Re: [RFC PATCH 1/1] vmalloc: add test driver to analyse vmalloc allocator

[Michal Hocko]

On Thu 15-11-18 00:46:42, Matthew Wilcox wrote:
> On Thu, Nov 15, 2018 at 09:39:57AM +0100, Michal Hocko wrote:
> > On Wed 14-11-18 15:00:53, Andrew Morton wrote:
> > > #define EXPORT_SYMBOL_SELFTEST EXPORT_SYMBOL_GPL
> > >
> > > then write a script which checks the tree for usages of the
> > > thus-tagged symbols outside tools/testing and lib/ (?)
> > 
> > and then yell at people? We can try it out of course. The namespace
> > would be quite clear and we could document the supported usage pattern.
> > We also want to make EXPORT_SYMBOL_SELFTEST conditional. EXPORTs are not
> > free and we do not want to add them if the whole testing infrastructure
> > is disabled (assuming there is a global one for that).
> 
> How about adding
> 
> #ifdef CONFIG_VMALLOC_TEST
> int run_internal_vmalloc_tests(void)
> {
> ...
> }
> EXPORT_SYMBOL_GPL(run_internal_vmalloc_tests);
> #endif
> 
> to vmalloc.c?  That would also allow calling functions which are marked
> as static, not just functions which aren't exported to modules.

Yes that would be easier but do we want to pollute the normal code with
testing? This looks messy to me.

-- 
Michal Hocko
SUSE Labs