* "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>
