[Openais] [Corosync] The corosync shared memory keeps increasing

[hj lee]

Hi,

I tried the latest version corosync 1.2.7 rpms from clusterlabs. The problem
is still there. Actually the latest version gets worse. In old 1.1.2
version, the shared memory increases only when cib exachanges messages
through corosync. In the 1.2.7 version, corosync shared memory keeps
increasing even when the cluster is idle. Simply run the corosync and watch
the memory in the top every a few minutes, the shared memory just keeps
increasing. Isn't this a memory leak?

1. Shared memory increases when the cluster is idle. I highly suspect it
leak comes from circular mmap in logsys.c.
[root at silverthorne4 epel]# top -b -n1 | egrep "coro|cib|attrd"
16579 root      RT   0  207m 4200 1920 S  0.0  0.1   0:00.07 corosync
16587 hacluste  -8   0 69044 4536 2544 S  0.0  0.1   0:00.35 cib
16589 hacluste  -8   0 69808 2436 2024 S  0.0  0.1   0:00.00 attrd
---- after a few minutes later
[root at silverthorne4 epel]# top -b -n1 | egrep "coro|cib|attrd"
16579 root      RT   0  207m 4212 1932 S  0.0  0.1   0:00.07 corosync
16587 hacluste  -8   0 69044 4536 2544 S  0.0  0.1   0:00.35 cib
16589 hacluste  -8   0 69808 2436 2024 S  0.0  0.1   0:00.00 attrd


2. Shared memory increases whenever pacemaker resource is started or
stopped. In this case, cib's shared memory also increases. I highly suspect
this leak comes from mmap in corosync ipc code.
[root at silverthorne4 epel]# top -b -n1 | egrep "coro|cib|attrd"
16579 root      RT   0  207m 4316 2036 S  0.0  0.1   0:00.11 corosync
16587 hacluste  -8   0 69048 4596 2584 S  0.0  0.1   0:00.39 cib
16589 hacluste  -8   0 69808 2436 2024 S  0.0  0.1   0:00.00 attrd

[root at silverthorne4 epel]# crm resource stop faultymon-clone

[root at silverthorne4 epel]# top -b -n1 | egrep "coro|cib|attrd"
16579 root      RT   0  207m 4336 2056 S  0.0  0.1   0:00.13 corosync
16587 hacluste  -8   0 69068 4620 2596 S  0.0  0.1   0:00.41 cib
16589 hacluste  -8   0 69808 2436 2024 S  0.0  0.1   0:00.00 attrd

Thanks
hj

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