[linux-mm-cc] First experience of compressed cache
Nai Xia
nai.xia at gmail.com
Mon Mar 31 13:29:56 EDT 2008
On Tue, Apr 1, 2008 at 12:47 AM, John McCabe-Dansted <gmatht at gmail.com> wrote:
> On Mon, Mar 31, 2008 at 11:59 PM, Baghdadi Riyadh <baghdadi13 at gmail.com> wrote:
> > so if you have another way to resize the compCache it would be great :)
>
> Instead of resizing /dev/ramzswap0, we could resize the amount ram
> ramzswap0 uses by getting compcache itself to manage the physical
> swap.
>
> That is, instead of doing:
> modprobe compache
> swapon /dev/ramzswap0
> swapon /dev/sdaX
>
> We'd do something like
> modprobe compache physswap=/dev/sdaX
> swapon /dev/ramzswap0
>
> Then compcache could decide whether it wants to store swap in memory
> or on disk. To the kernel, compcache would still look like a generic
> swap device.
Oh, yes,
that's the point in my second letter. :-)
Let the compache act as an intermediate layer between ram and hard disk swap.
And that's also why I feel eager to patch the kernel,
it seems directly related to the page cache and swap cache.
>
>
> > John used the CompCache on Ubuntu LiveCd with (I think) 90% of RAM and
>
> Minimum of 150% of ram and 300MB atm (so under 75% of ram used,
> assuming 2:1 compression ratio).
>
> --
>
>
> John C. McCabe-Dansted
> PhD Student
> University of Western Australia
>
Best Regards,
Nai
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