[MM TODO list, updated for october 2000]
--- Here is the TODO list for the new VM. The only thing really needed for 2.4 is the OOM handler and a fix for the highmem deadlock.The page->mapping->flush() callback is really wanted by the journaling filesystem folks.
The rest are mostly extra's that would be nice; these things won't be pushed for inclusion except if it turns out to be really trivial to implement, high performance on the cases they're supposed to affect and their influence is highly localised...
(sorry folks, but for 2.4 I'll be really conservative)
---> TODO list for the new VM <---
for kernel 2.4, necessary: - out of memory handling [integrate the OOM killer, 10 minutes work] - fix the highmem deadlock, where the swapper cannot create low memory bounce buffers OR swap out low memory because it has consumed all resources [old bug, already reported with 2.4.0-test6, probably before]
for kernel 2.4, really wanted: - page->mapping->flush() callback in page_launder(), for easier integration with journaling filesystems and maybe the network filesystems [about 30 minutes of work on the VM side]
for kernel 2.4, wanted: - maybe rebalance the swapper a bit ... we do page aging now so maybe refill_inactive_scan() / shm_swap() and swap_out() need to be rebalanced a bit
for kernel 2.5: (maybe available as patch for 2.4 ???) - physical->virtual reverse mapping, so we can do much better page aging with less CPU usage spikes - better IO clustering for swap (and filesystem) IO - move all the global VM variables, lists, etc. into the pgdat struct for better NUMA scalability - (maybe) some QoS things, as far as they are major improvements with minor intrusion - thrashing control, maybe process suspension with some forced swapping ? - include Ben LaHaise's code, which moves readahead to the VMA level, this way we can do streaming swap IO, complete with drop_behind()
regards,
Rik -- "What you're running that piece of shit Gnome?!?!" -- Miguel de Icaza, UKUUG 2000
http://www.conectiva.com/ http://www.surriel.com/
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Oct 07 2000 - 21:00:10 EST