Comment 118 for bug 1573062

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Balbir Singh (bsingharora) wrote : Re: memory_stress_ng failing for IBM Power S812LC(TN71-BP012) for 16.04

These logs are something I've not seen here in my testing. This shows that we are stuck doing an up_write() on root->rwsem in the anon_vma path. It looks like we are contending on the rwsem's sem->wait_lock. I don't have a reproduction of this issue, it will be interesting to examine what is causing the heavy contention