On 6/29/20 5:32 PM, John Garry wrote:

Hi all,

I noticed that sbitmap_bitmap_show() only shows set bits and does not 
consider cleared bits. Is that the proper thing to do?

I ask, as from trying to support sbitmap_bitmap_show() for hostwide 
shared tags feature, we currently use blk_mq_queue_tag_busy_iter() to 
find active requests (and associated tags/bits) for a particular hctx. 
So, AFAICT, would give a change in behavior for sbitmap_bitmap_show(), 
in that it would effectively show set and not cleared bits.

Why would you need to do this?
Where would be the point traversing cleared bits?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke            Teamlead Storage & Networking
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