Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932771Ab0HNHIR (ORCPT ); Sat, 14 Aug 2010 03:08:17 -0400 Received: from web37602.mail.mud.yahoo.com ([209.191.87.85]:20557 "HELO web37602.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751946Ab0HNHIQ convert rfc822-to-8bit (ORCPT ); Sat, 14 Aug 2010 03:08:16 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=Ea4xcseqSMt/YtxARp6lue/zkLvYl50v/GGNsWCWHQsBFAM5Ck04sfpQYMZzlhTUj/F/NECBhzpPaSR2SMTpvGbioALiS1Re8GNngu87HJjeEWAtfuwd8LNQF5mMUTYNMxNNKktG3/2yqfKfyJOk/rCKA9/JUrnke8wS3rw7QiM=; Message-ID: <728075.56624.qm@web37602.mail.mud.yahoo.com> X-YMail-OSG: Lgkh.FcVM1n91V2iIp6GD_oeRCucltLYScVCAvecYWX.Txa 3ZoUGDyj4Cl2nqSv.WSK2f.3j9vFneHiQf4jquwxLdhvcViyhyuldquHLoNm .eDMjmbAt843atp4jtuf2oLby4SXGxjI3c..cTuSeuBWQz59mZ9tsRKPb8Us UIIetIlpiYVgGpnUwr2k5z4t5Gk0Ec_gKwJY5k6SoMTtmHend5nvQEoM3HYL jOlRZwvhmD0si_1eYS1_Hu8DL3rLxxIPTEXaRUahRcb1RMksc2cjEAWfYR.h QBdgneNiRu.iaxGTlRg-- X-Mailer: YahooMailClassic/11.3.2 YahooMailWebService/0.8.105.279950 Date: Sat, 14 Aug 2010 00:08:14 -0700 (PDT) From: Alex Dubov Subject: Re: [QUESTION] Need some explanations in regard to memory alignment of requests that a block device receives To: Maxim Levitsky Cc: linux-kernel In-Reply-To: <1281706071.4160.18.camel@maxim-laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 704 Lines: 22 > > However I am opting in to allow to receive requests that > have many > sectors span several memory regions, and be in highmem). > The request is converted to scatterlist upon which I > operate. > (Untill this point I did the same think Alex does in > mspro_blk.c) > If you'll look at what is actually there you'll see that neither of your questions poses a real problem. But, of course, block layer is more conservative, for what I can tell. -- 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/