Re: [PATCH v6 2/8] hugetlb: restructure pool allocations

[Mike Kravetz <mike.kravetz@oracle.com>]

On 09/27/23 13:26, Konrad Dybcio wrote:
> 
> 
> On 26.09.2023 01:48, Mike Kravetz wrote:
> > Allocation of a hugetlb page for the hugetlb pool is done by the routine
> > alloc_pool_huge_page.  This routine will allocate contiguous pages from
> > a low level allocator, prep the pages for usage as a hugetlb page and
> > then add the resulting hugetlb page to the pool.
> > 
> > In the 'prep' stage, optional vmemmap optimization is done.  For
> > performance reasons we want to perform vmemmap optimization on multiple
> > hugetlb pages at once.  To do this, restructure the hugetlb pool
> > allocation code such that vmemmap optimization can be isolated and later
> > batched.
> > 
> > The code to allocate hugetlb pages from bootmem was also modified to
> > allow batching.
> > 
> > No functional changes, only code restructure.
> > 
> > Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
> > Reviewed-by: Muchun Song <songmuchun@bytedance.com>
> > ---
> Hi, looks like this patch prevents today's next from booting
> on at least one Qualcomm ARM64 platform. Reverting it makes
> the device boot again.

Can you share the config used and any other specific information such as
kernel command line.

I can not reproduce on the arm64 platforms I have.  Been trying various
config combinations without success.  Although, there are lots of
possibilities.  Also, taking a closer look at the changes.  So far,
nothing is obvious.
-- 
Mike Kravetz