From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 406CD19ABC3; Tue, 25 Mar 2025 18:59:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742929159; cv=none; b=I3jHlZ+Ar+qC4RvCuhon3oQyHaqvCUPwL37waBag65Z608cqbKBhav5CNz8rep+a8UqZ3DU/msptVeCvFWnpRcOdQbXHBmtAG62B1jZIWSU34AJwn0Bmj7TT+0e4DmxzxT6wUNgw4PeX4EVoEo1+q30lhgbkWXeglDaryqBKb/o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742929159; c=relaxed/simple; bh=3SRmhjMkb1Jgd0rJ7w+EjGi3CoKrDexYIZbig8bkFhs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=E5icvYrow+NCA3905gfn+kRGwZB02/W2dikLmgcMEeR70BwGsLr+mr9eRHLdEUPVRtijEZywvUoTkw9G2iXRNhGex5smhONulrSr6B2usj8v4wKXj2+jpSNJEdnLdWsp257Ne4pnio6Dr3DpvFrG01L+As3l6MsNGhCcgy4CYrw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=pxiEXghC; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="pxiEXghC" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=2G/yfBn6d9OmLK3ab4K4caDrPZoiqKGqZEwV+WzWsD4=; b=pxiEXghCOLWIrHjgIKQ7tNb7aV VliuuKOH5C24u+FPO4cM5vbmR12RwPqoFUqVtlZvASScKMrgK5gUHAd1NQ1VSbdIhec2IB5el9QLY JydIlSghqaIOjU4PRD2obNUyw3sbGl0pQzoUawW2hvWSUKv56131U9h2v/E4Ry+ORmdflAdwKHqHX fSQ+LQhBztZWmGjohslak7cmNyscHwtHaCsyeOAUo1tmcr+8eRGAxarIKgkW1V+zEmCxoRTBPKdvR GBM/nqnq6BUiXDAV5+XSzOFkTqcTyr2YXTCWxLE1iGdk5EfQy9jAYxWAp3DvqueNo+wD+eiBOZXRo TTgUy0cg==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.98.1 #2 (Red Hat Linux)) id 1tx9UR-00000005gGp-3cEY; Tue, 25 Mar 2025 18:59:08 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 6DB363004AF; Tue, 25 Mar 2025 19:59:07 +0100 (CET) Date: Tue, 25 Mar 2025 19:59:07 +0100 From: Peter Zijlstra To: Pat Cody Cc: mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, linux-kernel@vger.kernel.org, riel@surriel.com, patcody@meta.com, kernel-team@meta.com, stable@vger.kernel.org Subject: Re: [PATCH] sched/fair: Add null pointer check to pick_next_entity() Message-ID: <20250325185907.GC31413@noisy.programming.kicks-ass.net> References: <20250320205310.779888-1-pat@patcody.io> <20250324115613.GD14944@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Mar 25, 2025 at 08:12:30AM -0700, Pat Cody wrote: > On Mon, Mar 24, 2025 at 12:56:13PM +0100, Peter Zijlstra wrote: > > Does something like: > > > > https://lkml.kernel.org/r/20250128143949.GD7145@noisy.programming.kicks-ass.net > > > > help? > > To clarify- are you asking about if we've tried reverting 4423af84b297? > We have not tried that yet. > > Or if we've included "sched/fair: Adhere to place_entity() constraints", > which we have already done- https://lore.kernel.org/all/20250207-tunneling-tested-koel-c59d33@leitao/ This; it seems it got lost. I'll try and get it queued up.