From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from terminus.zytor.com ([2001:1868:205::10] helo=mail.zytor.com) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1U01xY-0006fL-LK for kexec@lists.infradead.org; Tue, 29 Jan 2013 03:34:09 +0000 In-Reply-To: References: <1358868049-19884-1-git-send-email-trenn@suse.de> <6950516.1uefDuthAH@hammer82.arch.suse.de> <510721C6.6080705@zytor.com> <51072FEF.50000@zytor.com> <4302d59f-5c87-4b82-af16-9f54625fc9ce@email.android.com> MIME-Version: 1.0 Subject: Re: [PATCH 2/2] x86 e820: Introduce memmap=resetusablemap for kdump usage From: "H. Peter Anvin" Date: Mon, 28 Jan 2013 19:33:52 -0800 Message-ID: <5ea70988-10fb-4153-9482-75507efe0b07@email.android.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Yinghai Lu Cc: x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, horms@verge.net.au, Thomas Renninger , vgoyal@redhat.com I guess that very limited use might make sense. Yinghai Lu wrote: >On Mon, Jan 28, 2013 at 6:27 PM, H. Peter Anvin wrote: >> To be more clear: the max_pfn stuff seems like a relic of the past, >and I am wondering what it would take to get rid of it. >> >> It clearly has the wrong semantics, except perhaps in the most >trivial allocator models. >> >one thing i think could be : use that decide if we need iommu/swiotlb. >like in >arch/x86/kernel/amd_gart_64.c >arch/x86/kernel/pci-swiotlb.c >drivers/iommu/amd_iommu.c >... > >Yinghai -- Sent from my mobile phone. Please excuse brevity and lack of formatting. _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec