Messages in this thread | | | From | Andrew Lutomirski <> | Date | Fri, 12 Aug 2011 15:13:42 -0400 | Subject | Re: NACK! Re: [PATCH 4/4] Add vsyscalls to feature-removal-schedule.txt |
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On Fri, Aug 12, 2011 at 2:25 PM, Andi Kleen <andi@firstfloor.org> wrote: > Andy Lutomirski <luto@MIT.EDU> writes: > >> In a couple years, we'll see how well we've done at eradicating vsyscall-using >> binaries. Hopefully we can then disable them by default. We will probably >> have to leave the option to enable them around forever. > > NACK NACK NACK! >
It's already dropped from the version in tip/x86/vdso.
> this would break all old (old = meaning all today's) x86-64 installations.
Somewhat to my surprise, fully up-to-date Fedora 15 seems to work fine with vsyscall=none, and I wouldn't be terribly surprised if a few of the distributions starting making it the default sooner or later. I might do a followup patch to make the switch betweeen vsyscall=emulate and vsyscall=none work as a sysctl. (Switching from native to emulate at runtime could be problematic.)
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