From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f179.google.com (mail-pd0-f179.google.com [209.85.192.179]) by kanga.kvack.org (Postfix) with ESMTP id 17FE16B0095 for ; Mon, 18 May 2015 04:29:14 -0400 (EDT) Received: by pdfh10 with SMTP id h10so139924780pdf.3 for ; Mon, 18 May 2015 01:29:13 -0700 (PDT) Received: from szxga03-in.huawei.com (szxga03-in.huawei.com. [119.145.14.66]) by mx.google.com with ESMTPS id qj7si14855362pbc.234.2015.05.18.01.29.11 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 18 May 2015 01:29:13 -0700 (PDT) Message-ID: <5559A17B.90401@huawei.com> Date: Mon, 18 May 2015 16:23:23 +0800 From: Xishi Qiu MIME-Version: 1.0 Subject: Re: [RFC 0/3] Mirrored memory support for boot time allocations References: <55599BAA.20204@huawei.com> In-Reply-To: <55599BAA.20204@huawei.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Tony Luck Cc: Andrew Morton , linux-kernel@vger.kernel.org, Linux MM , Xiexiuqi Add linux-mm@kvack.org On 2015/5/18 15:58, Xishi Qiu wrote: > On 2015/2/7 5:54, Tony Luck wrote: > >> Platforms that support a mix of mirrored and regular memory are coming. >> >> We'd like to use the mirrored memory for kernel code, data and dynamically >> allocated data because our machine check recovery code cannot fix problems >> there. This series modifies the memblock allocator to comprehend mirrored >> memory and use it for all boot time allocations. Later I'll dig into page_alloc.c >> to put the leftover mirrored memory into a zone to be used for kernel allocation >> by slab/slob/slub and others. > > Hi Tony, > > Is it means that you will create a new zone to fill mirrored memory, like the > movable zone, right? > I think this will change a lot of code, why not create a new migrate type? > such as CMA, e.g. MIGRATE_MIRROR > > Thanks, > Xishi Qiu > >> >> You'll see why this is just RFC when you get to part 3. >> >> Tony Luck (3): >> mm/memblock: Add extra "flag" to memblock to allow selection of memory >> based on attribute >> mm/memblock: Allocate boot time data structures from mirrored memory >> x86, mirror: x86 enabling - find mirrored memory ranges and tell >> memblock >> >> arch/s390/kernel/crash_dump.c | 4 +- >> arch/sparc/mm/init_64.c | 4 +- >> arch/x86/kernel/check.c | 2 +- >> arch/x86/kernel/e820.c | 2 +- >> arch/x86/mm/init_32.c | 2 +- >> arch/x86/mm/memtest.c | 2 +- >> include/linux/memblock.h | 43 ++++++++++------ >> mm/cma.c | 4 +- >> mm/memblock.c | 113 ++++++++++++++++++++++++++++++++---------- >> mm/nobootmem.c | 12 ++++- >> 10 files changed, 135 insertions(+), 53 deletions(-) >> > > > > -- > 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/ > > . > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org