If zram-backed swap is added after an existing swap, it gets a lower
priority. Assiming that usually all other swaps are slower, there should
be a way to assign a higher priority to zram swap.
Signed-off-by: Maxim Storchak <m.storchak@gmail.com>
This patch adds two new commands:
zram status - shows memory stats for all zram swaps
zram compaction - trigger compaction for all zram swaps
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Executing '/etc/init.d/zram start' during runtime (with a swap being already
mounted) triggers zram device compaction and prints out nice stats info about
zram memory usage
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [use IEC's MiB unit]
- fix dependency on BUSYBOX_CONFIG_SWAPONOFF (removed in 84da2a6)
- add busybox defaults checking (fix zram-swap always installs swap-utils
and libblkid as dependency, even if busybox includes mkswap by default)
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
Config option to limit maximum compression streams per zram dev for
multicore CPU's. This could be defined via 'zram_comp_streams' option in
the 'system' section of '/etc/config/system' file or via cli (for e.x.
with 'uci set system.@System[0].zram_comp_streams=2 && uci commit
system'). Default is number of logical CPU cores.
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
Use only one zram swap device of the specified $size instead of
[N x $size] devices for multicore CPUs Now zram module uses multiple
compression streams for each dev by default, so we do not need to create
several zram devs to utilize multicore CPUs.
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
* "zram stop" could reset up to $(num_of_cores) zram devices even if
some of those were not mounted as swap dev's. This fix tries to
enumerate mounted swap zram dev's before making a reset
* remove hot-added zram devs on stop (except zram0)
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
Compression algorithms for zram are provided by kernel crypto API, could
be any of [lzo|zl4|deflate|<some_more>] depending on kernel modules.
Compress algo for zram-swap could be defined via 'zram_comp_algo' option
in 'system' section of '/etc/config/system' file, or via cli (for e.x.
with 'uci set system.@System[0].zram_comp_algo=lz4 && uci commit
system'). check available algo's via 'cat /sys/block/zram0
/comp_algorithm'
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
Enable CONFIG_PROCD_ZRAM_TMPFS compatibility via two changes to list_cpu_idx():
* detect if /tmp is being used by /dev/zram0; if yes, offset initial value by 1 to skip first zram device.
* hot-add /dev/zram1, if not already present.
Signed-off-by: Conn O'Griofa >connogriofa@gmail.com>
Note, that licensing stuff is a nightmare: many packages does not clearly
state their licenses, and often multiple source files are simply copied
together - each with different licensing information in the file headers.
I tried hard to ensure, that the license information extracted into the OpenWRT's
makefiles fit the "spirit" of the packages, e.g. such small packages which
come without a dedicated source archive "inherites" the OpenWRT's own license
in my opinion.
However, I can not garantee that I always picked the correct information
and/or did not miss license information.
Signed-off-by: Michael Heimpold <mhei@heimpold.de>
SVN-Revision: 43155
swapon/swapoff are no longer provided by swap-utils; they are provided
by block-mount instead.
Signed-off-by: Nathan Hintz <nlhintz@hotmail.com>
SVN-Revision: 38795
