Hi
The /dev/mem_notify is low memory notification device.
it can avoid swappness and oom by cooperationg with the user process.
You need not be annoyed by OOM any longer :)
please any comments!
patch list
[1/8] introduce poll_wait_exclusive() new API
[2/8] introduce wake_up_locked_nr() new API
[3/8] introduce /dev/mem_notify new device (the core of this patch
series)
[4/8] memory_pressure_notify() caller
[5/8] add new mem_notify field to /proc/zoneinfo
[6/8] (optional) fixed incorrect shrink_zone
[7/8] ignore very small zone for prevent incorrect low mem notify.
[8/8] support fasync feature
related discussion:
--------------------------------------------------------------
LKML OOM notifications requirement discussion
http://www.gossamer-threads.com/lists/linux/kernel/832802?nohighlight=1#832802
OOM notifications patch [Marcelo Tosatti]
http://marc.info/?l=linux-kernel&m=119273914027743&w=2
mem notifications v3 [Marcelo Tosatti]
http://marc.info/?l=linux-mm&m=119852828327044&w=2
Thrashing notification patch [Daniel Spang]
http://marc.info/?l=linux-mm&m=119427416315676&w=2
mem notification v4 [kosaki]
http://marc.info/?l=linux-mm&m=120035840523718&w=2
Changelog
-------------------------------------------------
v4 -> v5 (by KOSAKI Motohiro)
o rebase to 2.6.24-rc8-mm1
o change display order of /proc/zoneinfo
o ignore very small zone
o support fcntl(F_SETFL, FASYNC)
o fix some trivial bugs.
v3 -> v4 (by KOSAKI Motohiro)
o rebase to 2.6.24-rc6-mm1
o avoid wake up all.
o add judgement point to __free_one_page().
o add zone awareness.
v2 -> v3 (by Marcelo Tosatti)
o changes the notification point to happen whenever
the VM moves an anonymous page to the inactive list.
o implement notification rate limit.
v1(oom notify) -> v2 (by Marcelo Tosatti)
o name change
o notify timing change from just swap thrashing to
just before thrashing.
o also works with swapless device.
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