commit 3b47bfc4f83363f5a473ab71e6219ad84ebc6b77
Author: Matthew Dillon <[email protected]>
Date: Sat Mar 2 17:11:19 2013 -0800
kernel - Make VM fault waits in low memory the same as other low memory
waits
* Nominal memory allocations, particularly by tmpfs, allow allocations
down to the 'min' before waiting for memory to recover to 'target'.
The VM fault code required memory to be at or above the 'target'
at all times. This led to extreme starvation because other
user-accessible
subsystems could force free memory to remain below 'target'.
* Change the VM code to use substantially the same down-to 'min' and
recover-to 'target' parameters that other subsystems use. This
should reduce the excessive stalls under low memory conditions.
* Rename vm_waitpfault() to vm_wait_pfault() to conform with other
naming schemes in the same API.
Summary of changes:
sys/vm/vm_fault.c | 4 ++--
sys/vm/vm_page.c | 18 ++++++++++--------
sys/vm/vm_pageout.h | 2 +-
3 files changed, 13 insertions(+), 11 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/3b47bfc4f83363f5a473ab71e6219ad84ebc6b77
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DragonFly BSD source repository
