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>
This patch extends the valid --output values with ZONES for the
lsmem bash-completion, and adds the --zone option for the chmem
bash-completion.
Signed-off-by: Andre Wild <wild@linux.vnet.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
The existing s390 and x86_64 dumps already contain the valid_zones sysfs
attribute, so just add a new "lsmem -o +ZONES" test command and update
the expected results.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.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>
The open() syscall is probably the most strong way how to check write
accessibility in all situations, but it's overkill and on some
paranoid systems with enabled audit/selinux. It fills logs with
"Permission denied" entries. Let's use eaccess() if available.
Signed-off-by: Karel Zak <kzak@redhat.com>
This allows to conveniently kill the entire process tree
below the forked program, a common problem when scripting
tasks that need to reliably fully terminate without leaving
reparented subprocesses behind.
The example added to the man page shows the most common use.
Implemented using prctl(PR_SET_PDEATHSIG, ...).
* add comment to explain when nolinesep flag is necessary
* force to print \n before switch to the next line to support
./sample-scols-continuous > file
use case.
Addresses: https://github.com/ignatenkobrain/python-smartcols/issues/18
Signed-off-by: Karel Zak <kzak@redhat.com>
The current code sets noact flag if unix socked connection failed. This is ugly.
We want to reconnect always in all cases (well, except --socket-error=on).
Signed-off-by: Karel Zak <kzak@redhat.com>
The libc syslog() reconnects on failed send(). We need the same thing
as logger(1) is expected as long time running tool. For example
recommended Apache configuration is:
ErrorLog "| /usr/bin/logger -t apache_error -p local6.debug"
The issue is that connection endpoint (e.g. syslogd) maybe restarted.
The simple way how to test is:
for i in $(seq 0 3600); do echo "This is message number $i"; sleep 1; done | logger --tcp --server 127.0.0.1 --port 514
and restart your syslog. The current implementation gets SIGPIPE or
write warning message, but it never reconnect.
Addresses: https://github.com/karelzak/util-linux/issues/363
Signed-off-by: Karel Zak <kzak@redhat.com>
Karel Zak
Andre Wild
Gerald Schaefer
Sebastian Rasmussen
Rafael Fontenelle
Jakub Bogusz
Sami Kerola
James Sanford
Niklas Hambüchen
Liam Ryan