Howard Chu wrote:
Howard Chu wrote:
Howard Chu wrote:
2 questions:
why is there data in the FS cache that isn't owned by (the mmap of) the
process that caused it to be paged in in the first place?
is there a tunable knob to discourage the page cache from stealing from
the
process?
This Unmapped page cache control http://lwn.net/Articles/436010/ sounds like
it might have been helpful here. I.e., having a way to prioritize so that
unmapped cache pages get reclaimed in preference to mapped pages could help.
Though I still don't understand why these pages in the cache aren't mapped in
the first place.
As implied by this post
http://lkml.indiana.edu/hypermail/linux/kernel/0701.3/0354.html setting
swappiness to 0 seems to give the desired effect of preventing mapped pages
from being reclaimed.
I spoke too soon, after a few minutes of load the process size started
shrinking again. My original questions still stand.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
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