Messages in this thread | | | Date | Fri, 5 Jan 2001 15:14:08 -0200 (BRDT) | From | Rik van Riel <> | Subject | MM/VM todo list |
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Hi,
here is a TODO list for the memory management area of the Linux kernel, with both trivial things that could be done for later 2.4 releases and more complex things that really have to be 2.5 things.
Most of these can be found on http://linux24.sourceforge.net/ too
Trivial stuff: * VM: better IO clustering for swap (and filesystem) IO * Marcelo's swapin/out clustering code * ->writepage() IO clustering support * page_launder()/->writepage() working together in avoiding low-yield (small cluster) IO at first, ... * VM: include Ben LaHaise's code, which moves readahead to the VMA level, this way we can do streaming swap IO, complete with drop_behind() * VM: enforce RSS ulimit
Probably 2.5 era: * VM: physical->virtual reverse mapping, so we can do much better page aging with less CPU usage spikes * VM: move all the global VM variables, lists, etc. into the pgdat struct for better NUMA scalability * VM: per-node kswapd for NUMA * VM: thrashing control, maybe process suspension with some forced swapping ? (trivial only in theory) * VM: experiment with different active lists / aging pages of different ages at different rates + other page replacement improvements * VM: Quality of Service / fairness / ... improvements
Additions to this list are always welcome, I'll put it online on the Linux-MM pages (http://www.linux.eu.org/Linux-MM/) soon.
regards,
Rik -- Virtual memory is like a game you can't win; However, without VM there's truly nothing to loose...
http://www.surriel.com/ http://www.conectiva.com/ http://distro.conectiva.com.br/
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