RE: [PATCHv11 3/4] zswap: add to mm/

[Dan Magenheimer <dan.magenheimer@oracle.com>]

> From: Rik van Riel [mailto:riel@redhat.com]
> Sent: Wednesday, May 15, 2013 4:15 PM
> To: Dan Magenheimer
> Cc: Seth Jennings; Andrew Morton; Greg Kroah-Hartman; Nitin Gupta; Minchan Kim; Konrad Wilk; Robert
> Jennings; Jenifer Hopper; Mel Gorman; Johannes Weiner; Larry Woodman; Benjamin Herrenschmidt; Dave
> Hansen; Joe Perches; Joonsoo Kim; Cody P Schafer; Hugh Dickens; Paul Mackerras; linux-mm@kvack.org;
> linux-kernel@vger.kernel.org; devel@driverdev.osuosl.org
> Subject: Re: [PATCHv11 3/4] zswap: add to mm/
> 
> On 05/14/2013 04:18 PM, Dan Magenheimer wrote:
> 
> > It's unfortunate that my proposed topic for LSFMM was pre-empted
> > by the zsmalloc vs zbud discussion and zswap vs zcache, because
> > I think the real challenge of zswap (or zcache) and the value to
> > distros and end users requires us to get this right BEFORE users
> > start filing bugs about performance weirdness.  After which most
> > users and distros will simply default to 0% (i.e. turn zswap off)
> > because zswap unpredictably sometimes sucks.
> 
> I'm not sure we can get it right before people actually start
> using it for real world setups, instead of just running benchmarks
> on it.
> 
> The sooner we get the code out there, where users can play with
> it (even if it is disabled by default and needs a sysfs or
> sysctl config option to enable it), the sooner we will know how
> well it works, and what needs to be changed.

/me sets stage of first Star Wars (1977)

/me envisions self as Obi-Wan Kenobi, old and tired of fighting,
in lightsaber battle with protege Darth Vader / Anakin Skywalker

/me sadly turns off lightsaber, holds useless handle at waist,
takes a deep breath, and promptly gets sliced into oblivion.

Time for A New Hope(tm).

(/me cc's Jon Corbet for a longshot last chance of making LWN's
Kernel Development Quotes of the Week.)

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