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 9DB3EC04FE0 for ; Wed, 16 Aug 2023 10:19:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243838AbjHPKTN (ORCPT ); Wed, 16 Aug 2023 06:19:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60778 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243894AbjHPKTH (ORCPT ); Wed, 16 Aug 2023 06:19:07 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1F6271999 for ; Wed, 16 Aug 2023 03:19:06 -0700 (PDT) Date: Wed, 16 Aug 2023 12:19:02 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1692181144; 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: in-reply-to:in-reply-to:references:references; bh=nKq4Lj7bJy5C6Mfz80GTTkN4qCbI70YzBo06GeXrdAI=; b=pktBrazY0mrvtjUxgd1bbmPm7duZ7pLScaR2aZXsMFhWHJSETwUR2EYhp+uhda2OZq1Y6b 2bY58wAsBhR65jdKqCq8bVA8PYVGIW9NnFiPI6PIvquEG1IY7qGhzD81x2sziiwH7BwWZG z/LQFCTmdGYx8naWL2sjLLa6v/odICBtlpRnqXttH+PrEIK0h1cPC7bLr6Ts4do6MZF+dj oxJ5LbZwm1XLz/4wYzsqsmgSLsbM6SGFPrVdPIJVfrq7K6U/l+QC4Gk/cMdbX095OKRb5d pHNuHAxayH0cUBfkm+PzMKc+4E3MxyDaQWGvNJBfXBl+LbLCuH4ld/VirjUU9A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1692181144; 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: in-reply-to:in-reply-to:references:references; bh=nKq4Lj7bJy5C6Mfz80GTTkN4qCbI70YzBo06GeXrdAI=; b=N9iYgOkkZVnc/eql+GY+J+2yxGpIlYd6VIKcQ+v5rhJUaJ90z57apQn62GFnFrb99WS7wk BA/QqCJuVeBbmxCg== From: Sebastian Andrzej Siewior To: Peter Zijlstra Cc: tglx@linutronix.de, linux-kernel@vger.kernel.org, bsegall@google.com, boqun.feng@gmail.com, swood@redhat.com, bristot@redhat.com, dietmar.eggemann@arm.com, mingo@redhat.com, jstultz@google.com, juri.lelli@redhat.com, mgorman@suse.de, rostedt@goodmis.org, vschneid@redhat.com, vincent.guittot@linaro.org, longman@redhat.com, will@kernel.org Subject: Re: [PATCH 0/6] locking/rtmutex: Avoid PI state recursion through sched_submit_work() Message-ID: <20230816101902.Pz8wdats@linutronix.de> References: <20230815110121.117752409@infradead.org> <20230815161557.GK214207@hirez.programming.kicks-ass.net> <20230816085826.zfXjhNmj@linutronix.de> <20230816094257.GE980931@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230816094257.GE980931@hirez.programming.kicks-ass.net> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2023-08-16 11:42:57 [+0200], Peter Zijlstra wrote: > Not the same -- this is namespace_lock(), right? That's a regular rwsem > afaict and that *should* be good. Clearly I messed something up. Most likely. I do see it also fom inode_lock() which does down_write(). I see it only to originate from rwbase_write_lock(). > Thanks! Sebastian