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Groups > linux.kernel > #1379375
| From | Andy Lutomirski <luto@amacapital.net> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base |
| Date | 2016-04-15 02:10 +0200 |
| Message-ID | <rnZuF-2eS-7@gated-at.bofh.it> (permalink) |
| References | <rfaIF-8aj-3@gated-at.bofh.it> <rfaIG-8aj-31@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Mar 21, 2016 at 9:16 AM, Andi Kleen <andi@firstfloor.org> wrote: > From: Andi Kleen <ak@linux.intel.com> > > Introduction: > > IvyBridge added four new instructions to directly write the fs and gs > 64bit base registers. Previously this had to be done with a system > call to write to MSRs. The main use case is fast user space threading > and switching the fs/gs registers quickly there. Another use > case is having (relatively) cheap access to a new address > register per thread. I'm queuing up a variant of this patch. I'll send it out for review when it's ready. --Andy
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Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Andy Lutomirski <luto@amacapital.net> - 2016-04-15 02:10 +0200
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