[v3,6/9] sparc64: teach sparc not to zero struct pages memory

Message ID 1494003796-748672-7-git-send-email-pasha.tatashin@oracle.com
State Not Applicable
Headers show

Commit Message

Pavel Tatashin May 5, 2017, 5:03 p.m.
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 SPARC.

Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
---
 arch/sparc/mm/init_64.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

Patch

diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index c72d070..dae040c 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2546,7 +2546,7 @@  int __meminit vmemmap_populate(unsigned long vstart, unsigned long vend,
 		pte = pmd_val(*pmd);
 		if (!(pte & _PAGE_VALID)) {
 			void *block = vmemmap_alloc_block(PMD_SIZE, node,
-							  true);
+							  VMEMMAP_ZERO);
 
 			if (!block)
 				return -ENOMEM;