Re: [PATCH v2] docs: proc.rst: meminfo: briefly describe gaps in memory accounting

On Tue, Apr 20, 2021 at 03:57:07PM +0200, Michal Hocko wrote:

On Tue 20-04-21 14:24:30, Matthew Wilcox wrote:

quoted

On Tue, Apr 20, 2021 at 03:13:54PM +0300, Mike Rapoport wrote:

quoted

Add a paragraph that explains that it may happen that the counters in
/proc/meminfo do not add up to the overall memory usage.

... that is, the sum may be lower because memory is allocated for other
purposes that is not reported here, right?

yes. Many direct page allocator users are not accounted in any of the
existing counters.

Does virtio_balloon dereserve special mention?

From inside VM memory borrowing looks like one giant memory leak resulting
in support tickets (not that people who file them read internal kernel
documentation...)