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Groups > linux.kernel > #1374073
| From | Andrew Cooper <andrew.cooper3@citrix.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [Xen-devel] Does __KERNEL_DS serve a purpose? |
| Date | 2016-04-08 10:20 +0200 |
| Message-ID | <rlzO2-Ty-27@gated-at.bofh.it> (permalink) |
| References | <rlste-3DX-47@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 08/04/2016 01:24, Andy Lutomirski wrote: > I can't see any reason that we need the __KERNEL_DS segment at all -- > I think that everything that uses __KERNEL_DS could use __USER_DS > instead. Am I missing anything? This has been bugging me for a > while. > > I mulled over this a bit when trying to understand the sysret_ss_attrs > bug and then forgot about it. Linux doesn't have a separate __KERNEL_SS. For the plain data segments, the dpl is not interesting. However, %ss is also loaded with __KERNEL_DS, and %ss.dpl is somewhat important. ~Andrew
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Does __KERNEL_DS serve a purpose? Andy Lutomirski <luto@kernel.org> - 2016-04-08 02:30 +0200
Re: [Xen-devel] Does __KERNEL_DS serve a purpose? Andrew Cooper <andrew.cooper3@citrix.com> - 2016-04-08 10:20 +0200
Re: [Xen-devel] Does __KERNEL_DS serve a purpose? Andy Lutomirski <luto@amacapital.net> - 2016-04-08 18:10 +0200
Re: [Xen-devel] Does __KERNEL_DS serve a purpose? Paolo Bonzini <pbonzini@redhat.com> - 2016-04-08 19:20 +0200
Re: [Xen-devel] Does __KERNEL_DS serve a purpose? Andy Lutomirski <luto@amacapital.net> - 2016-04-09 00:10 +0200
Re: [Xen-devel] Does __KERNEL_DS serve a purpose? Andrew Cooper <andrew.cooper3@citrix.com> - 2016-04-09 00:40 +0200
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