[PATCH v3 0/4] mm: fix the "counter.sh" failure for libhugetlbfs
Huang Shijie
shijie.huang at arm.com
Tue Dec 6 02:03:59 PST 2016
On Mon, Dec 05, 2016 at 05:31:01PM +0800, Michal Hocko wrote:
> On Mon 05-12-16 17:17:07, Huang Shijie wrote:
> [...]
> > The failure is caused by:
> > 1) kernel fails to allocate a gigantic page for the surplus case.
> > And the gather_surplus_pages() will return NULL in the end.
> >
> > 2) The condition checks for some functions are wrong:
> > return_unused_surplus_pages()
> > nr_overcommit_hugepages_store()
> > hugetlb_overcommit_handler()
>
> OK, so how is this any different from gigantic (1G) hugetlb pages on
I think there is no different from gigantic (1G) hugetlb pages on
x86_64. Do anyone ever tested the 1G hugetlb pages in x86_64 with the "counter.sh"
before?
> x86_64? Do we need the same functionality or is it just 32MB not being
> handled in the same way as 1G?
Yes, we need this functionality for gigantic pages, no matter it is
X86_64 or S390 or arm64, no matter it is 32MB or 1G. :)
But anyway, I will try to find some machine and try the 1G gigantic page
on ARM64.
Thanks
Huang Shijie
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