Mike Snitzer 30046ef03c 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. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>		2016-02-10 01:37:31 +00:00
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Kconfig	Remove GENERIC_HARDIRQ config option	2014-02-07 13:49:47 -08:00
Makefile	…
mtip32xx.c	UPSTREAM: block: disable entropy contributions for nonrot devices	2016-02-10 01:37:31 +00:00
mtip32xx.h	Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block	2013-05-08 11:51:05 -07:00