linux-kernel - Re: [RFC patch] block: add round robin dispatch in noop IO scheduler

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Message-ID: <x498vf2lzv4.fsf@segfault.boston.devel.redhat.com>
Date:	Mon, 02 Jul 2012 15:36:15 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Hillf Danton <dhillf@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC patch] block: add round robin dispatch in noop IO scheduler

Hillf Danton <dhillf@...il.com> writes:

> Requests are grouped according to IO context, and dispatched in round
> robin, one request per context a time, then noop serves flash based
> disk "fair"?

NACK.  Noop means noop.  You can have a look, and maybe contribute to
the work that Shaohua Li is doing.  He proposed an IOPS-based scheduler
here:
  http://lwn.net/Articles/474164/

Cheers,
Jeff
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