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Date: Tue, 8 Aug 2023 21:41:06 +0200
From: Michal Biesek <michalbiesek@...il.com>
To: musl@...ts.openwall.com
Cc: Michal Biesek <michalbiesek@...il.com>
Subject: [PATCH] sys/mman.h: add MADV_COLLAPSE from linux v6.1
Add madvise flag which performs a best-effort synchronous
collapse of the native pages mapped by the memory range
into Transparent Huge Pages (THPs)
see
linux commit 7d8faaf155454f8798ec56404faca29a82689c77
mm/madvise: introduce MADV_COLLAPSE sync hugepage collapse
---
include/sys/mman.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/sys/mman.h b/include/sys/mman.h
index 3d5d0f9c..fdc793a5 100644
--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@@ -95,6 +95,7 @@ extern "C" {
#define MADV_KEEPONFORK 19
#define MADV_COLD 20
#define MADV_PAGEOUT 21
+#define MADV_COLLAPSE 25
#define MADV_HWPOISON 100
#define MADV_SOFT_OFFLINE 101
#endif
--
2.34.1
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