From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f71.google.com (mail-wm0-f71.google.com [74.125.82.71]) by kanga.kvack.org (Postfix) with ESMTP id 72B5A6B0038 for ; Wed, 30 Nov 2016 09:57:48 -0500 (EST) Received: by mail-wm0-f71.google.com with SMTP id w13so51441546wmw.0 for ; Wed, 30 Nov 2016 06:57:48 -0800 (PST) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id o145si7497213wme.156.2016.11.30.06.57.46 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 30 Nov 2016 06:57:47 -0800 (PST) Date: Wed, 30 Nov 2016 15:57:45 +0100 (CET) From: Jiri Kosina Subject: Re: mm, floppy: unkillable task faulting on fd0 In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Dmitry Vyukov Cc: LKML , Andrew Morton , "Kirill A. Shutemov" , "linux-mm@kvack.org" , syzkaller On Fri, 18 Nov 2016, Dmitry Vyukov wrote: > Hello, > > The following program produces unkillable tasks blocked at the following stack: I am pretty sure this got re-introduced by f2791e7eadf4, that basically reverts my attempt to work around you original report (that was fixed by 09954bad44). We'll have to figure out other way how to fix this that doesn't break odd userspace asumptions about semantics of O_NDELAY on floppies. -- Jiri Kosina SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org