From: Joseph Myers <joseph@codesourcery.com>
To: <libc-alpha@sourceware.org>
Subject: Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h
Date: Tue, 7 Sep 2021 21:24:10 +0000 [thread overview]
Message-ID: <alpine.DEB.2.22.394.2109072123510.1731265@digraph.polyomino.org.uk> (raw)
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 --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
--
Joseph S. Myers
joseph@codesourcery.com
next reply other threads:[~2021-09-07 21:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-07 21:24 Joseph Myers [this message]
2021-09-13 17:41 ` Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h DJ Delorie via Libc-alpha
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