[Lxc-users] regarding unreclaimable memory

[Kalyana sundaram]

Hey
I have a host machine and 4 lxc containers. All running centos 6.3
Containers use macvlan to connect to internet
I face improper memory usage.
free mem is way less than rss+cache
Sunreclaim keeps on increasing until reboot due to out of memory
slabtop shows skbuf_fclone_cache and size-1024 on top
This issue didnt arise when I networked with veth
Is it  a known macvlan issue. Has anybody seen it?

Attached slabtop

2916048 2916036  99%    1.00K 729012        4   2916048K size-1024
2911454 2911411  99%    0.50K 415922        7   1663688K skbuff_fclone_cache
808302 274396  33%    0.10K  21846       37     87384K buffer_head
752958 752175  99%    0.06K  12762       59     51048K size-64
 47096  41819  88%    0.55K   6728        7     26912K radix_tree_node
 22144  21877  98%    1.00K   5536        4     22144K ext4_inode_cache
   191    191 100%   32.12K    191        1     12224K kmem_cache
 45467  35182  77%    0.20K   2393       19      9572K vm_area_struct


Increase in Sunreclaim(every 5 min)

SUnreclaim:       769328 kB
SUnreclaim:       799164 kB
SUnreclaim:       823452 kB
SUnreclaim:       847036 kB
SUnreclaim:       878128 kB
SUnreclaim:       913528 kB
SUnreclaim:       947668 kB
SUnreclaim:       968784 kB
SUnreclaim:       993684 kB
SUnreclaim:      1011104 kB
SUnreclaim:      1039284 kB
SUnreclaim:      1074544 kB
SUnreclaim:      1106648 kB
SUnreclaim:      1135972 kB
SUnreclaim:      1161156 kB
SUnreclaim:      1188600 kB
SUnreclaim:      1219648 kB
SUnreclaim:      1252076 kB
SUnreclaim:      1284112 kB
SUnreclaim:      1307688 kB
SUnreclaim:      1327252 kB
SUnreclaim:      1350108 kB
SUnreclaim:      1383520 kB
SUnreclaim:      1415300 kB
SUnreclaim:      1443100 kB
SUnreclaim:      1472260 kB
SUnreclaim:      1500496 kB
SUnreclaim:      1523360 kB
SUnreclaim:      1554776 kB
SUnreclaim:      1585040 kB
SUnreclaim:      1616256 kB
SUnreclaim:      1642824 kB
SUnreclaim:      1666240 kB
SUnreclaim:      1690380 kB
SUnreclaim:      1719528 kB
SUnreclaim:      1750676 kB
SUnreclaim:      1779768 kB
SUnreclaim:      1805580 kB
SUnreclaim:      1832656 kB
SUnreclaim:      1862188 kB
SUnreclaim:      1890892 kB
SUnreclaim:      1922048 kB
SUnreclaim:      1953140 kB
SUnreclaim:      1979448 kB
SUnreclaim:      2005736 kB
SUnreclaim:      2029240 kB
SUnreclaim:      2055284 kB
SUnreclaim:      2086112 kB






-- 
Kalyanasundaram
http://blogs.eskratch.com/
https://github.com/kalyanceg/
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