kernel.git/drivers/md/bcache/super.c, branch linux-4.2.y

bcache: use kvfree() in various places

2015-07-01T02:45:00Z

Use kvfree() instead of open-coding it. Signed-off-by: Pekka Enberg Cc: Kent Overstreet Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

block: disable entropy contributions for nonrot devices

2014-10-04T16:55:32Z

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

bcache: Drop unneeded blk_sync_queue() calls

2014-08-04T22:23:04Z

this is needed for the queue/block device we created (it's done by blk_cleanup_queue() which we do call) - but calling it for the block devices we only opened is pointless. Change-Id: I53dfded14ed15b9581d10ca8399d5e1b3abbf9f2

bcache: add mutex lock for bch_is_open

2014-08-04T22:23:04Z

Since bch_is_open will iterate linked list bch_cache_sets and uncached_devices, it needs bch_register_lock. Signed-off-by: Jianjian Huo

bcache: try to set b->parent properly

2014-08-04T22:23:04Z

bcache_flash_dev.ktest would reliably crash with 8k and 16k bucket size before; now it passes. Change-Id: Ib542232235e39298c3a7548fe52b645cabb823d1

bcache: fix memory corruption in init error path

2014-08-04T22:23:04Z

If register_cache_set() failed, we would touch ca->set after it had already been freed. Also, fix an assertion to catch this. Change-Id: I748e5f5b223e2d9b2602075dec2f997cced2394d

bcache: fix crash with incomplete cache set

2014-08-04T22:23:04Z

Change-Id: I6abde52afe917633480caaf4e2518f42a816d886

bcache: Fix more early shutdown bugs

2014-08-04T22:23:04Z

Signed-off-by: Kent Overstreet

bcache: fix uninterruptible sleep in writeback thread

2014-08-04T22:23:03Z

There were two issues here: - writeback thread did not start until the device first became dirty - writeback thread used uninterruptible sleep once running Without this patch I see kernel warnings printed and a load average of 1.52 after booting my test VM. With this patch the warnings are gone and the load average is near 0.00 as expected. Signed-off-by: Kent Overstreet

bcache: wait for buckets when allocating new btree root

2014-08-04T22:23:03Z

Tested: - sometimes bcache_tier test would hang on startup with a failure to allocate the btree root -- no longer seeing this Signed-off-by: Kent Overstreet