lkml.org 
[lkml]   [2017]   [May]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[v3 8/9] powerpc: teach platforms not to zero struct pages memory
Date
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 PowerPC platforms.

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

diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index d42c6b3..c381bd7 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -181,7 +181,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
if (vmemmap_populated(start, page_size))
continue;

- p = vmemmap_alloc_block(page_size, node, true);
+ p = vmemmap_alloc_block(page_size, node, VMEMMAP_ZERO);
if (!p)
return -ENOMEM;

--
1.7.1
\
 
 \ /
  Last update: 2017-05-05 19:05    [W:0.111 / U:3.780 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site