Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/sys-utils/zramctl.8.adoc b/sys-utils/zramctl.8.adoc
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+//po4a: entry man manual
+= zramctl(8)
+:doctype: manpage
+:man manual: System Administration
+:man source: util-linux {release-version}
+:page-layout: base
+:command: zramctl
+
+== NAME
+
+zramctl - set up and control zram devices
+
+== SYNOPSIS
+
+Get info: ::
+
+*zramctl* [options]
+
+Reset zram: ::
+
+*zramctl* *-r* _zramdev_...
+
+Print name of first unused zram device: ::
+
+*zramctl* *-f*
+
+Set up a zram device: ::
+
+*zramctl* [*-f* | _zramdev_] [*-s* _size_] [*-t* _number_] [*-a* _algorithm_]
+
+== DESCRIPTION
+
+*zramctl* is used to quickly set up zram device parameters, to reset zram devices, and to query the status of used zram devices.
+
+If no option is given, all non-zero size zram devices are shown.
+
+Note that _zramdev_ node specified on command line has to already exist. The command *zramctl* creates a new _/dev/zram<N>_ nodes only when *--find* option specified. It's possible (and common) that after system boot _/dev/zram<N>_ nodes are not created yet.
+
+== OPTIONS
+
+*-a*, **--algorithm lzo**|**lz4**|**lz4hc**|**deflate**|**842**|**zstd**::
+Set the compression algorithm to be used for compressing data in the zram device.
+
+*-f*, *--find*::
+Find the first unused zram device. If a *--size* argument is present, then initialize the device.
+
+*-n*, *--noheadings*::
+Do not print a header line in status output.
+
+*-o*, *--output* _list_::
+Define the status output columns to be used. If no output arrangement is specified, then a default set is used. Use *--help* to get a list of all supported columns.
+
+*--output-all*::
+Output all available columns.
+
+*--raw*::
+Use the raw format for status output.
+
+*-r*, *--reset*::
+Reset the options of the specified zram device(s). Zram device settings can be changed only after a reset.
+
+*-s*, *--size* _size_::
+Create a zram device of the specified _size_. Zram devices are aligned to memory pages; when the requested _size_ is not a multiple of the page size, it will be rounded up to the next multiple. When not otherwise specified, the unit of the _size_ parameter is bytes.
++
+The _size_ argument may be followed by the multiplicative suffixes KiB (=1024), MiB (=1024*1024), and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the "iB" is optional, e.g., "K" has the same meaning as "KiB") or the suffixes KB (=1000), MB (=1000*1000), and so on for GB, TB, PB, EB, ZB and YB.
+
+*-t*, *--streams* _number_::
+Set the maximum number of compression streams that can be used for the device. The default is use all CPUs and one stream for kernels older than 4.6.
+
+include::man-common/help-version.adoc[]
+
+== EXIT STATUS
+
+*zramctl* returns 0 on success, nonzero on failure.
+
+== FILES
+
+_/dev/zram[0..N]_::
+zram block devices
+
+== EXAMPLE
+
+The following commands set up a zram device with a size of one gigabyte and use it as swap device.
+
+....
+ # zramctl --find --size 1024M
+ /dev/zram0
+ # mkswap /dev/zram0
+ # swapon /dev/zram0
+ ...
+ # swapoff /dev/zram0
+ # zramctl --reset /dev/zram0
+....
+
+== AUTHORS
+
+mailto:nefelim4ag@gmail.com[Timofey Titovets],
+mailto:kzak@redhat.com[Karel Zak]
+
+== SEE ALSO
+
+link:http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/blockdev/zram.rst[Linux kernel documentation]
+
+include::man-common/bugreports.adoc[]
+
+include::man-common/footer.adoc[]
+
+ifdef::translation[]
+include::man-common/translation.adoc[]
+endif::[]