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 775561EEE3 for ; Thu, 22 Aug 2024 15:48:22 +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=1724341704; cv=none; b=AJ+XwhroOJK2nzQfMmH3tg3hIBGdmD0N290+DzrAobfN4a1ehXQD7Vc+1efCNsTgp/zNxc5sCBiTTDZ5OrXomJD55u9MwjR4A7Gln006x9ieFh1cfXM2tDQzH4JJjeoPAharFB/pNLk/KBtCPthAnEprua/bXTHlyF8olMXkJVo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724341704; c=relaxed/simple; bh=s1EhVvaSO1gpIspbSHhTTtb5IH7FCC3bOxcpOGvXxd4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=DMKCHejPTUyI+u/xP9I6wFtg2VEvPQOKUyFM4MJ77jiJrv2Z7FKV6DQB077SjORVg84X+9zyCQUp2sclS8PFjefsamXFdEqcTbWMMxwsF5RRaFefjLv9eJPlrGhreAHz2ym1chtMcDagEKZG20HrqyCJW5zp18HwUwAdWu04xy4= 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=cvMHwKn8; 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="cvMHwKn8" 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=s1EhVvaSO1gpIspbSHhTTtb5IH7FCC3bOxcpOGvXxd4=; b=cvMHwKn89lTSVg5ozx28zkOtEj xxWOHeRJy/X8J3qWuI6UKX7lngVg6i5HwePTjTE1+cXaWEjokEtjDpjTJViuu+Tf1aCFMfXifPNDH ZZNxa/6o0GvdKA1UaKmNCPPL1R/RRWotY6HfWtYlp8Iug9q/HWIlqiDVuXA6YtJxgDfO74n2+eN+P NmXl46iVlG+RnLHkLnCPdgLbspv7RCW51o02Af1pM/olQIOjYgNPTqHMXc8J1gJqBs5fk46OvNjJv mUP2TKmHiPJY0b05P72BBhpe6rRT8nT/V2BolCc9z/nVlo5VgrTe9g3p/gNPWsx9DQxWFi3vqeRM5 xF0JS/LA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1shA2h-00000009zPo-2oz4; Thu, 22 Aug 2024 15:48:08 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 4E401300642; Thu, 22 Aug 2024 17:48:07 +0200 (CEST) Date: Thu, 22 Aug 2024 17:48:07 +0200 From: Peter Zijlstra To: Joel Fernandes Cc: mingo@kernel.org, tj@kernel.org, void@manifault.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, "Joel Fernandes (Google)" Subject: Re: [PATCH 0/9] sched: Prepare for sched_ext Message-ID: <20240822154807.GA17097@noisy.programming.kicks-ass.net> References: <20240813222548.049744955@infradead.org> Precedence: bulk X-Mailing-List: linux-kernel@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 Wed, Aug 21, 2024 at 05:41:32PM -0400, Joel Fernandes wrote: > With sched/core , it boots fine with core scheduling disabled, but > when core scheduling is enabled I am getting hard hangs and > occasionally get to the login screen if I'm lucky. So there's > definitely something wonky in sched/core branch and core sched. > I could not get a trace or logs yet, since once it hangs I have to > hard power off. Uff, thanks for this (and the follow up), I'll try and figure out where core-sched went sideways.