Re: [patch] mm, hugetlb: include hugepages in meminfo

From: David Rientjes
Date: Wed Mar 20 2013 - 14:46:20 EST

On Wed, 20 Mar 2013, Michal Hocko wrote:

> On Tue 19-03-13 17:18:12, David Rientjes wrote:
> > Particularly in oom conditions, it's troublesome that hugetlb memory is
> > not displayed. All other meminfo that is emitted will not add up to what
> > is expected, and there is no artifact left in the kernel log to show that
> > a potentially significant amount of memory is actually allocated as
> > hugepages which are not available to be reclaimed.
> Yes, I like the idea. It's bitten me already in the past.
> The only objection I have is that you print only default_hstate. You
> just need to wrap your for_each_node_state by for_each_hstate to do
> that. With that applied, feel free to add my
> Acked-by: Michal Hocko <mhocko@xxxxxxx>

I didn't do this because it isn't already exported in /proc/meminfo and
since we've made an effort to reduce the amount of information emitted by
the oom killer at oom kill time to avoid spamming the kernel log, I only
print the default hstate.
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