From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E58BEB64D7 for ; Fri, 16 Jun 2023 12:37:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345101AbjFPMhO (ORCPT ); Fri, 16 Jun 2023 08:37:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344783AbjFPMhL (ORCPT ); Fri, 16 Jun 2023 08:37:11 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DACF030ED for ; Fri, 16 Jun 2023 05:37:09 -0700 (PDT) Date: Fri, 16 Jun 2023 14:37:04 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1686919027; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8OtrdfBcjyOOddFpGarokVYXJ6xauAxchjGuvxmZWCY=; b=OTtnIn475Dbyi1Dr+PJkdeI/m43b55pQBX/RA1Y3l1qpIukjl/8710tgbPmebJnDQH3ODi ByR6nz0yqJpLgGJOKuamGQPZaOysbh0Fo02GPOOmCA7WvKtXyZYCwBbYXjMyHZ5votLhoU j4/8SB9O+64QFd8Zn49PtK/N7+XEgI9OIqwsgLXcHZ39fJkFU8Gn7GmI8cMIl8gadLKb7I K0a/g+tj+H26JHuW9xsvclkJ4SuNCovug7sAWNXAa/6BGJ+gpMRGUm76gdWdUxrOKWDGmz +7OQdw65moT9twELsLLzgZHS/qeeetkcEAnbCb9NmWSrIoOmQ6U5DsaKdLpZCQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1686919027; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8OtrdfBcjyOOddFpGarokVYXJ6xauAxchjGuvxmZWCY=; b=/VCzuUGMvGYPHo1m7t2IRhjSV67rJKWyc569G3hrCedu5TFbi1Nk8NKmRcXkoTe87LF49n cxOpLB0o5fMTd1Bw== From: Sebastian Andrzej Siewior To: Peter Zijlstra Cc: linux-kernel@vger.kernel.org, Ben Segall , Boqun Feng , Crystal Wood , Daniel Bristot de Oliveira , Dietmar Eggemann , Ingo Molnar , John Stultz , Juri Lelli , Mel Gorman , Steven Rostedt , Thomas Gleixner , Valentin Schneider , Vincent Guittot , Waiman Long , Will Deacon Subject: Re: [PATCH v2 1/4] sched/core: Provide sched_rtmutex() and expose sched work helpers Message-ID: <20230616123704.lXQeCRiJ@linutronix.de> References: <20230427111937.2745231-1-bigeasy@linutronix.de> <20230427111937.2745231-2-bigeasy@linutronix.de> <20230503132051.GB1676736@hirez.programming.kicks-ass.net> <20230510150415.6BXNs0I1@linutronix.de> <20230511134308.GV4253@hirez.programming.kicks-ass.net> <20230525152505.obklNijZ@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <20230525152505.obklNijZ@linutronix.de> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2023-05-25 17:25:07 [+0200], To Peter Zijlstra wrote: > > if that works out this worry goes away. > >=20 > > If we get PROVE_RAW_LOCK_NESTING usable, something like the below might > > help out with the validation part... >=20 > Okay. So if I don't collide with workqueue do you buy this or do you > ask for something else. I'm not sure=E2=80=A6 >=20 > Regarding PROVE_RAW_LOCK_NESTING: If I boot -rc3 with `quiet' then I > don't see any complains. > Otherwise it is printk during boot (caller is holding raw_spinlock_t and > then printk() calls to serial driver with spinlock_t). > From time to time ppl send "fixes" for PROVE_RAW_LOCK_NESTING splats so > I would guess they boot with `quiet' and there isn't much else. So we > are getting close here I guess. >=20 > Do you want me to test the suggested validation map somewhere? Because > if it works, it could be queued. Do you want just the validation map or is there something I'm missing? Sebastian