Shared memory is less available than buffers, so move it
left next to used memory.
This is in preparation for including shared memory in the
basic "in use" for the bar text. It would not make sense
to sum a discontiguous region.
For now, the semantics are mostly fit for Linux zswap subsystem. For
instance, we add the third swap usage metric that indicates the amount
of memory that is accounted to swap but in fact stored elsewhere. This
exactly matches the definition of frontswap/zswap, and is probably of
little use to all other platforms.
Reasoning:
- implementation was unsound -- broke down when I added a fairly
basic macro definition expanding to a struct initializer in a *.c
file.
- made it way too easy (e.g. via otherwise totally innocuous git
commands) to end up with timestamps such that it always ran
MakeHeader.py but never used its output, leading to overbuild noise
when running what should be a null 'make'.
- but mostly: it's just an awkward way of dealing with C code.
Kevin Bracey
Ivan Shapovalov
Benny Baumann
Guillaume Gomez
Daniel Lange
mayurdahibhate
Christian Göttsche
Zev Weiss
Hisham Muhammad