-----Original Message-----
From: John Garry [mailto:<redacted>]
Sent: Tuesday, October 5, 2021 7:05 PM
To: Jens Axboe <axboe@kernel.dk>; kashyap.desai@broadcom.com
Cc: <redacted>; <redacted>;
ming.lei@redhat.com; hare@suse.de; linux-scsi@vger.kernel.org
Subject: Re: [PATCH v5 00/14] blk-mq: Reduce static requests memory
footprint for shared sbitmap
On 05/10/2021 13:35, Jens Axboe wrote:
quoted
quoted
Baseline is 1b2d1439fc25 (block/for-next) Merge branch
'for-5.16/io_uring'
into for-next
Let's get this queued up for testing, thanks John.
Cheers, appreciated
@Kashyap, You mentioned that when testing you saw a performance
regression from v5.11 -> v5.12 - any idea on that yet? Can you describe
the
scenario, like IO scheduler and how many disks and the type? Does
disabling
host_tagset_enable restore performance?
John - I am still working on this. System was not available due to some
other debugging.
From checking differences between those kernels, I don't see anything
directly relevant in sbitmap support or in the megaraid sas driver.
Thanks,
John