Received: by 2002:ac0:a582:0:0:0:0:0 with SMTP id m2-v6csp4512429imm; Mon, 15 Oct 2018 16:36:08 -0700 (PDT) X-Google-Smtp-Source: ACcGV639ySbK7D22iztSBSwzPgDMbLJqo1d7ngXSi18BzNWuDIXzSQF3CAqQK4HQzRQilj7Y6m2K X-Received: by 2002:a62:507:: with SMTP id 7-v6mr19606746pff.80.1539646568789; Mon, 15 Oct 2018 16:36:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1539646568; cv=none; d=google.com; s=arc-20160816; b=yvKIqu9xDTvGsrDLrBUZYe45FpVNWMi3JYSfaZ1oFZXL7bEtHLQO7/OXOSWfjSjgQA 9DKSeWbiCqHN8wPTZ9r4+8tFRAk5ndCCvB9x1jhZ8vZKeZmH2r7jsIOkap5DOz1NUNmT Y6j+i6768IkuQ+2lDPsXujJeJLGsfWWB6etbvupR9FYvLdcfrgOjhRtGGstVb4LQUGTI Fet2k8f2erxzHZRECcymaKCUvZqcxiI3a5FQhPdDJHtM3FYLAUozZjot6WaO4tXuLRYL GVGM5MfwXPLTNljEIlge8JFwl4Srr8uOMf4Fo5DWYPmTGRc2NRS7kNT9QK+Z8wXK3AF7 +OLQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=juDYaK1F5dyRlTPzpZSSevb7asYGss+GC4TmYIWbOI8=; b=eQRP0pqyJDprcFeofKJbAptJxkULqRhWJVpoZ3/hflnJyhe3LjgAF+Diai18o+J8Uv Dzkwvk43xxRkoyMj1odLVxAJhzxFfLA2UbgTW/4Gh1FXvOXQwN+L0y6uZmf7yyZUdLye hHQSRyOHwI+ptlBiesOa1iXRGyMLLq4J4MKCxcCiteovY/mrBQHn/wwvYTrDNEtd5W3U 3zcOodgnPUAVpymWvZFWaFfIKwmssETMCchp3tJ04wb8JLnWplQaO1ropNoVpPqR/Fb+ uAhUbqfCAkUZkXfXJKlf06So2vlRrjsINl6fd1RP1wfZCQZjUWD/b9o8PlqBAwDBn+Wd +fnQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id w18-v6si12323569pfg.70.2018.10.15.16.35.51; Mon, 15 Oct 2018 16:36:08 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727105AbeJPHW7 (ORCPT + 99 others); Tue, 16 Oct 2018 03:22:59 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:46492 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726917AbeJPHW7 (ORCPT ); Tue, 16 Oct 2018 03:22:59 -0400 Received: from akpm3.svl.corp.google.com (unknown [104.133.8.65]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 6100227CD; Mon, 15 Oct 2018 23:35:30 +0000 (UTC) Date: Mon, 15 Oct 2018 16:35:29 -0700 From: Andrew Morton To: Peter Zijlstra Cc: Sebastian Andrzej Siewior , Dmitry Vyukov , Clark Williams , Alexander Potapenko , kasan-dev , Linux-MM , LKML , linux-rt-users@vger.kernel.org, Thomas Gleixner Subject: Re: [PATCH] mm/kasan: make quarantine_lock a raw_spinlock_t Message-Id: <20181015163529.30ed9b0ac18e20dd975f4253@linux-foundation.org> In-Reply-To: <20181013135058.GC4931@worktop.programming.kicks-ass.net> References: <20181005163320.zkacovxvlih6blpp@linutronix.de> <20181009142742.ikh7xv2dn5skjjbe@linutronix.de> <20181010092929.a5gd3fkkw6swco4c@linutronix.de> <20181010095343.6qxved3owi6yokoa@linutronix.de> <20181010214945.5owshc3mlrh74z4b@linutronix.de> <20181012165655.f067886428a394dc7fbae7af@linux-foundation.org> <20181013135058.GC4931@worktop.programming.kicks-ass.net> X-Mailer: Sylpheed 3.6.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 13 Oct 2018 15:50:58 +0200 Peter Zijlstra wrote: > The whole raw_spinlock_t is for RT, no other reason. Oh. I never realised that. Is this documented anywhere? Do there exist guidelines which tell non-rt developers and reviewers when it should be used?