| Message ID | 20210421061127.1182723-1-rppt@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | [v3] docs: proc.rst: meminfo: briefly describe gaps in memory accounting | expand |
On Wed, Apr 21, 2021 at 09:11:27AM +0300, Mike Rapoport wrote: > From: Mike Rapoport <rppt@linux.ibm.com> > > 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@linux.ibm.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
On 4/21/21 8:11 AM, Mike Rapoport wrote: > From: Mike Rapoport <rppt@linux.ibm.com> > > 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@linux.ibm.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Thanks. > --- > v3: > * Add sentense about counters overlap > * Use wording suggested by Matthew > > v2: Link: https://lore.kernel.org/lkml/20210420121354.1160437-1-rppt@kernel.org > * Add brief changelog > * Fix typo > * Update example about network memory usage according to Eric's comment at > > https://lore.kernel.org/lkml/CANn89iKprp7WYeZy4RRO5jHykprnSCcVBc7Tk14Ui_MA9OK7Fg@mail.gmail.com > > v1: Link: https://lore.kernel.org/lkml/20210420085105.1156640-1-rppt@kernel.org > 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..0a07a5025571 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. Some of the counters reported > +here overlap. The memory reported by the non overlapping counters may 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. > > :: > >
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst index 48fbfc336ebf..0a07a5025571 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. Some of the counters reported +here overlap. The memory reported by the non overlapping counters may 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. ::