Messages in this thread | | | Subject | Re: [PATCH v5 00/14] blk-mq: Reduce static requests memory footprint for shared sbitmap | From | John Garry <> | Date | Fri, 8 Oct 2021 09:07:25 +0100 |
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On 08/10/2021 04:11, Bart Van Assche wrote:
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> On 10/7/21 13:31, Kashyap Desai wrote: >> I tested this patchset on 5.15-rc4 (master) - >> https://github.com/torvalds/linux.git >> >> #1 I noticed some performance regression @mq-deadline scheduler which >> is not >> related to this series. I will bisect and get more detail about this >> issue >> separately. > > Please test this patch series on top of Jens' for-next branch > (git://git.kernel.dk/linux-block). The mq-deadline performance on Jens' > for-next branch should match that of kernel v5.13.
Kashyap did also mention earlier that he say the drop from v5.11 -> v5.12.
The only thing I saw possibly related there was Jan's work in https://lore.kernel.org/linux-block/20210111164717.21937-1-jack@suse.cz/ to fix a performance regression witnessed on megaraid sas for slower media.
But I quite doubtful that this is the issue.
Thanks, John
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