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Re: [Xen-devel] [PATCH RFCv2 2/4] mm/memory_hotplug: Replace "bool want_memblock" by "int type"
- To: Wei Yang <richard.weiyang@xxxxxxxxx>
- From: David Hildenbrand <david@xxxxxxxxxx>
- Date: Mon, 3 Dec 2018 11:33:12 +0100
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- Cc: Oscar Salvador <osalvador@xxxxxxxx>, Rich Felker <dalias@xxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Heiko Carstens <heiko.carstens@xxxxxxxxxx>, linux-mm@xxxxxxxxx, Michal Hocko <mhocko@xxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, "Rafael J. Wysocki" <rafael@xxxxxxxxxx>, linux-s390@xxxxxxxxxxxxxxx, Dave Jiang <dave.jiang@xxxxxxxxx>, Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, x86@xxxxxxxxxx, Matthew Wilcox <willy@xxxxxxxxxxxxx>, linux-acpi@xxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Rob Herring <robh@xxxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, "Jan H. Sch??nherr" <jschoenh@xxxxxxxxx>, Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>, Vasily Gorbik <gor@xxxxxxxxxxxxx>, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>, "mike.travis@xxxxxxx" <mike.travis@xxxxxxx>, Jonathan Neusch??fer <j.neuschaefer@xxxxxxx>, Nicholas Piggin <npiggin@xxxxxxxxx>, J??r??me Glisse <jglisse@xxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>, Arun KS <arunks@xxxxxxxxxxxxxx>, Christophe Leroy <christophe.leroy@xxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, Mathieu Malaterre <malat@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Logan Gunthorpe <logang@xxxxxxxxxxxx>, Mauricio Faria de Oliveira <mauricfo@xxxxxxxxxxxxxxxxxx>, Martin Schwidefsky <schwidefsky@xxxxxxxxxx>, devel@xxxxxxxxxxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
- Delivery-date: Mon, 03 Dec 2018 10:33:31 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 01.12.18 02:50, Wei Yang wrote:
> On Fri, Nov 30, 2018 at 06:59:20PM +0100, David Hildenbrand wrote:
>> Let's pass a memory block type instead. Pass "MEMORY_BLOCK_NONE" for device
>> memory and for now "MEMORY_BLOCK_UNSPECIFIED" for anything else. No
>> functional change.
>
> I would suggest to put more words to this.
Sure, makes sense, I'll add more details. Thanks!
>
> "
> Function arch_add_memory()'s last parameter *want_memblock* is used to
> determin whether it is necessary to create a corresponding memory block
> device. After introducing the memory block type, this patch replaces the
> bool type *want_memblock* with memory block type with following rules
> for now:
>
> * Pass "MEMORY_BLOCK_NONE" for device memory
> * Pass "MEMORY_BLOCK_UNSPECIFIED" for anything else
>
> Since this parameter is passed deep to __add_section(), all its
> descendents are effected. Below lists those descendents.
>
> arch_add_memory()
> add_pages()
> __add_pages()
> __add_section()
>
> "
[...]
--
Thanks,
David / dhildenb
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