Re: [PATCH] x86/mm: Enable 5-level paging support by default

* Dave Hansen wrote: > On 9/13/19 2:54 AM, Kirill A. Shutemov wrote: > > The next major release of distributions expected to have > > CONFIG_X86_5LEVEL=y. > > It's probably worth noting that this exposes to two kinds of possible > performance issues: > > First is the overhead of having the

Re: [PATCH] x86/mm: Enable 5-level paging support by default

On 9/13/19 2:54 AM, Kirill A. Shutemov wrote: > The next major release of distributions expected to have > CONFIG_X86_5LEVEL=y. It's probably worth noting that this exposes to two kinds of possible performance issues: First is the overhead of having the 5-level code on 4-level hardware. We

[PATCH] x86/mm: Enable 5-level paging support by default

Support of boot-time switching between 4- and 5-level paging mode is upstream since 4.17. We run internal testing with 5-level paging support enabled for a while and it doesn't not cause any functional or performance regression on 4-level paging hardware. The only 5-level paging related