Messages in this thread Patch in this message | | | From | Mike Rapoport <> | Subject | [PATCH v3] docs: proc.rst: meminfo: briefly describe gaps in memory accounting | Date | Wed, 21 Apr 2021 09:11:27 +0300 |
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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> --- 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. :: -- 2.29.2
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