[PATCHv5 4/8] zswap: add to mm/

Dan Magenheimer dan.magenheimer at oracle.com
Mon Feb 18 19:55:50 UTC 2013


> From: Seth Jennings [mailto:sjenning at linux.vnet.ibm.com]
> Subject: Re: [PATCHv5 4/8] zswap: add to mm/
> 
> On 02/15/2013 10:04 PM, Ric Mason wrote:
> > On 02/14/2013 02:38 AM, Seth Jennings wrote:
> <snip>
> >> + * The statistics below are not protected from concurrent access for
> >> + * performance reasons so they may not be a 100% accurate.  However,
> >> + * the do provide useful information on roughly how many times a
> >
> > s/the/they
> 
> Ah yes, thanks :)
> 
> >
> >> + * certain event is occurring.
> >> +*/
> >> +static u64 zswap_pool_limit_hit;
> >> +static u64 zswap_reject_compress_poor;
> >> +static u64 zswap_reject_zsmalloc_fail;
> >> +static u64 zswap_reject_kmemcache_fail;
> >> +static u64 zswap_duplicate_entry;
> >> +
> >> +/*********************************
> >> +* tunables
> >> +**********************************/
> >> +/* Enable/disable zswap (disabled by default, fixed at boot for
> >> now) */
> >> +static bool zswap_enabled;
> >> +module_param_named(enabled, zswap_enabled, bool, 0);
> >
> > please document in Documentation/kernel-parameters.txt.
> 
> Will do.

Is that a good idea?  Konrad's frontswap/cleancache patches
to fix frontswap/cleancache initialization so that backends
can be built/loaded as modules may be merged for 3.9.
AFAIK, module parameters are not included in kernel-parameters.txt.

Dan



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