[rrd-users] FreeBSD memory leak in fadvise

[Steven Hartland]

Just wanted to give people a heads up about a kernel memory leak
in FreeBSD's fadvise that effects users of rrdtool as it uses
this function.

If your on 8.3-RELEASE and use rrdtool then your likely
effected by this issue and should either upgrade to 8-STABLE or
compile you kernel with the fix introduced by svn r234661 which
can be found here:-
http://svnweb.freebsd.org/base?view=revision&revision=234661

If you want to check if you are affected the following will tell
you:-
vmstat -m | grep fadvise

If you see a large number listed your effected by this leak.

If you combine this with ZFS you can end up with a machine that
hard locks when it runs low on kva so hope this helps :)

    Regards
    Steve

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