linux-kernel - Re: [PATCH RESEND v3 3/7] Intel MIC Host Driver, card OS state management.

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Message-ID: <20130906050037.GE28806@kroah.com>
Date:	Thu, 5 Sep 2013 22:00:37 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Sudeep Dutt <sudeep.dutt@...el.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Rob Landley <rob@...dley.net>, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	linux-doc@...r.kernel.org, Asias He <asias@...hat.com>,
	Nikhil Rao <nikhil.rao@...el.com>,
	Ashutosh Dixit <ashutosh.dixit@...el.com>,
	Caz Yokoyama <Caz.Yokoyama@...el.com>,
	Dasaratharaman Chandramouli 
	<dasaratharaman.chandramouli@...el.com>,
	Harshavardhan R Kharche <harshavardhan.r.kharche@...el.com>,
	"Yaozu (Eddie) Dong" <eddie.dong@...el.com>,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
Subject: Re: [PATCH RESEND v3 3/7] Intel MIC Host Driver, card OS state
 management.

On Thu, Sep 05, 2013 at 04:41:55PM -0700, Sudeep Dutt wrote:
> +What:		/sys/class/mic/mic(x)/cmdline
> +Date:		August 2013
> +KernelVersion:	3.11
> +Contact:	Sudeep Dutt <sudeep.dutt@...el.com>
> +Description:
> +		An Intel MIC device runs a Linux OS during its operation. Before
> +		booting this card OS, it is possible to pass kernel command line
> +		options to configure various features in it, similar to
> +		self-bootable machines. When read, this entry provides
> +		information about the current kernel command line options set to
> +		boot the card OS. This entry can be written to change the
> +		existing kernel command line options. Typically, the user would
> +		want to read the current command line options, append new ones
> +		or modify existing ones and then write the whole kernel command
> +		line back to this entry.

Is a PAGE_SIZE value going to be big enough for your command line?  I
know some embedded systems have horribly long command lines, hopefully
this will be enough for you.

thanks,

greg k-h
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