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Added note about CONFIG_UBC_KEEP_UNUSED=y as mentioned in the mailing list
The problem here is tcp time wait buckets can still there after a VE is stopped. You can check that by seeing the <code>held</code> column for <code>kmemsize</code> parameter. If it is not zero, that means you have to wait about 5 minutes in order to time wait buckets to expire, and the corresponding beancounter to be uncharged.
If you still see failcnt not reset to 0 after more than 5 minutes after VE is stopped, your kernel was likely compiled with CONFIG_UBC_KEEP_UNUSED=y, and in that case you'll have to switch off this option if you want to reset beancounters when VE is restarted. If you're sure your kernel was NOT compiled with the above option and it's not resetting failcnt after 5 minutes, it means there is a bug in UBC code. Please file a detailed [[bug report]] to [http://bugzilla.openvz.org bugzilla.openvz.org]
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