> -----Original Message----- > From: John Garry [mailto:john.garry@xxxxxxxxxx] > Sent: Monday, October 18, 2021 3:11 PM > To: axboe@xxxxxxxxx > Cc: ming.lei@xxxxxxxxxx; linux-block@xxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; kashyap.desai@xxxxxxxxxxxx; hare@xxxxxxx; John > Garry <john.garry@xxxxxxxxxx> > Subject: [PATCH v2] blk-mq: Fix blk_mq_tagset_busy_iter() for shared tags > > Since it is now possible for a tagset to share a single set of tags, the iter > function should not re-iter the tags for the count of #hw queues in that case. > Rather it should just iter once. > > Fixes: e0fdf846c7bb ("blk-mq: Use shared tags for shared sbitmap support") > Reported-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxx> > Signed-off-by: John Garry <john.garry@xxxxxxxxxx> > Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx> > --- > Diff to v1: > - Add Ming's RB tag Now I noticed proper host_busy in my test. Still CPU hogging is not resolved, but issue addressed by this patch is resolved. Tested-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxx>
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