On Fri, Jun 3, 2022 at 5:40 PM Zach O'Keefe <zokeefe@xxxxxxxxxx> wrote:
>
> Tools able to translate MADV_COLLAPSE advice to human readable string:
>
> $ tools/perf/trace/beauty/madvise_behavior.sh
> static const char *madvise_advices[] = {
> [0] = "NORMAL",
> [1] = "RANDOM",
> [2] = "SEQUENTIAL",
> [3] = "WILLNEED",
> [4] = "DONTNEED",
> [8] = "FREE",
> [9] = "REMOVE",
> [10] = "DONTFORK",
> [11] = "DOFORK",
> [12] = "MERGEABLE",
> [13] = "UNMERGEABLE",
> [14] = "HUGEPAGE",
> [15] = "NOHUGEPAGE",
> [16] = "DONTDUMP",
> [17] = "DODUMP",
> [18] = "WIPEONFORK",
> [19] = "KEEPONFORK",
> [20] = "COLD",
> [21] = "PAGEOUT",
> [22] = "POPULATE_READ",
> [23] = "POPULATE_WRITE",
> [24] = "DONTNEED_LOCKED",
> [25] = "COLLAPSE",
> [100] = "HWPOISON",
> [101] = "SOFT_OFFLINE",
> };
>
> Signed-off-by: Zach O'Keefe <zokeefe@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 6c1aa92a92e4..6ce1f1ceb432 100644
> --- a/tools/include/uapi/asm-generic/mman-common.h
> +++ b/tools/include/uapi/asm-generic/mman-common.h
> @@ -77,6 +77,8 @@
>
> #define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */
>
> +#define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */
I think this patch could be squashed into patch #9?
> +
> /* compatibility flags */
> #define MAP_FILE 0
>
> --
> 2.36.1.255.ge46751e96f-goog
>
