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[v3 9/9] s390: teach platforms not to zero struct pages memory

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If we are using deferred struct page initialization feature, most of
"struct page"es are getting initialized after other CPUs are started, and
hence we are benefiting from doing this job in parallel. However, we are
still zeroing all the memory that is allocated for "struct pages" using the
boot CPU.  This patch solves this problem, by deferring zeroing "struct
pages" to only when they are initialized on s390 platforms.

Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
---
 arch/s390/mm/vmem.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 9c75214..ffe9ba1 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -252,7 +252,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
 				void *new_page;
 
 				new_page = vmemmap_alloc_block(PMD_SIZE, node,
-							       true);
+							       VMEMMAP_ZERO);
 				if (!new_page)
 					goto out;
 				pmd_val(*pm_dir) = __pa(new_page) | sgt_prot;
-- 
1.7.1

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[v3 0/9] parallelized "struct page" zeroing Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-05-05 19:10 +0200
  [v3 8/9] powerpc: teach platforms not to zero struct pages memory Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-05-05 19:10 +0200
  [v3 9/9] s390: teach platforms not to zero struct pages memory Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-05-05 19:10 +0200
    Re: [v3 9/9] s390: teach platforms not to zero struct pages memory Heiko Carstens <heiko.carstens@de.ibm.com> - 2017-05-08 13:40 +0200
  [v3 1/9] sparc64: simplify vmemmap_populate Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-05-05 19:10 +0200
  Re: [v3 0/9] parallelized "struct page" zeroing Michal Hocko <mhocko@kernel.org> - 2017-05-09 20:20 +0200
    Re: [v3 0/9] parallelized "struct page" zeroing Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-05-09 21:00 +0200
      Re: [v3 0/9] parallelized "struct page" zeroing Michal Hocko <mhocko@kernel.org> - 2017-05-10 09:30 +0200
        Re: [v3 0/9] parallelized "struct page" zeroing Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-05-10 15:50 +0200
          Re: [v3 0/9] parallelized "struct page" zeroing Michal Hocko <mhocko@kernel.org> - 2017-05-10 17:00 +0200
            Re: [v3 0/9] parallelized "struct page" zeroing Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-05-10 17:10 +0200
              Re: [v3 0/9] parallelized "struct page" zeroing David Miller <davem@davemloft.net> - 2017-05-10 17:30 +0200
            Re: [v3 0/9] parallelized "struct page" zeroing David Miller <davem@davemloft.net> - 2017-05-10 17:20 +0200
              Re: [v3 0/9] parallelized "struct page" zeroing Matthew Wilcox <willy@infradead.org> - 2017-05-10 19:20 +0200
                Re: [v3 0/9] parallelized "struct page" zeroing David Miller <davem@davemloft.net> - 2017-05-10 20:10 +0200
                Re: [v3 0/9] parallelized "struct page" zeroing Matthew Wilcox <willy@infradead.org> - 2017-05-10 23:20 +0200
              Re: [v3 0/9] parallelized "struct page" zeroing Michal Hocko <mhocko@kernel.org> - 2017-05-11 10:10 +0200
                Re: [v3 0/9] parallelized "struct page" zeroing David Miller <davem@davemloft.net> - 2017-05-11 16:40 +0200

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