Re: [PATCH v2 09/12] blk-mq: untangle debugfs and sysfs

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On 05/04/2017 09:31 AM, Omar Sandoval wrote:
> From: Omar Sandoval <osandov@xxxxxx>
> 
> Originally, I tied debugfs registration/unregistration together with
> sysfs. There's no reason to do this, and it's getting in the way of
> letting schedulers define their own debugfs attributes. Instead, tie the
> debugfs registration to the lifetime of the structures themselves.
> 
> The saner lifetimes mean we can also get rid of the extra mq directory
> and move everything one level up. I.e., nvme0n1/mq/hctx0/tags is now
> just nvme0n1/hctx0/tags.
> 
> Signed-off-by: Omar Sandoval <osandov@xxxxxx>
> ---
>  block/blk-core.c       |   9 +---
>  block/blk-mq-debugfs.c | 110 ++++++++++++++++++++++++++++---------------------
>  block/blk-mq-debugfs.h |  21 ++++++++--
>  block/blk-mq-sysfs.c   |  11 -----
>  block/blk-mq.c         |   7 ++++
>  block/blk-sysfs.c      |   2 +
>  include/linux/blk-mq.h |   4 ++
>  include/linux/blkdev.h |   1 -
>  8 files changed, 94 insertions(+), 71 deletions(-)
> 
Again, I really liked the symmetry between sysfs and debugfs mq entries.
This will definitely break it.

Not sure if that's a real issue, but personally I liked the mapping.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@xxxxxxx			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)



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