linux-kernel - Re: [RFC 2/3]block: FIOPS ioscheduler core

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Date:	Fri, 6 Jan 2012 15:05:07 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	Shaohua Li <shaohua.li@...el.com>
Cc:	linux-kernel@...r.kernel.org, axboe@...nel.dk, vgoyal@...hat.com,
	jmoyer@...hat.com
Subject: Re: [RFC 2/3]block: FIOPS ioscheduler core

> ===================================================================
> --- linux.orig/block/Kconfig.iosched    2011-12-28 09:42:18.000000000 +0800
> +++ linux/block/Kconfig.iosched 2012-01-04 13:58:35.000000000 +0800
> @@ -43,6 +43,14 @@ config CFQ_GROUP_IOSCHED
>        ---help---
>          Enable group IO scheduling in CFQ.
>
> +config IOSCHED_FIOPS
> +       tristate "IOPS based I/O scheduler"
> +       default y
> +       ---help---
> +         This is an IOPS based I/O scheduler. It will try to distribute
> +          IOPS equally among all processes in the system. It's mainly for
> +          Flash based storage.
> +
>  choice
>        prompt "Default I/O scheduler"
>        default DEFAULT_CFQ
Hi.
Is below code needed ?
choice
        prompt "Default I/O scheduler"
        default DEFAULT_CFQ
        help
          Select the I/O scheduler which will be used by default for all
          block devices.

        config DEFAULT_DEADLINE
                bool "Deadline" if IOSCHED_DEADLINE=y

        config DEFAULT_CFQ
                bool "CFQ" if IOSCHED_CFQ=y

+        config DEFAULT_FIOPS
+                bool "FIOPS" if IOSCHED_FIOPS=y

        config DEFAULT_NOOP
                bool "No-op"

config DEFAULT_IOSCHED
        string
        default "deadline" if DEFAULT_DEADLINE
        default "cfq" if DEFAULT_CFQ
        default "noop" if DEFAULT_NOOP
+        default "fiops" if DEFAULT_FIOPS
--
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