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 10896E573 for ; Tue, 30 Jul 2024 19:38:45 +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=1722368327; cv=none; b=uznXHr7Q/D9rMW6AQcOtIp94c16b1Nna3wjTrxOnrWjqC+HHMWpZSjfQDxwCfUS0264WabadzOnfUAlQRreUu/MAwsnuhWHsbgtr6vYatawQEl3yEFD+Mx7ZNb6V8bCvQZSXWsfr4M6UVGlpMvV9NUEVHgLrk/MkBGsZRp2DUsU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722368327; c=relaxed/simple; bh=rslhWtrvQ9mk+QWH55Eo3kU1eTDQX6P/vW/HHjoC1BY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=h40rC+oVpS7YFDVSrnoTn74Z6qtE6ScHL98c7s1NxYnFc5SWGn7uTuCktUbb7rcwQidreYu9YQGhlMr9ROxdTKoJzmFTXGWr8/v0s6ZYWTI9S6oX8XuJ5r1AmlLK4lWydsddoue+3DlX22x5p4FE7sUzo9zYJBHlyegPKmuy5Dc= 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=Kkih7tUL; 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="Kkih7tUL" 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=sYTBm2JyQE4Fqzv992X+FDRLe/C2+ewskX/9CEbqAns=; b=Kkih7tULFXS4IO8Pxbp7kpL6ms /vD6gzBtEnjtlpG57gFTBskjcMTurJw1wTAyQzZUs9lKaDZ7VAoPYxc6J/DSMcRL+OMoYA1vimpIS VIPwj7jPBFOcFpQjT3Mj1+AWeVodobmTzsPXKHEFNwvtzBzR6EMzZnYcIEQTKs4pXTZ0Di4ufSO/D PJfNuZS3lcS4b0HAV78AJhj1jFIQJzHRYrd29A0F8M0FmuiHQHhmJT4v4GKFPDCs9D1IgH58k5CQ/ cKa1cf69z5e3CKQKF/UV2LE1qk0cG98hl8m1tiNPCQjj84RZmso3YGKhJ3ytUiskrTbSdxdHBFwT8 cQB5b0nQ==; 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 1sYsgD-000000054jB-2Lgo; Tue, 30 Jul 2024 19:38:42 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 34B313003EA; Tue, 30 Jul 2024 21:38:41 +0200 (CEST) Date: Tue, 30 Jul 2024 21:38:41 +0200 From: Peter Zijlstra To: Jens Axboe Cc: Linus Torvalds , Guenter Roeck , Andy Lutomirski , Ingo Molnar , Peter Anvin , Linux Kernel Mailing List , the arch/x86 maintainers Subject: Re: Linux 6.11-rc1 Message-ID: <20240730193841.GS33588@noisy.programming.kicks-ass.net> References: <20240730192237.GR33588@noisy.programming.kicks-ass.net> <231e7a2e-7e2e-4b82-b084-8943b2236de0@kernel.dk> 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: <231e7a2e-7e2e-4b82-b084-8943b2236de0@kernel.dk> On Tue, Jul 30, 2024 at 01:31:18PM -0600, Jens Axboe wrote: > On 7/30/24 1:22 PM, Peter Zijlstra wrote: > > On Tue, Jul 30, 2024 at 11:53:31AM -0700, Linus Torvalds wrote: > > > >> Which makes me think it's asm_exc_int3 just recursively failing. > > > > Sounds like text_poke() going sideways, there's a jump_label fail out > > there: > > > > https://lkml.kernel.org/r/20240730132626.GV26599@noisy.programming.kicks-ass.net > > No change with this applied... > > Also not sure if you read my link, but a few things to note: > > - It only happens with gcc-11 here. I tried 12/13/14 and those > are fine, don't have anything older One of my test boxes has 4.4 4.6 4.8 4.9 5 6 8 9 10 11 12 13 (now I gotta go figure out wth 7 went :-) And yeah, we don't support most of those version anymore (phew). So if its easy to setup, I could try older GCCs. > - It only happens with KFENCE enabled. I missed the KFENCE bit. Happen to have the .config handy, I couldn't make much sense of Gunther's website in a hurry.