Re: [PATCH 0/6] v4 block refcount conversion patches

[Johannes Thumshirn]

Elena Reshetova <elena.reshetova@xxxxxxxxx> writes:
> Elena Reshetova (6):
>   block: convert bio.__bi_cnt from atomic_t to refcount_t
>   block: convert blk_queue_tag.refcnt from atomic_t to refcount_t
>   block: convert blkcg_gq.refcnt from atomic_t to refcount_t
>   block: convert io_context.active_ref from atomic_t to refcount_t
>   block: convert bsg_device.ref_count from atomic_t to refcount_t
>   drivers, block: convert xen_blkif.refcnt from atomic_t to refcount_t

Hi Elena,

While the bsg ref_count is cheap, do you have any numbers how the other
conversions compare in performance (throughput and latency) vs atomics?

It should be quite easy to measure against a null_blk device.

Thanks a lot,
       Johannes

-- 
Johannes Thumshirn                                          Storage
jthumshirn@xxxxxxx                                +49 911 74053 689
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