xavi/android_kernel_m2note/drivers/mmc/card/queue.c, branch ng-7.1.2

UPSTREAM: block: disable entropy contributions for nonrot devices

2017-12-27T17:09:02+00:00

(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 Signed-off-by: Jens Axboe Signed-off-by: Mister Oyster

ANDROID: mmc: move to a SCHED_FIFO thread

2017-04-11T09:00:28+00:00

(cherry picked from commit 011e507b413393eab8279dac8b778ad9b6e9971b) Running mmcqd as a prio 120 thread forces it to compete with standard user processes for IO performance, especially when the system is under severe CPU load. Move it to a SCHED_FIFO thread to reduce the impact of load on IO performance. Signed-off-by: Tim Murray Bug: 25392275 Change-Id: I1edfe73baa25e181367c30c1f40fee886e92b60d

3.10.78 -> 3.10.79

2016-08-26T14:16:17+00:00

first commit

2016-08-15T02:19:42+00:00