Re: [PATCH 3/3] compcache documentation

[Nitin Gupta]

Andrew Morton wrote:
> On Fri, 20 Mar 2009 19:44:08 +0530 Nitin Gupta <ngupta@xxxxxxxxxx> wrote:
>
> > ...
> >
> > +   backing_dev: This is block device to be used as backing store for compcache.
> > +	It must be a valid swap partition. We move data to this device when we
> > +	encounter incompressible page or memlimit is reached. TODO: we may also
> > +	move some pages from compcache to this device in case system is really
> > +	low on memory.
> > +	This device is not directly visible to kernel as a swap device
> > +	(/proc/swaps will only show /dev/ramzswap0 and not this device).
> > +	Managing this backing device is the job of compcache module.
>
> hrm, OK, it kinda/sorta/maybe might be a little bit like a "compressed
> cache".  But if someone comes up with a real compressed cache (ie:
> pagecache) then they'll want their name back.
Rename is in progress: compcache->ramzswap :)

> Also, the kernel already has a widespread and well-established "backing
> device" concept, in include/linux/backing-dev.h.  This new feature's
> poaching of that identifier is a bit confusing.  It would be nice to do a
> wholesale rename if possible.  secondary_dev?  nv_dev?

backing_swap?

Thanks,
Nitin
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/