[RFC,v2,29/43] PKRAM: ensure memblocks with preserved pages init'd for numa

Commit Message

Anthony Yznaga March 30, 2021, 9:36 p.m. UTC

In order to facilitate fast initialization of page structs for
preserved pages, memblocks with preserved pages must not cross
numa node boundaries and must have a node id assigned to them.

Signed-off-by: Anthony Yznaga <[e-mail]>
---
 mm/pkram.c | 9 +++++++++
 1 file changed, 9 insertions(+)

Patch

diff --git a/mm/pkram.c b/mm/pkram.c
index aea069cc49be..b8d6b549fa6c 100644
--- a/mm/pkram.c
+++ b/mm/pkram.c
@@ -21,6 +21,7 @@ 
 #include <linux/sysfs.h>
 #include <linux/types.h>
 
+#include <asm/numa.h>
 #include "internal.h"
 
 #define PKRAM_MAGIC		0x706B726D
@@ -226,6 +227,14 @@  void __init pkram_reserve(void)
 		return;
 	}
 
+	/*
+	 * Fix up the reserved memblock list to ensure the
+	 * memblock regions are split along node boundaries
+	 * and have a node ID set.  This will allow the page
+	 * structs for the preserved pages to be initialized
+	 * more efficiently.
+	 */
+	numa_isolate_memblocks();
 done:
 	pr_info("PKRAM: %lu pages reserved\n", pkram_reserved_pages);
 }