Messages in this thread | | | From | Sergey Senozhatsky <> | Subject | [PATCHv3 0/9] introduce on-demand device creation | Date | Mon, 27 Apr 2015 22:21:42 +0900 |
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We currently don't support zram on-demand device creation. The only way to have N zram devices is to specify num_devices module parameter (default value 1). That means that if, for some reason, at some point, user wants to have N + 1 devies he/she must umount all the existing devices, unload the module, load the module passing num_devices equals to N + 1.
This patchset introduces zram-control sysfs class, which has two sysfs attrs:
- zram_add -- add a new zram device - zram_remove -- remove a specific (device_id) zram device
Usage example: # add a new specific zram device cat /sys/class/zram-control/zram_add 1
# remove a specific zram device echo 4 > /sys/class/zram-control/zram_remove
V3: -- rebase against 4.1 -- review comments from Minchan were addressed -- no sysfs RO tricks anymore
V2: -- quick rebase and cleanup in attempt to catch 4.1 merge window
Sergey Senozhatsky (9): zram: add `compact` sysfs entry to documentation zram: cosmetic ZRAM_ATTR_RO code formatting tweak zram: use idr instead of `zram_devices' array zram: reorganize code layout zram: remove max_num_devices limitation zram: report every added and removed device zram: trivial: correct flag operations comment zram: return zram device_id from zram_add() zram: add dynamic device add/remove functionality
Documentation/blockdev/zram.txt | 29 +- drivers/block/zram/zram_drv.c | 975 ++++++++++++++++++++++------------------ drivers/block/zram/zram_drv.h | 6 - 3 files changed, 558 insertions(+), 452 deletions(-)
-- 2.4.0.rc3.3.g6eb1401
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