On 09/17/2018 07:29 AM, Thomas Gleixner wrote: > To avoid excessive 4k wise checks in the common case do a quick check first > whether the requested new page protections conflict with a static > protection area in the large page. If there is no conflict then the > decision whether to preserve or to split the page can be made immediately. > > If the requested range covers the full large page, preserve it. Otherwise > split it up. No point in doing a slow crawl in 4k steps.
That's the big one... Reviewed-by: Dave Hansen <[email protected]>
