Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751611AbXALE6m (ORCPT ); Thu, 11 Jan 2007 23:58:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751612AbXALE6m (ORCPT ); Thu, 11 Jan 2007 23:58:42 -0500 Received: from smtp106.mail.mud.yahoo.com ([209.191.85.216]:20211 "HELO smtp106.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751606AbXALE6m (ORCPT ); Thu, 11 Jan 2007 23:58:42 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:X-YMail-OSG:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=bZdgNeLsZ4opW/uMi7Xep+uSWjYbLdJKBExLCFQMigm+GHX0ie20pHWWf4/ikhOd0Rq1dCCxZ/w/lCiVFpmHGjtYeFfLAcFaARCxhNpS688YHYW/LVpQxVNjJjOkWS8zrLSwDSFE1YJJYQLOC9AdD9OxnD4l2jF3Sf0bCjog30Q= ; X-YMail-OSG: FetTwQ8VM1lzKaZO4Cpe0r.yweazoIdck3zkTesQe4CEgvwgbhulMpmGJo_YB6N.07YHObn6cXMlnjNhjxxVsX4j7FaMpzg0YTzGGBN0H8Hxg5w3mlT_nQIfFiv2QJgpZBCr090Q_Xztnn8- Message-ID: <45A71565.2030908@yahoo.com.au> Date: Fri, 12 Jan 2007 15:58:13 +1100 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051007 Debian/1.7.12-1 X-Accept-Language: en MIME-Version: 1.0 To: Nick Piggin CC: Linus Torvalds , Bill Davidsen , Andrew Morton , Hua Zhong , Hugh Dickins , linux-kernel@vger.kernel.org, hch@infradead.org, kenneth.w.chen@intel.com, mjt@tls.msk.ru Subject: Re: O_DIRECT question References: <6d6a94c50701101857v2af1e097xde69e592135e54ae@mail.gmail.com> <6d6a94c50701102150w4c3b46d0w6981267e2b873d37@mail.gmail.com> <20070110220603.f3685385.akpm@osdl.org> <6d6a94c50701102245g6afe6aacxfcb2136baee5cbfa@mail.gmail.com> <20070110225720.7a46e702.akpm@osdl.org> <45A5E1B2.2050908@yahoo.com.au> <6d6a94c50701102354l7ab41a3bp4761566204f1d992@mail.gmail.com> <45A5F157.9030001@yahoo.com.au> <45A6F70E.1050902@tmr.com> <45A70EF9.40408@yahoo.com.au> <45A714F8.6020600@yahoo.com.au> In-Reply-To: <45A714F8.6020600@yahoo.com.au> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1149 Lines: 28 Nick Piggin wrote: > Linus Torvalds wrote: >> Very basic issue: the perfect is the enemy of the good. Claiming that >> there is a "proper solution" is usually a total red herring. Quite >> often there isn't, and the "paper over" is actually not papering over, >> it's quite possibly the best solution there is. > > > Yeah *smallish* higher order allocations are fine, and we use them all the > time for things like stacks or networking. > > But Aubrey (who somehow got removed from the cc list) wants to do order 9 > allocations from userspace in his nommu environment. I'm just trying to be > realistic when I say that this isn't going to be robust and a userspace > solution is needed. Oh, and also: I don't disagree with that limiting pagecache to some % might be useful for other reasons. -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com - 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/