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SubjectRe: [PATCH] Gerd Hoffman's move-vsyscall-into-user-address-range patch

* Andrew Morton <akpm@osdl.org> wrote:

> Rusty Russell <rusty@rustcorp.com.au> wrote:
> >
> > Name: Move vsyscall page out of fixmap into normal vma as per mmap
>
> This causes mysterious hangs when starting init.
>
> Distro is RH FC1, running SysVinit-2.85-5.
>
> dmesg, sysrq-T and .config are at
> http://www.zip.com.au/~akpm/linux/patches/stuff/log-vmm - nothing leaps
> out.
>
> This is the second time recently when a patch has caused this machine
> to oddly hang in init. It's possible that there's a bug of some form
> in that version of init that we'll need to know about and take care of
> in some fashion.

FC1 is like really ancient. I think there was a glibc bug that caused
vsyscall related init hangs like that. To nevertheless let people run
their old stuff there's a vdso=0 boot option in exec-shield.

Ingo
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