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authorSzabolcs Nagy <nsz@port70.net>2019-12-22 10:26:20 +0000
committerRich Felker <dalias@aerifal.cx>2019-12-30 18:14:08 -0500
commitd95ead261e25282192e2291411740b94c2c76db3 (patch)
treedb13b3cd9db568f2c641863efaf3fa2db9852b64 /include
parentfa765ca54f1b5417df2ef54039ad580938a6c549 (diff)
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sys/mman.h: add MADV_COLD and MADV_PAGEOUT from linux v5.4
These were mainly introduced so android can optimize the memory usage of unused apps. MADV_COLD hints that the memory range is currently not needed (unlike with MADV_FREE the content is not garbage, it needs to be swapped): linux commit 9c276cc65a58faf98be8e56962745ec99ab87636 mm: introduce MADV_COLD MADV_PAGEOUT hints that the memory range is not needed for a long time so it can be reclaimed immediately independently of memory pressure (unlike with MADV_DONTNEED the content is not garbage): linux commit 1a4e58cce84ee88129d5d49c064bd2852b481357 mm: introduce MADV_PAGEOUT
Diffstat (limited to 'include')
-rw-r--r--include/sys/mman.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/sys/mman.h b/include/sys/mman.h
index d0761b18..3bade727 100644
--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@@ -92,6 +92,8 @@ extern "C" {
#define MADV_DODUMP 17
#define MADV_WIPEONFORK 18
#define MADV_KEEPONFORK 19
+#define MADV_COLD 20
+#define MADV_PAGEOUT 21
#define MADV_HWPOISON 100
#define MADV_SOFT_OFFLINE 101
#endif