Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754517AbaFNHZ4 (ORCPT ); Sat, 14 Jun 2014 03:25:56 -0400 Received: from e23smtp06.au.ibm.com ([202.81.31.148]:60333 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752071AbaFNHZw (ORCPT ); Sat, 14 Jun 2014 03:25:52 -0400 From: "Aneesh Kumar K.V" To: Joonsoo Kim , Andrew Morton , Marek Szyprowski , Michal Nazarewicz Cc: Minchan Kim , Russell King - ARM Linux , Greg Kroah-Hartman , Paolo Bonzini , Gleb Natapov , Alexander Graf , Benjamin Herrenschmidt , Paul Mackerras , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Joonsoo Kim Subject: Re: [PATCH v2 00/10] CMA: generalize CMA reserved area management code In-Reply-To: <1402543307-29800-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1402543307-29800-1-git-send-email-iamjoonsoo.kim@lge.com> User-Agent: Notmuch/0.18~rc0+2~gbc64cdc (http://notmuchmail.org) Emacs/24.3.91.1 (x86_64-unknown-linux-gnu) Date: Sat, 14 Jun 2014 12:55:39 +0530 Message-ID: <87r42seyvg.fsf@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14061407-7014-0000-0000-000005128380 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Joonsoo Kim writes: > Currently, there are two users on CMA functionality, one is the DMA > subsystem and the other is the kvm on powerpc. They have their own code > to manage CMA reserved area even if they looks really similar. > From my guess, it is caused by some needs on bitmap management. Kvm side > wants to maintain bitmap not for 1 page, but for more size. Eventually it > use bitmap where one bit represents 64 pages. > > When I implement CMA related patches, I should change those two places > to apply my change and it seem to be painful to me. I want to change > this situation and reduce future code management overhead through > this patch. > > This change could also help developer who want to use CMA in their > new feature development, since they can use CMA easily without > copying & pasting this reserved area management code. > > v2: > Although this patchset looks very different with v1, the end result, > that is, mm/cma.c is same with v1's one. So I carry Ack to patch 6-7. > > Patch 1-5 prepare some features to cover ppc kvm's requirements. > Patch 6-7 generalize CMA reserved area management code and change users > to use it. > Patch 8-10 clean-up minor things. I wanted to test the ppc changes and found that the patch series doesn't apply against v3.15 . Do you have a kernel tree which I can clone to test this series ? -- 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/