Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753256AbZFHSE2 (ORCPT ); Mon, 8 Jun 2009 14:04:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750924AbZFHSET (ORCPT ); Mon, 8 Jun 2009 14:04:19 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:41341 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750725AbZFHSES (ORCPT ); Mon, 8 Jun 2009 14:04:18 -0400 Date: Mon, 8 Jun 2009 11:01:51 -0700 (PDT) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: Al Viro cc: Miklos Szeredi , ebiederm@xmission.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, hugh@veritas.com, tj@kernel.org, adobriyan@gmail.com, alan@lxorguk.ukuu.org.uk, gregkh@suse.de, npiggin@suse.de, akpm@linux-foundation.org, hch@infradead.org Subject: Re: [PATCH 0/23] File descriptor hot-unplug support v2 In-Reply-To: <20090608175018.GM8633@ZenIV.linux.org.uk> Message-ID: References: <20090606080334.GA15204@ZenIV.linux.org.uk> <20090608162913.GL8633@ZenIV.linux.org.uk> <20090608175018.GM8633@ZenIV.linux.org.uk> User-Agent: Alpine 2.01 (LFD 1184 2008-12-16) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 793 Lines: 25 On Mon, 8 Jun 2009, Al Viro wrote: > > Welcome to reality... > > * bread() is non-interruptible > * so's copy_from_user()/copy_to_user() > * IO we are stuck upon _might_ be interruptible, but by sending a signal > to some other process We can probably improve on these, though. Like the copy_to/from_user thing. We might well be able to do that whole "if it's a fatal signal, return early" thing. So in the _general_ case - no, we probably can't fix things. But we could likely at least improve in some common cases if we cared. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/