On Tue, Apr 20, 2021 at 03:13:54PM +0300, Mike Rapoport wrote: > From: Mike Rapoport <rppt@xxxxxxxxxxxxx> > > Add a paragraph that explains that it may happen that the counters in > /proc/meminfo do not add up to the overall memory usage. > > Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> Ooops, forgot to add Michal's Ack, sorry. > --- > v2: > * Add brief changelog > * Fix typo > * Update example about network memory usage according to Eric's comment at > > https://lore.kernel.org/lkml/CANn89iKprp7WYeZy4RRO5jHykprnSCcVBc7Tk14Ui_MA9OK7Fg@xxxxxxxxxxxxxx > > v1: Link: https://lore.kernel.org/lkml/20210420085105.1156640-1-rppt@xxxxxxxxxx > > Documentation/filesystems/proc.rst | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst > index 48fbfc336ebf..8c77a491c436 100644 > --- a/Documentation/filesystems/proc.rst > +++ b/Documentation/filesystems/proc.rst > @@ -929,8 +929,14 @@ meminfo > ~~~~~~~ > > Provides information about distribution and utilization of memory. This > -varies by architecture and compile options. The following is from a > -16GB PIII, which has highmem enabled. You may not have all of these fields. > +varies by architecture and compile options. Please note that it may happen > +that the memory accounted here does not add up to the overall memory usage > +and the difference for some workloads can be substantial. In many cases there > +are other means to find out additional memory using subsystem specific > +interfaces, for instance /proc/net/sockstat for TCP memory allocations. > + > +The following is from a 16GB PIII, which has highmem enabled. > +You may not have all of these fields. > > :: > > -- > 2.29.2 > -- Sincerely yours, Mike.
