From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id E666C6B004D for ; Mon, 8 Jun 2009 04:32:22 -0400 (EDT) In-reply-to: <20090606080334.GA15204@ZenIV.linux.org.uk> (message from Al Viro on Sat, 6 Jun 2009 09:03:34 +0100) Subject: Re: [PATCH 0/23] File descriptor hot-unplug support v2 References: <20090606080334.GA15204@ZenIV.linux.org.uk> Message-Id: From: Miklos Szeredi Date: Mon, 08 Jun 2009 11:41:19 +0200 Sender: owner-linux-mm@kvack.org To: viro@ZenIV.linux.org.uk Cc: 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, torvalds@linux-foundation.org, alan@lxorguk.ukuu.org.uk, gregkh@suse.de, npiggin@suse.de, akpm@linux-foundation.org, hch@infradead.org List-ID: On Sat, 6 Jun 2009, Al Viro wrote: > Frankly, I very much suspect that force-umount is another case like that; > we'll need a *lot* of interesting cooperation from fs for that to work and > to be useful. I'd be delighted to be proven incorrect on that one, so > if you have anything serious in that direction, please share the details. Umm, not sure why we'd need cooperation from the fs. Simply wait for the operation to exit the filesystem or driver. If it's a blocking operation, send a signal to interrupt it. Sure, filesystems and drivers have lots of state, but we don't need to care about that, just like we don't need to care about it for remounting read-only. Thanks, Miklos -- 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