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Re: [Qemu-devel] [Qemu-block] [PATCH v3 0/3] throttle: improve command-l


From: Greg Kurz
Subject: Re: [Qemu-devel] [Qemu-block] [PATCH v3 0/3] throttle: improve command-line parameter documentation
Date: Fri, 3 Mar 2017 08:01:01 +0100

On Fri, 3 Mar 2017 10:11:09 +0800
Stefan Hajnoczi <address@hidden> wrote:

> On Wed, Mar 01, 2017 at 10:27:48PM +0100, Greg Kurz wrote:
> > On Wed,  1 Mar 2017 11:50:23 +0000
> > Stefan Hajnoczi <address@hidden> wrote:
> >   
> > > v3:
> > >  * Added Patch 2 to fix invalid test parameters
> > >  * Switched to nicer max < avg check [Berto]
> > > v2:
> > >  * Fixed s/bps/iops/ copy-paste error in Patch 1 [Berto]
> > >  * Rephrased warning about guest hangs and errors [Berto]
> > >  * Added Patch 2 to hide the internal .max value from the monitor
> > > 
> > > Patch 1 fleshes out the documentation for I/O throttling command-line
> > > parameters.
> > > 
> > > Patch 2 hides an internal value that was being exposed to users via the
> > > monitor and caused confusion.
> > > 
> > > I ended up not adding QMP-style throttling.* names to the command-line
> > > documentation because the names are very long and unlikely to be used.  I
> > > couldn't see a nice way of adding them while still keeping the 
> > > documentation
> > > readable.
> > >   
> > 
> > I only see this series now and it's a bit unfortunate... throttling options
> > are now also available for fsdev. Only QMP-style names were added though,
> > and they appear in the documentation. I agree the names are long, and the
> > result isn't pretty on 80 columns, but it is readable still.
> > 
> > I don't really want to add code, just to have shorter names and a prettier
> > output. But it would be a good thing for fsdev to benefit from this new
> > documentation... any suggestion how to do that ?  
> 
> I think another patch series would be good to:
> 1. Document QMP-style names for -drive
> 2. Reference throttling parameter documention in a common place for both
>    -fsdev and -drive.
> 
> I'll do that.  This is QEMU 2.10 material anyway (it has missed the
> freeze deadline), so there's no time pressure.
> 
> Stefan

Sure. Please Cc me when you do that.

Thanks.

--
Greg

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