWFqVwCghvt0sde8iS5hEgxiA0D jYmmm5SNQgIm22GEbNU/TbVLNcaFmaXFLgf8JX1blaCeSd/TNH45xeuDvTchDf1zs3xM GlHVID2cuyVixjME0V3zk9KRaBdmNeqkcE7BQKkDXk8CXrGRF2FlMDH3ysEYHI3rTyrY eUe23ClVihnbEQ/zGWrfjsQ4VMUK/3OgbjuUtLcYtjhy8bvSipBM+T6626EbpQV+BlcN VSls/R7NKMRoL3T8BIB9T8HDFfdyumJyyO7kLNjs85qtuJzRWnS9ese9TjcBuAtvXN6a YCmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775865313; x=1776470113; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=IwiafJTgqkn1jL5W+x+zRyEtdA1uK1gYi7Sp5O2iBaU=; b=f0ZNBssaejI7dLSX4MzV4DpNe4seLpwKYRezg8v7JVRHgInIjgGpwN2wDWl3fDQ8Ny t/tt2skgOCa97pDTG5JdS495G7Tfq+N0duFw+q59bC9k7ANRz9tSB8BCFWkubmxKbjlV vnNBtxEf3+FbRh7B5O9ARyYo/rapN1ETL0tsCpSAzO+ET2zqPKlEyOKVooBTnpQHZIRO HHEaBD+rFdFk/j9mVK/tSUI+ur3SkTkIuMFaIdVPJ6fR5pBKW1uK5MOkA9nm3/ZURDGT 7jT42kTqT7Va2g+LskosZUiuh0B3eJ1m/2TI43Nal9PGfdOYDvAYPpXzVn9lBgZAMsRv FsFg== X-Forwarded-Encrypted: i=1; AJvYcCV3ON8EpQPSywy+IQSBz3o5aV3uYRhkcv1z3iSEtaYSFzmgw1nAKqrD3/WsYytLEkGJ58t5vTKZOHbxq90=@vger.kernel.org X-Gm-Message-State: AOJu0Yw6tqWyYpsxBLmO+fajyT3NjRpuGEMM3IvNQtZghzZjanlq11VQ rEYGfP2YBN6cPJI96cNRj9lCyxss8eSel+hBu5WFs+dHfpEytUW2DMNcXRMi8a84IIgVF9+tHWf jGeKzqDI94GynDe1nUfnZIaZRfeMyPMg92Q== X-Received: from dykp42.prod.google.com ([2002:a05:7300:caa:b0:2cb:a16b:ff43]) (user=aniketgattani job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:7495:b0:2ca:e4f2:31ff with SMTP id 5a478bee46e88-2d5873adf3emr3646512eec.6.1775865312896; Fri, 10 Apr 2026 16:55:12 -0700 (PDT) Date: Fri, 10 Apr 2026 23:55:11 +0000 In-Reply-To: <20260410125655.GB3102624@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260410125655.GB3102624@noisy.programming.kicks-ass.net> X-Mailer: git-send-email 2.54.0.rc0.605.g598a273b03-goog Message-ID: <20260410235511.2989255-1-aniketgattani@google.com> Subject: Re: [PATCH 1/2] sched/membarrier: Use per-CPU mutexes for targeted commands From: Aniket Gattani To: peterz@infradead.org Cc: aniketgattani@google.com, bsegall@google.com, joshdon@google.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, mathieu.desnoyers@efficios.com, mingo@redhat.com, paulmck@kernel.org Content-Type: text/plain; charset="UTF-8" On Fri, 10 Apr 2026 14:56:55 +0200, Peter Zijlstra wrote: > On Thu, Apr 09, 2026 at 09:22:22PM +0000, Aniket Gattani wrote: > > + if (cpu_id >= 0 && (cpu_id >= nr_cpu_ids || !cpu_possible(cpu_id))) > > + return 0; > > Did that want to be: > > if ((unsigned)cpu_id >= nr_cpu_ids || !cpu_possible(cpu_id)) > > ? Thanks for the review. Agreed. I will fix this in v2 and will wait a couple of business days for anyone else to respond.