[FYI PATCH 1/1] tools headers UAPI: Sync asm-generic/mman-common.h with the kernel
From: Arnaldo Carvalho de Melo
Date: Tue Mar 29 2022 - 15:22:22 EST
Just FYI: I'm carrying this patch on the perf tools tree.
- Arnaldo
---
To pick the changes from:
9457056ac426e5ed ("mm: madvise: MADV_DONTNEED_LOCKED")
That result in these changes in the tools:
$ diff -u tools/include/uapi/asm-generic/mman-common.h include/uapi/asm-generic/mman-common.h
--- tools/include/uapi/asm-generic/mman-common.h 2022-03-29 16:17:50.461694991 -0300
+++ include/uapi/asm-generic/mman-common.h 2022-03-27 19:12:48.923250468 -0300
@@ -75,6 +75,8 @@
#define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */
#define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */
+#define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */
+
/* compatibility flags */
#define MAP_FILE 0
$ tools/perf/trace/beauty/madvise_behavior.sh > before
$ cp include/uapi/asm-generic/mman-common.h tools/include/uapi/asm-generic/mman-common.h
$ tools/perf/trace/beauty/madvise_behavior.sh > after
$ diff -u before after
--- before 2022-03-29 16:18:04.091044244 -0300
+++ after 2022-03-29 16:18:11.692238906 -0300
@@ -20,6 +20,7 @@
[21] = "PAGEOUT",
[22] = "POPULATE_READ",
[23] = "POPULATE_WRITE",
+ [24] = "DONTNEED_LOCKED",
[100] = "HWPOISON",
[101] = "SOFT_OFFLINE",
};
$
I.e. now when madvise gets those behaviours as args, 'perf trace' will
be able to translate from the number to a human readable string and to
use the strings in tracepoint filter expressions.
This addresses the following perf build warning:
Warning: Kernel ABI header at 'tools/include/uapi/asm-generic/mman-common.h' differs from latest version at 'include/uapi/asm-generic/mman-common.h'
diff -u tools/include/uapi/asm-generic/mman-common.h include/uapi/asm-generic/mman-common.h
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/include/uapi/asm-generic/mman-common.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/include/uapi/asm-generic/mman-common.h b/tools/include/uapi/asm-generic/mman-common.h
index 1567a3294c3dbf3e..6c1aa92a92e44119 100644
--- a/tools/include/uapi/asm-generic/mman-common.h
+++ b/tools/include/uapi/asm-generic/mman-common.h
@@ -75,6 +75,8 @@
#define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */
#define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */
+#define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */
+
/* compatibility flags */
#define MAP_FILE 0
--
2.35.1