linux-kernel - Re: [PATCH v2] delete unnecessary bootmem struct page array

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Date:	Sat, 14 Jun 2014 11:44:04 +0200
From:	Richard Weinberger <richard@....at>
To:	Real Name <enjoymindful@...il.com>,
	user-mode-linux-devel@...ts.sourceforge.net
CC:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] delete unnecessary bootmem struct page array

Hi!

Am 03.06.2014 07:30, schrieb Real Name:
> From: Honggang Li <enjoymindful@...il.com>
> 
> The patch based on linux-next-2014-06-02.
> 
> The old init_maps function does two things:
> 1) allocates and initializes one struct page array for bootmem
> 2) count the number of total pages
> 
> After removed the source code related to the unnecessary array, the name 
> 'init_maps' is some kind of improper named, as it just count the number of
> total page numbers. So, I renamed the function as 'mem_total_pages'.
> 
> I tested the patch through repeat reboot the uml kernel many times.
> [real@...e linux-next]$ make ARCH=um defconfig
> [real@...e linux-next]$ make ARCH=um linux
> [real@...e linux-next]$ file linux
> linux: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, not stripped
> [real@...e linux-next]$ ./linux ubda=/home/real/linux-next/Fedora20-AMD64-root_fs mem=256m && sync && echo 1
> [real@...e linux-next]$ ./linux ubda=/home/real/linux-next/Fedora20-AMD64-root_fs mem=256m && sync && echo 2
> (repeat reboot the uml kernel many times..)

Can you please include in the changelog the commit sha1 which made the old init_maps() obsolete?
I had a look at the pre-git linux tree, looks like init_maps() wasn't touched for more than 10 years.

Thanks,
//richard

> Honggang Li (1):
>   delete unnecessary bootmem struct page array
> 
>  arch/um/include/shared/mem_user.h |  2 +-
>  arch/um/kernel/physmem.c          | 32 ++++++--------------------------
>  arch/um/kernel/um_arch.c          |  7 +------
>  3 files changed, 8 insertions(+), 33 deletions(-)
> 
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