On Tue, Apr 19, 2016 at 12:18:01PM +0200, Samuel Thibault wrote: > The last remark makes me think that the performance issue being raised > is in the kernel, not in userland.
I expect it's the VP table backing the page cache. I'm currently continuing Justus' work in the last GSoC to back VM objects with radix trees, which involves turning a lot of simple locks into general locks, so it's a bit tricky. -- Richard Braun