Fast gettimeofday(2) and static linking

Konstantin Belousov kostikbel at gmail.com
Mon Jan 28 15:55:35 UTC 2013


On Mon, Jan 28, 2013 at 04:45:17PM +0100, Marius Strobl wrote:
> On Fri, Jan 25, 2013 at 02:35:54PM +0200, Konstantin Belousov wrote:
> > Bruce Evans reported that statically linked binaries on HEAD an stable/9
> > use the syscall for gettimeofday(2) and clock_gettime(2). Apparently, this
> > is due to my use of the weak reference to the __vdso* symbols in the
> > libc implementations.
> > 
> > Patch below reworks the __vdso* attributes to only make the symbols
> > weak, but keep the references strong. Since I have to add a stub for
> > each architecture, I would like to ask non-x86 machines owners to test
> > the patch.
> > 
> 
> Hi Konstantin,
> 
> what's the appropriate way to test this?

Please rebuild the world with the patch and check that gettimeofday(2) still
works on your architecture, both for the static and dynamic binaries.
I think that just booting multiuser is enough.
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