diff mbox series

[v3,2/3] kernel/fork.c: get totalram_pages from memblock to calculate max_threads

Message ID 20240703005151.28712-2-richard.weiyang@gmail.com (mailing list archive)
State New
Headers show
Series [v3,1/3] mm/memblock: introduce a new helper memblock_estimated_nr_pages() | expand

Commit Message

Wei Yang July 3, 2024, 12:51 a.m. UTC 
Since we plan to move the accounting into __free_pages_core(),
totalram_pages may not represent the total usable pages on system
at this point when defer_init is enabled.

Instead we can get the total estimated pages from memblock directly.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
CC: Mike Rapoport (IBM) <rppt@kernel.org>
CC: David Hildenbrand <david@redhat.com>
CC: Oleg Nesterov <oleg@redhat.com>
---
 kernel/fork.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/kernel/fork.c b/kernel/fork.c
index 99076dbe27d8..e80e889543f3 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -44,6 +44,7 @@ 
 #include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/mm_inline.h>
+#include <linux/memblock.h>
 #include <linux/nsproxy.h>
 #include <linux/capability.h>
 #include <linux/cpu.h>
@@ -999,7 +1000,7 @@  void __init __weak arch_task_cache_init(void) { }
 static void set_max_threads(unsigned int max_threads_suggested)
 {
 	u64 threads;
-	unsigned long nr_pages = totalram_pages();
+	unsigned long nr_pages = memblock_estimated_nr_pages();
 
 	/*
 	 * The number of threads shall be limited such that the thread