Comment # 146 on bug 1112824 from
Obviously there is no silver bullet.  This is no single bug, but attributed by
different factors.  We couldn't address all of them so far, and it's enough to
cause the significant problem...

For TW, I guess the majority of regressions would be fixed by
CONFIG_VOLUNTARY_PREEMPTY and the user-space side fixes.  But there must be
many remaining machines that still suffer from the performance issue,
unfortunately.


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