Sergey Senozhatsky 015254daf1 zram: use notify_free to account all free notifications ... `notify_free' device attribute accounts the number of slot free notifications and internally represents the number of zram_free_page() calls. Slot free notifications are sent only when device is used as a swap device, hence `notify_free' is used only for swap devices. Since f4659d8e62 (zram: support REQ_DISCARD) ZRAM handles yet another one free notification (also via zram_free_page() call) -- REQ_DISCARD requests, which are sent by a filesystem, whenever some data blocks are discarded. However, there is no way to know the number of notifications in the latter case. Use `notify_free' to account the number of pages freed by zram_bio_discard() and zram_slot_free_notify(). Depending on usage scenario `notify_free' represents: a) the number of pages freed because of slot free notifications, which is equal to the number of swap_slot_free_notify() calls, so there is no behaviour change b) the number of pages freed because of REQ_DISCARD notifications Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: Minchan Kim <minchan@kernel.org> Acked-by: Jerome Marchand <jmarchan@redhat.com> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-10-09 22:26:03 -04:00
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Kconfig	zram: add lz4 algorithm backend	2014-04-07 16:36:01 -07:00
Makefile	zram: add lz4 algorithm backend	2014-04-07 16:36:01 -07:00
zcomp_lz4.c	zram: add lz4 algorithm backend	2014-04-07 16:36:01 -07:00
zcomp_lz4.h	zram: add lz4 algorithm backend	2014-04-07 16:36:01 -07:00
zcomp_lzo.c	zram: introduce compressing backend abstraction	2014-04-07 16:36:01 -07:00
zcomp_lzo.h	zram: introduce compressing backend abstraction	2014-04-07 16:36:01 -07:00
zcomp.c	zram: use scnprintf() in attrs show() methods	2014-04-07 16:36:02 -07:00
zcomp.h	zram: propagate error to user	2014-04-07 16:36:02 -07:00
zram_drv.c	zram: use notify_free to account all free notifications	2014-10-09 22:26:03 -04:00
zram_drv.h	zram: report maximum used memory	2014-10-09 22:26:02 -04:00