diff mbox series

[v1,1/5] include/uapi/linux/kernel-page-flags.h: define KPF_FOLIO

Message ID 20231010142801.3780917-2-naoya.horiguchi@linux.dev
State New
Headers
Series mm, kpageflags: support folio and fix output for compound pages |

Commit Message

Naoya Horiguchi Oct. 10, 2023, 2:27 p.m. UTC 
  From: Naoya Horiguchi <naoya.horiguchi@nec.com>

Define a new KPF flag to represent folio in /proc/kpageflags and
in-kernel user page-types.c.

Note that in page-types.c I chose 'f' for the character representing folio,
which conflicts with KPF_SOFTDIRTY, but we have no other choice because
all reasonable choices ('f', 'F', 'o', 'O', 'l', 'L', 'i', and 'I') are
already used.  You need to pay attention to long flag names or the position
of 'f' in short form.

Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
---
 include/uapi/linux/kernel-page-flags.h | 1 +
 tools/mm/page-types.c                  | 1 +
 2 files changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h
index 6f2f2720f3ac..9b43dadb7f49 100644
--- a/include/uapi/linux/kernel-page-flags.h
+++ b/include/uapi/linux/kernel-page-flags.h
@@ -36,5 +36,6 @@ 
 #define KPF_ZERO_PAGE		24
 #define KPF_IDLE		25
 #define KPF_PGTABLE		26
+#define KPF_FOLIO		27
 
 #endif /* _UAPILINUX_KERNEL_PAGE_FLAGS_H */
diff --git a/tools/mm/page-types.c b/tools/mm/page-types.c
index 8d5595b6c59f..b78448d19e88 100644
--- a/tools/mm/page-types.c
+++ b/tools/mm/page-types.c
@@ -126,6 +126,7 @@  static const char * const page_flag_names[] = {
 	[KPF_PGTABLE]		= "g:pgtable",
 	[KPF_ZERO_PAGE]		= "z:zero_page",
 	[KPF_IDLE]              = "i:idle_page",
+	[KPF_FOLIO]		= "f:folio",
 
 	[KPF_RESERVED]		= "r:reserved",
 	[KPF_MLOCKED]		= "m:mlocked",