Rik van Riel wrote:

Hi,

I am starting the process of adding more detailed instrumentation
to the VM subsystem and am wondering which statistics to add.
A quick start of things to measure are below, but I've probably
missed some things. Comments are welcome ...

Neat.

- bdflush wakeups
- pages written via page_launder's writepage by kswapd
- pages written via page_launder's writepage by non-PF_MEMALLOC
  tasks.  (ext3 has an interest in this because of nasty cross-fs
  reentrancy and journal overflow problems with writepage)
- shrink_icache call rate
- amount of stuff freed by shrink_icache
- ditto for shrink_dcache.
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