Let's keep lsmem backwardly compatible (<=v2.30) and create ranges
according to the output columns by default. This default behavior may
be modified by --split command line option.
Signed-off-by: Karel Zak <kzak@redhat.com>
Now the way how lsmem lists memory ranges is affected by used output
columns. It makes it very difficult to use in scripts where you want
to use for example only one column
ranges=$(lsmem -oRANGE)
and in this case all is merged to the one (or two) huge ranges and all
attributes are ignored. The --split allows to control this behavior
ranges=$(lsmem -oRANGE --split=STATE,ZONES)
forces lsmem to list ranges by STATE and ZONES differences.
Signed-off-by: Karel Zak <kzak@redhat.com>
With this patch, valid memory zones can be shown with lsmem, and chmem can
set memory online/offline in a specific memory zone, if allowed by the
kernel. The valid memory zones are read from the "valid_zones" sysfs
attribute, and setting memory online to a specific zone is done by
echoing "online_kernel" or "online_movable" to the "state" sysfs
attribute, in addition to the previous "online".
This patch also changes the default behavior of chmem, when setting memory
online without specifying a memory zone. If valid, memory will be set
online to the zone Movable. This zone is preferable for memory hotplug, as
it makes memory offline much more likely to succeed.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
* add missing new options
* remove columns description (for ls-like utils we maintains columns
description only in the --help output)
Signed-off-by: Karel Zak <kzak@redhat.com>
Move the s390 specific lsmem tool to util-linux.
The lsmem 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 lsmem tool inspect the contents of /sys/devices/system/memory and
prints a summary output similar to what lscpu does:
RANGE SIZE STATE REMOVABLE BLOCK
0x0000000000000000-0x000000005fffffff 1,5G online yes 0-5
0x0000000060000000-0x000000007fffffff 512M online no 6-7
0x0000000080000000-0x000000013fffffff 3G online yes 8-19
0x0000000140000000-0x000000014fffffff 256M offline - 20
0x0000000150000000-0x000000017fffffff 768M online no 21-23
Memory block size : 256M
Total online memory : 5,8G
Total offline memory: 256M
In order to keep the output small the tool merges subsequent address
ranges where the attributes are identical. To avoid merging of line
the "-a" option can be used.
The lsmem tool also has "--extendend" and "--parsable" option which
can be used to customize the output, e.g. limit the output to
specified columns. This is quite similar to what the lscpu tool does.
This is based on a patch from Clemens von Mann.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Sami Kerola
Yuri Chornoivan
Ruediger Meier
Karel Zak
Gerald Schaefer
Sébastien Helleu
Heiko Carstens