On Tue, Apr 20, 2021 at 11:10:03AM +0200, Michal Hocko wrote: > On Tue 20-04-21 11:51:05, Mike Rapoport wrote: > > From: Mike Rapoport <rppt@xxxxxxxxxxxxx> > > Some trivial changelog would be better than nothing. oh, sure. > > Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> > > But I do agree that this is a useful information to have in the > documentation. Having networking counters as an example is helpful as > well. I am not familiar with those myself much and I do remember there > is much to it than just sockstat. It would be great to consult this with > some networking expert and extend the documentation for that case which > tends to be quite common AFAIK. I've found a citation from one of Eric Dumazet's emails [1], and used that instead: ... subsystem specific interfaces, for instance /proc/net/sockstat for TCP memory allocations [1] https://lore.kernel.org/lkml/CANn89iKprp7WYeZy4RRO5jHykprnSCcVBc7Tk14Ui_MA9OK7Fg@xxxxxxxxxxxxxx > Anyway this is already an improvement and a step into the right > direction. > > Acked-by: Michal Hocko <mhocko@xxxxxxxx> > > one nit below > > --- > > Documentation/filesystems/proc.rst | 11 +++++++++-- > > 1 file changed, 9 insertions(+), 2 deletions(-) > > > > diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst > > index 48fbfc336ebf..bf245151645b 100644 > > --- a/Documentation/filesystems/proc.rst > > +++ b/Documentation/filesystems/proc.rst > > @@ -929,8 +929,15 @@ 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 is may happen > > that it may happen Right. > > +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 networking > > +buffers. > > + > > +The following is from a 16GB PIII, which has highmem enabled. > > +You may not have all of these fields. > > > > :: > > > > -- > > 2.29.2 > > -- > Michal Hocko > SUSE Labs -- Sincerely yours, Mike.
