On Fri, 20 Jul 2012 15:50:16 +0300 "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> wrote: > Clearing a 2MB huge page will typically blow away several levels of CPU > caches. To avoid this only cache clear the 4K area around the fault > address and use a cache avoiding clears for the rest of the 2MB area. > > It would be nice to test the patchset with more workloads. Especially if > you see performance regression with THP. > > Any feedback is appreciated. This all looks pretty sane to me. Some detail-poking from the x86 guys would be nice. What do other architectures need to do? Simply implement clear_page_nocache()? I believe that powerpc is one, not sure about others. Please update the changelogs to let arch maintainers know what they should do and cc those people on future versions? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>