This was tested on a 4 socket bare-metal machine with 48 cores. Patch tracks when migration failures occur and slows the PTE scanner. Trapping at exactly the time we know that migrations cannot happen. This means there is higher system CPU overhead and fault However, if migrations failįor any reason then the PTE scanner may scan faster if the faults continue Normally, the scan rate is tuned on a per-taskīasis depending on the locality of faults. This is showing excessive migration activity even though excessive migrationsĪre meant to get throttled. Straight at the cause - this is from 4.0-rc1 on the '-o bhash=101073' config: Is far worse when using the large memory footprint configs.

List-Id: Linux on PowerPC Developers Mail ListĬontent-Type: text/plain charset='utf-8'Īcross the board the 4.0-rc1 numbers are much slower, and the degradation

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