On Fri 30-12-16 12:36:20, Mel Gorman wrote: [...] > I'll neither ack nor nak this patch. However, I would much prefer an > additional option be added to sysfs called defer-fault that would avoid > all fault-based stalls but still potentially stall for MADV_HUGEPAGE.
Would you consider changing the semantic of defer=madvise to invoke KSWAPD for !madvised vmas as acceptable. It would be a change in semantic but I am wondering what would be a risk and potential regression space. Also I am planning to send a pro-active compaction based on a "watermark" as an LSF/MM topic proposal. I suspect that no additional thp specific tunable will be needed if we have a proper compaction watermark tunable. -- Michal Hocko SUSE Labs
