From: Jens Axboe <axboe@kernel.dk>
To: Jan Kara <jack@suse.cz>, linux-block@vger.kernel.org
Cc: mgorman@suse.de, hare@suse.de
Subject: Re: elevator= kernel argument for recent kernels
Date: Wed, 6 Nov 2019 07:15:35 -0700 [thread overview]
Message-ID: <1a0539a7-75c2-1ad6-aa5c-bf07a92e1eb3@kernel.dk> (raw)
In-Reply-To: <20191106105340.GE16085@quack2.suse.cz>
On 11/6/19 3:53 AM, Jan Kara wrote:
> Hello,
>
> with transition to blk-mq, the elevator= kernel argument was removed. I
> understand the reasons for its removal but still I think this may come as a
> surprise to some users since that argument has been there for ages and
> although distributions generally transition to setting appropriate elevator
> by udev rules, there are still people that use that argument with older
> kernels and there are quite a few advices on the Internet to use it. So
> shouldn't we at least warn loudly if someone uses elevator= argument on
> kernels that don't support it and redirect people to sysfs? Something like
> the attached patch? What do people think?
I'm fine with that, my objects have always been centered around trying
to make the parameter work. A warning makes sense to point people in
the right direction. I'll add this for 5.5.
--
Jens Axboe
next prev parent reply other threads:[~2019-11-06 14:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-06 10:53 elevator= kernel argument for recent kernels Jan Kara
2019-11-06 12:55 ` Jeff Moyer
2019-11-06 14:15 ` Jens Axboe [this message]
2019-11-06 15:01 ` Jan Kara
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