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From: Fangrui Song <maskray@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/maskray/unnest] Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h Date: Thu, 23 Sep 2021 06:36:40 +0000 (GMT) [thread overview] Message-ID: <20210923063640.97BD0385801A@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3561106278cddd2f007bd27fd4c3e90caaf14b43 commit 3561106278cddd2f007bd27fd4c3e90caaf14b43 Author: Joseph Myers <joseph@codesourcery.com> Date: Tue Sep 14 14:19:24 2021 +0000 Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h Linux 5.14 adds constants MADV_POPULATE_READ and MADV_POPULATE_WRITE (with the same values on all architectures). Add these to glibc's bits/mman-linux.h. Tested for x86_64. Diff: --- sysdeps/unix/sysv/linux/bits/mman-linux.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sysdeps/unix/sysv/linux/bits/mman-linux.h b/sysdeps/unix/sysv/linux/bits/mman-linux.h index 3b1ae418e0..31451c28d9 100644 --- a/sysdeps/unix/sysv/linux/bits/mman-linux.h +++ b/sysdeps/unix/sysv/linux/bits/mman-linux.h @@ -89,6 +89,10 @@ # define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK. */ # define MADV_COLD 20 /* Deactivate these pages. */ # define MADV_PAGEOUT 21 /* Reclaim these pages. */ +# define MADV_POPULATE_READ 22 /* Populate (prefault) page tables + readable. */ +# define MADV_POPULATE_WRITE 23 /* Populate (prefault) page tables + writable. */ # define MADV_HWPOISON 100 /* Poison a page for testing. */ #endif
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