linux-kernel - Re: [PATCH 4/5] zram: Simplify zram disk resizing interface

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Date:	Fri, 9 Sep 2011 17:41:38 -0700
From:	Greg KH <greg@...ah.com>
To:	Nitin Gupta <ngupta@...are.org>
Cc:	Jerome Marchand <jmarchan@...hat.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	Linux Driver Project <devel@...uxdriverproject.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/5] zram: Simplify zram disk resizing interface

On Fri, Sep 09, 2011 at 08:12:49PM -0400, Nitin Gupta wrote:
> On 09/09/2011 07:11 PM, Greg KH wrote:
> 
> > "simplify" it in what way?
> > 
> > What just got changed, and why, and did it just break any documentation?
> > 
> 
> 
> Its simplification in the sense that earlier we had to be pass total RAM
> size in bytes when setting zram disksize using zram_set_disksize()
> which is not intuitive.  The replaced version instead just requires
> the new size to be set which seems to make more sense.

Then why not mention that?

Is there some character limit in the changelog comment section that I
don't know about?  :)

Please, be much more descriptive so we have a chance to know what is
going on.

> The first message is no longer required since we now set some default
> value (25% of RAM) instead of zero. So, if user doesn't provide any
> disksize value, we use the default.
> 
> The second message really doesn't belong in a kernel driver. That's more
> of a documentation or user commonsense thing.  If a user really thinks
> that the data to be written is going to be highly compressible, setting
> zram to such large value makes some sense and there is little point in
> throwing out this big warning in system logs.

Again, put this in the changelog...

greg k-h
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