admin-guide/blockdev/zram.rst

54 If you use 'echo', the returned value is set by the 'echo' utility,
57 	echo foo > /sys/block/zram0/comp_algorithm
91 	echo lzo > /sys/block/zram0/comp_algorithm
110 	echo "algo=zstd dict=/etc/dictionary" > /sys/block/zram0/algorithm_params
113 	echo "priority=1 dict=/etc/dictionary" > \
117 	echo "algo=zstd level=8 dict=/etc/dictionary" > \
135 	echo $((50*1024*1024)) > /sys/block/zram0/disksize
138 	echo 256K > /sys/block/zram0/disksize
139 	echo 512M > /sys/block/zram0/disksize
140 	echo 1G > /sys/block/zram0/disksize
156 	echo $((50*1024*1024)) > /sys/block/zram0/mem_limit
159 	echo 256K > /sys/block/zram0/mem_limit
160 	echo 512M > /sys/block/zram0/mem_limit
161 	echo 1G > /sys/block/zram0/mem_limit
164 	echo 0 > /sys/block/zram0/mem_limit
195 	echo X > /sys/class/zram-control/hot_remove
312 		echo 1 > /sys/block/zram0/reset
313 		echo 1 > /sys/block/zram1/reset
329 	echo all > /sys/block/zramX/idle
337 	echo 86400 > /sys/block/zramX/idle
349 	echo /dev/sda5 > /sys/block/zramX/backing_dev
354 	echo huge > /sys/block/zramX/writeback
358 	echo idle > /sys/block/zramX/writeback
365         echo huge_idle > /sys/block/zramX/writeback
370 	echo incompressible > /sys/block/zramX/writeback
375 	echo "page_index=1251" > /sys/block/zramX/writeback
384 	echo "type=idle" > /sys/block/zramX/writeback
385 	echo "page_indexes=1-100 page_indexes=200-300" > \
391 	echo page_index=42 page_index=99 page_indexes=100-200 \
403 	$ echo 1 > /sys/block/zramX/writeback_limit_enable
416 	$ echo $((400<<MB_SHIFT>>4K_SHIFT)) > \
418 	$ echo 1 > /sys/block/zram0/writeback_limit_enable
423 	$ echo $((400<<MB_SHIFT>>4K_SHIFT)) > \
432 	$ echo 0 > /sys/block/zramX/writeback_limit_enable
435 system reboot, echo 1 > /sys/block/zramX/reset) so keeping how many of
446 	$ echo yes > /sys/block/zramX/compressed_writeback
457 	$ echo 64 > /sys/block/zramX/writeback_batch_size
493 	echo "algo=zstd priority=1" > /sys/block/zramX/recomp_algorithm
496 	echo "algo=deflate priority=2" > /sys/block/zramX/recomp_algorithm
504 	echo "type=idle" > /sys/block/zramX/recompress
507 	echo "type=huge" > /sys/block/zram0/recompress
510 	echo "type=huge_idle" > /sys/block/zramX/recompress
517 	echo "threshold=3000" > /sys/block/zramX/recompress
520 	echo "type=idle threshold=2000" > /sys/block/zramX/recompress
525 	echo "type=huge_idle max_pages=42" > /sys/block/zramX/recompress
544 	echo "type=huge algo=zstd" > /sys/block/zramX/recompress
547 	echo "type=huge priority=1" > /sys/block/zramX/recompress