* Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h
@ 2021-09-07 21:24 Joseph Myers
2021-09-13 17:41 ` DJ Delorie via Libc-alpha
0 siblings, 1 reply; 2+ messages in thread
From: Joseph Myers @ 2021-09-07 21:24 UTC (permalink / raw)
To: libc-alpha
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h
2021-09-07 21:24 Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h Joseph Myers
@ 2021-09-13 17:41 ` DJ Delorie via Libc-alpha
0 siblings, 0 replies; 2+ messages in thread
From: DJ Delorie via Libc-alpha @ 2021-09-13 17:41 UTC (permalink / raw)
To: Joseph Myers; +Cc: libc-alpha
Joseph Myers <joseph@codesourcery.com> writes:
> +# define MADV_POPULATE_READ 22 /* Populate (prefault) page tables
> + readable. */
> +# define MADV_POPULATE_WRITE 23 /* Populate (prefault) page tables
> + writable. */
Confirmed that these are the correct values across all arch's in the
linux source tree.
Reviewed-by: DJ Delorie <dj@redhat.com>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-09-07 21:24 Add MADV_POPULATE_READ and MADV_POPULATE_WRITE from Linux 5.14 to bits/mman-linux.h Joseph Myers
2021-09-13 17:41 ` DJ Delorie via Libc-alpha
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