From 19f9aeaaba1bde5b541b7758cbf661ba29fb9cea Mon Sep 17 00:00:00 2001 From: Michal Biesek Date: Tue, 8 Aug 2023 21:41:06 +0200 Subject: 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 0184f642..aa2c4817 100644 --- a/include/sys/mman.h +++ b/include/sys/mman.h @@ -98,6 +98,7 @@ extern "C" { #define MADV_POPULATE_READ 22 #define MADV_POPULATE_WRITE 23 #define MADV_DONTNEED_LOCKED 24 +#define MADV_COLLAPSE 25 #define MADV_HWPOISON 100 #define MADV_SOFT_OFFLINE 101 #endif -- cgit v1.2.1