From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gcj0F-0006Ch-Lv for kexec@lists.infradead.org; Fri, 28 Dec 2018 03:40:05 +0000 Date: Fri, 28 Dec 2018 11:39:40 +0800 From: Baoquan He Subject: Re: [PATCHv3 0/2] mm/memblock: reuse memblock bottom-up allocation style Message-ID: <20181228033940.GB1990@MiWiFi-R3L-srv> References: <1545966002-3075-1-git-send-email-kernelfans@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1545966002-3075-1-git-send-email-kernelfans@gmail.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" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Pingfan Liu Cc: Michal Hocko , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Mathieu Malaterre , kexec@lists.infradead.org, Daniel Vacek , Jonathan Corbet , "Rafael J. Wysocki" , Pavel Tatashin , Nicholas Piggin , Tang Chen , linux-acpi@vger.kernel.org, Mike Rapoport , yinghai@kernel.org, Stefan Agner , Yaowei Bai , Andrew Morton , Dave Young , Naoya Horiguchi , vgoyal@redhat.com, Len Brown On 12/28/18 at 11:00am, Pingfan Liu wrote: > The bottom-up allocation style is introduced to cope with movable_node, > where the limit inferior of allocation starts from kernel's end, due to > lack of knowledge of memory hotplug info at this early time. > Beside this original aim, 'kexec -c' prefers to reuse this style to alloc mem Wondering what is 'kexec -c'. > at lower address, since if the reserved region is beyond 4G, then it requires > extra mem (default is 16M) for swiotlb. But at this time hotplug info has been The default is 256M, not sure if we are talking about the same thing. low_size = max(swiotlb_size_or_default() + (8UL << 20), 256UL << 20); > got, the limit inferior can be extend to 0, which is done by this series > > Cc: Tang Chen > Cc: "Rafael J. Wysocki" > Cc: Len Brown > Cc: Andrew Morton > Cc: Mike Rapoport > Cc: Michal Hocko > Cc: Jonathan Corbet > Cc: Yaowei Bai > Cc: Pavel Tatashin > Cc: Nicholas Piggin > Cc: Naoya Horiguchi > Cc: Daniel Vacek > Cc: Mathieu Malaterre > Cc: Stefan Agner > Cc: Dave Young > Cc: Baoquan He > Cc: yinghai@kernel.org, > Cc: vgoyal@redhat.com > Cc: linux-kernel@vger.kernel.org > > Pingfan Liu (2): > mm/memblock: extend the limit inferior of bottom-up after parsing > hotplug attr > x86/kdump: bugfix, make the behavior of crashkernel=X consistent with > kaslr > > arch/x86/kernel/setup.c | 9 +++++--- > drivers/acpi/numa.c | 4 ++++ > include/linux/memblock.h | 1 + > mm/memblock.c | 58 +++++++++++++++++++++++++++++------------------- > 4 files changed, 46 insertions(+), 26 deletions(-) > > -- > 2.7.4 > _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec