[Tmem-devel] tmem how to get current usage in megabytes?

[Vasiliy G Tolstov]

On Wed, 2010-08-18 at 15:28 -0700, Dan Magenheimer wrote:
> > > I would first try increasing the size of your guest
> > > swap disk (or, if easier, adding a second much larger
> > > swap disk) to see if it helps.
> 
> By the way, note that a second swap disk can be a large
> size to the guest but, if your dom0 distro supports it,
> can be backed with a sparse file.  If frontswap doesn't
> "fill up", the backend sparse swapfile will rarely be
> used.
> 

What i need to support sparse swa files? I can create sparse file and do
mkswap, but swapon command says that file has holes and do nothing.

> > > There are also a number of "tunables" for selfballooning
> > > and frontswap-selfshrinking that can be adjusted in
> > > /sys/devices/system/xen_memory/xen_memory0/*
> > > including a min_target_kb that will limit the lower
> > > limit that selfballooning will target.
> > 
> > I think we use various versions of patches becouse i do not have
> > min_target_kb , but have target_kb, if i try to write small value -
> > memory is shrinking. But You say, that the current version of patch do
> > the shrinking automatik in kernel, where i can find this version of
> > patch?
> 
> The patch you sent me has min_target_kb (search for
> it in the patch) and does selfballooning in the kernel.
> Maybe you are not running the kernel you built?  Or
> maybe you did not enable CONFIG_XEN_SELFBALLOONING
> when you built it?
> 

It enabled like frontswap and cleancache.

> > I think i have mistake in my patch. Can you check my patch that i send?
> 
> I looked it over quickly and it looked OK to me.  There
> is a bug fix or two I've made on top of RHEL6 beta2, but
> haven't yet applied it to the various beta2 updates that
> Red Hat has already made (and I'm falling further behind).
> 
> Dan
> 

I found some mistakes in other patches (i'm use opensuse for tests and
it have many xen related patches and tmem patch of older version when i
use), i'm try to remove unused parts of patches and compile it now...

-- 
Vasiliy G Tolstov <v.tolstov at selfip.ru>
Selfip.Ru