Re: [PATCH RFT 0/3] blk-mq: Optimise blk_mq_queue_tag_busy_iter() for shared tags

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On 26/11/2021 11:51, John Garry wrote:
This patch set improves above call trace even after disk_util=0 is set.
ok, fine. Thanks for testing.

So I guess that this is a regression, and you would want this series for v5.16, right? My changes were made with v5.17 in mind.

I am not sure how Jens feels about it, since the changes are significant. It would be a lot easier to argue for v5.16 if we got to this point earlier in the cycle...


note: I will now resend for 5.17 and add your tested-by, please let me know if unhappy about that.

Anyway, it would be good to have full review first, so please help with that.

@Ming, can you please give feedback on 3/3 here?

Thanks and also to Hannes for the reviews.

john



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