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[209.132.180.67]) by mx.google.com with ESMTP id p188si4081605pga.206.2018.04.17.03.35.10; Tue, 17 Apr 2018 03:35:24 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@messagingengine.com header.s=fm2 header.b=lL3pyeqm; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752651AbeDQKdx (ORCPT + 99 others); Tue, 17 Apr 2018 06:33:53 -0400 Received: from out3-smtp.messagingengine.com ([66.111.4.27]:43349 "EHLO out3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752096AbeDQKdu (ORCPT ); Tue, 17 Apr 2018 06:33:50 -0400 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailout.nyi.internal (Postfix) with ESMTP id C27582187E; Tue, 17 Apr 2018 06:33:49 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute6.internal (MEProxy); Tue, 17 Apr 2018 06:33:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-sender :x-me-sender:x-sasl-enc; s=fm2; bh=TBHt3FWPLc3w4NVgIOVZ1bjtohLIn jZBeniCW7OOoHk=; b=lL3pyeqmaJfTPhQ4hohlHNc1m2/EwzU/gyD8/xT/w8s3v N8gdsp+Ygd8zDbv42zncOP3a9MhSofmHPKtLOOAYUI+hhiXZuTRPjw/253jMpTTp vcHf9sHWBQb6maejBLkps/JyxDGgTGruhPZscvJUQ4TCO0TfBNm76dJu22Yfqe90 ZRTx0nNLwtOgYhjJ5sHDyOFaCzdCr1iVsCpmREI0gDnNT12rO7J1dR8mZ+1kytPd pe6XmEgc+JY/5CQJnDq6LKeNtA/8rvO0i2u2yIAts6phdalFzboXwEXdHxAFMioF lzWFT+lfct42/X0pEjcUf6tTEjFVev6NzRHa024JQ== X-ME-Sender: Received: from localhost (unknown [46.44.180.42]) by mail.messagingengine.com (Postfix) with ESMTPA id 3E4D5102D9; Tue, 17 Apr 2018 06:33:49 -0400 (EDT) Date: Tue, 17 Apr 2018 12:33:44 +0200 From: Greg KH To: Dexuan Cui Cc: Jan Kara , Guillaume Morin , Haiyang Zhang , Pavlos Parissis , "stable@vger.kernel.org" , "jack@suse.com" , "linux-fsdevel@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "mszeredi@redhat.com" Subject: Re: kernel panics with 4.14.X versions Message-ID: <20180417103344.GB8445@kroah.com> References: <20180416132550.d25jtdntdvpy55l3@bender.morinfr.org> <20180416144041.t2mt7ugzwqr56ka3@quack2.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 16, 2018 at 09:10:35PM +0000, Dexuan Cui wrote: > > From: Jan Kara > > Sent: Monday, April 16, 2018 07:41 > > ... > > How easily can you hit this? Are you able to run debug kernels / inspect > > crash dumps when the issue occurs? Also testing with the latest mainline > > kernel (4.16) would be welcome whether this isn't just an issue with the > > backport of fsnotify fixes from Miklos. > > It's not easy for us to reproduce the fsnotify() lockup issue, and actually > we still don't have an easy & reliable way to reproduce it. > > According to our tests, v4.16 doesn't have the issue. > And v4.15 doesn't have the issue either, if I recall correctly. > I only know the issue happens to v4.14.x and 4.13.x kernels Any chance to run 'git bisect' between 4.14 and 4.15 to find the fix? thanks, greg k-h