About sbitmap_bitmap_show() and cleared bits (was Re: [PATCH RFC v7 07/12] blk-mq: Add support in hctx_tags_bitmap_show() for a shared sbitmap)

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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.

Any thoughts on this?

Thanks!



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