From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by wx-out-0506.google.com with SMTP id h28so2106526wxd for ; Tue, 12 Sep 2006 16:58:06 -0700 (PDT) Message-ID: <5c49b0ed0609121658y6e96c4a7n46f1d68645f621b6@mail.gmail.com> Date: Tue, 12 Sep 2006 16:58:06 -0700 From: "Nate Diller" Subject: Re: [PATCH 00/20] vm deadlock avoidance for NFS, NBD and iSCSI (take 7) In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20060912143049.278065000@chello.nl> Sender: owner-linux-mm@kvack.org Return-Path: To: Linus Torvalds Cc: Peter Zijlstra , linux-mm@kvack.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Andrew Morton , David Miller , Rik van Riel , Daniel Phillips List-ID: On 9/12/06, Linus Torvalds wrote: > > > On Tue, 12 Sep 2006, Peter Zijlstra wrote: > > > > Linus, when I mentioned swap over network to you in Ottawa, you said it was > > a valid use case, that people actually do and want this. Can you agree with > > the approach taken in these patches? > > Well, in all honesty, I don't think I really said "valid", but that I said > that some crazy people want to do it, and that we should try to allow them > their foibles. > > So I'd be nervous to do any _guarantees_. I think that good VM policies > should make it be something that works in general (the dirty mapping > limits in particular), but I'd be a bit nervous about anybody taking it > _too_ seriously. Crazy people are still crazy, they just might be right > under certain reasonably-well-controlled circumstances. (oops, forgot to cc: the list) Personally, I'm a little unhappy with the added complexity here, I'm not convinced that this extra feature is worth it. In particular, adding to the address_space_operations, the block_device_operations, and creating a new swap index/offset interface just for this seems questionable. I feel like interface bloat should be reserved for features that have widespread use and benefit. Not that I'm opposed to this feature, just that I think this patch is too invasive interface-wise. NATE -- 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