Re: [Qemu-devel] qemu and transparent huge pages

[Avi Kivity]

On 08/15/2012 03:45 PM, Michael Tokarev wrote:
> 
> But apparently, THP does not work still, even with 2Mb
> alignment: when running a guest, AnonHugePages in
> /proc/meminfo stays at 0 - either in kvm mode or in tcg
> mode.  Any idea why?  What else is needed for THP to work?

It does for me:

AnonHugePages:    368640 kB

Note the patch you reference doesn't impact thp, just kvm's ability to
propagate them to the shadow page table.

> 
> This is quite a frequent question in #kvm IRC channel,
> and I always suggested using -mem-path for this,  but
> I'm curios why it doesn't work automatically when it
> probably should?
> 

Please provide extra info, like the setting of
/sys/kernel/mm/transparent_hugepage/enabled.


-- 
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