Re: [PATCH v4 0/6] Micro-optimize vclock_gettime

From: Andi Kleen
Date: Mon May 16 2011 - 12:49:45 EST

> And unless you or someone else changes the primitive state of the
> kernel, framepointers are going to stay simply because removing them
> breaks profiling backtraces when the hit is inside vread().

This doesn't work anyways because the glibc stub code calling vgettimeofday
normally doesn't set up a frame pointer frame.

The only way to unwind there is dwarf2.

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