Re: [PATCH 3/4] chmem: new tool

[Heiko Carstens <heiko.carstens@de.ibm.com>]

On Wed, Oct 12, 2016 at 02:00:46PM +0200, Heiko Carstens wrote:
> Move the s390 specific chmem tool to util-linux.
> 
> The chmem tool was originally written in perl and is part of the
> s390-tools package which can be found here:
> https://www.ibm.com/developerworks/linux/linux390/s390-tools.html
> 
> Given that the tool is architecture independent, there is no reason to
> keep it in an s390 specific repository. It seems to be useful for
> other architectures as well.
> 
> This patch converts the tool to C and adds it to util-linux, while the
> command line options stay compatible. The only exception is the option
> "-v" which used to be the short form of "--version". That got changed
> to "-V" so it behaves like most other tools contained within
> util-linux.
> 
> The chmem tool can be used to set memory online or offline. This can
> be achieved by specifying a memory range:
> 
> Memory Block 19 (0x0000000130000000-0x000000013fffffff) disabled
> 
> or by specifying a size where chmem will automatically select memory
> blocks:
> 
> Memory Block 21 (0x0000000150000000-0x000000015fffffff) disable failed
> Memory Block 18 (0x0000000120000000-0x000000012fffffff) disabled
> Memory Block 17 (0x0000000110000000-0x000000011fffffff) disabled
> Memory Block 16 (0x0000000100000000-0x000000010fffffff) disabled
> Memory Block 15 (0x00000000f0000000-0x00000000ffffffff) disabled
> 
> or by specifying memory block numbers instead of address ranges:
> 
> Memory Block 15 (0x00000000f0000000-0x00000000ffffffff) disabled
> Memory Block 16 (0x0000000100000000-0x000000010fffffff) disabled
> Memory Block 17 (0x0000000110000000-0x000000011fffffff) disabled
> Memory Block 18 (0x0000000120000000-0x000000012fffffff) disabled
> 
> This is based on a patch from Clemens von Mann.
> 
> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

I just realized that the above "examples" don't make sense, since the
commands that were used are missing. That happened because I started the
lines with "#", which apparently git assumed to be a comment and therefore
ignored the lines.

So the correct description, which contains the commands, should be:

> The chmem tool can be used to set memory online or offline. This can
> be achieved by specifying a memory range:
>
> $ chmem -v -d 0x0000000130000000-0x000000013fffffff
> Memory Block 19 (0x0000000130000000-0x000000013fffffff) disabled
>
> or by specifying a size where chmem will automatically select memory
> blocks:
>
> $ chmem -v -d  1g
> Memory Block 21 (0x0000000150000000-0x000000015fffffff) disable failed
> Memory Block 18 (0x0000000120000000-0x000000012fffffff) disabled
> Memory Block 17 (0x0000000110000000-0x000000011fffffff) disabled
> Memory Block 16 (0x0000000100000000-0x000000010fffffff) disabled
> Memory Block 15 (0x00000000f0000000-0x00000000ffffffff) disabled
>
> or by specifying memory block numbers instead of address ranges:
>
> $ chmem -v -d -b 15-18
> Memory Block 15 (0x00000000f0000000-0x00000000ffffffff) disabled
> Memory Block 16 (0x0000000100000000-0x000000010fffffff) disabled
> Memory Block 17 (0x0000000110000000-0x000000011fffffff) disabled
> Memory Block 18 (0x0000000120000000-0x000000012fffffff) disabled