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SubjectRe: [patch] paravirt: VDSO page is essential
Roland McGrath wrote:
> For everything else to work, it needs to be set by changing __FIXADDR_TOP,
> which seems to be done by calling reserve_top_address early enough.
> It looks like that needs to be properly tied into paravirt_ops somehow.

The startup code for whatever hypervisor you're running makes a call to
reserve_top to reserve the appropriate amount of address space. This
happens very early.

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