On Mon, 2010-08-09 at 22:56 +0530, Nitin Gupta wrote: > Creates per-device sysfs nodes in /sys/block/zram<id>/ > Currently following stats are exported: > - disksize > - num_reads > - num_writes > - invalid_io > - zero_pages > - orig_data_size > - compr_data_size > - mem_used_total > > By default, disksize is set to 0. So, to start using > a zram device, fist write a disksize value and then > initialize device by writing any positive value to > initstate. For example: > > # initialize /dev/zram0 with 50MB disksize > echo 50*1024*1024 | bc > /sys/block/zram0/disksize > echo 1 > /sys/block/zram0/initstate > > When done using a disk, issue reset to free its memory > by writing any positive value to reset node: > > echo 1 > /sys/block/zram0/reset Maybe I'm just a weirdo, but I don't really use modules much. That effectively means that I'm stuck at boot with one zram device. Making it a read-only module param also means that someone can't add a second at runtime while the first is still in use. It doesn't seem to be used very pervasively, but there is a module_param_cb() function so you can register callbacks when the param gets updated. Might come in handy for this. -- Dave -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>