Mike Snitzer b636eb75ff UPSTREAM: block: disable entropy contributions for nonrot devices ... (cherry picked from commit b277da0a8a594308e17881f4926879bd5fca2a2d) Clear QUEUE_FLAG_ADD_RANDOM in all block drivers that set QUEUE_FLAG_NONROT. Historically, all block devices have automatically made entropy contributions. But as previously stated in commit e2e1a148 ("block: add sysfs knob for turning off disk entropy contributions"): - On SSD disks, the completion times aren't as random as they are for rotational drives. So it's questionable whether they should contribute to the random pool in the first place. - Calling add_disk_randomness() has a lot of overhead. There are more reliable sources for randomness than non-rotational block devices. From a security perspective it is better to err on the side of caution than to allow entropy contributions from unreliable "random" sources. Change-Id: Iaace159bea0e9245e6825cccd4f6a1152a166ce1 Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>		2019-07-27 21:47:56 +02:00
..
Kconfig	zram: add lz4 algorithm backend	2016-05-18 14:34:35 +05:30
Makefile	zram: add lz4 algorithm backend	2016-05-18 14:34:35 +05:30
zcomp.c	UPSTREAM: zram: pass gfp from zcomp frontend to backend	2019-07-27 21:47:55 +02:00
zcomp.h	UPSTREAM: zram: pass gfp from zcomp frontend to backend	2019-07-27 21:47:55 +02:00
zcomp_lz4.c	UPSTREAM: zram/zcomp: do not zero out zcomp private pages	2019-07-27 21:47:55 +02:00
zcomp_lz4.h	zram: add lz4 algorithm backend	2016-05-18 14:34:35 +05:30
zcomp_lzo.c	UPSTREAM: zram/zcomp: do not zero out zcomp private pages	2019-07-27 21:47:55 +02:00
zcomp_lzo.h	zram: introduce compressing backend abstraction	2016-05-18 14:34:33 +05:30
zram_drv.c	UPSTREAM: block: disable entropy contributions for nonrot devices	2019-07-27 21:47:56 +02:00
zram_drv.h	zram: remove workqueue for freeing removed pending slot	2016-05-18 14:35:57 +05:30