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| author | Jens Axboe <axboe@fb.com> | 2016-04-12 20:32:46 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-04-12 23:46:27 +0200 |
| commit | 93e9d8e836cb1a9a58b33eb6643bf061c6119ef2 (patch) | |
| tree | 17a50abdadaa58686983510230932323bf5d123c /Documentation/trace | |
| parent | blk-mq: Export tagset iter function (diff) | |
| download | linux-93e9d8e836cb1a9a58b33eb6643bf061c6119ef2.tar.xz linux-93e9d8e836cb1a9a58b33eb6643bf061c6119ef2.zip | |
block: add ability to flag write back caching on a device
Add an internal helper and flag for setting whether a queue has
write back caching, or write through (or none). Add a sysfs file
to show this as well, and make it changeable from user space.
This will replace the (awkward) blk_queue_flush() interface that
drivers currently use to inform the block layer of write cache state
and capabilities.
Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'Documentation/trace')
0 files changed, 0 insertions, 0 deletions