admin-guide/blockdev/zram.rst

51 	  and writeback simultaneously).
324 not used pages). This feature is useful for e.g. zram writeback and
340 writeback
350 If admin wants to use incompressible page writeback, they could do it via::
352 	echo huge > /sys/block/zramX/writeback
354 Admin can request writeback of idle pages at right timing via::
356 	echo idle > /sys/block/zramX/writeback
358 With the command, zram will writeback idle pages from memory to the storage.
360 Additionally, if a user choose to writeback only huge and idle pages
363         echo huge_idle > /sys/block/zramX/writeback
365 If a user chooses to writeback only incompressible pages (pages that none of
368 	echo incompressible > /sys/block/zramX/writeback
373 	echo "page_index=1251" > /sys/block/zramX/writeback
382 	echo "type=idle" > /sys/block/zramX/writeback
384 		/sys/block/zramX/writeback
390 		page_indexes=500-700 > /sys/block/zramX/writeback
398 any writeback. IOW, if admin wants to apply writeback budget, they should
403 Once writeback_limit_enable is set, zram doesn't allow any writeback
409 If admin wants to limit writeback as per-day 400M, they could do it
424 If an admin wants to see the remaining writeback budget since last set::
428 If an admin wants to disable writeback limit, they could do::
434 writeback happened until you reset the zram to allocate extra writeback
437 If admin wants to measure writeback count in a certain period, they could