From: Zi Yan <ziy@xxxxxxxxxx> Bit 27 is used to identify PUD THP. Signed-off-by: Zi Yan <ziy@xxxxxxxxxx> --- fs/proc/page.c | 2 ++ include/uapi/linux/kernel-page-flags.h | 1 + 2 files changed, 3 insertions(+) diff --git a/fs/proc/page.c b/fs/proc/page.c index f3b39a7d2bf3..e4e2ad3612c9 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -161,6 +161,8 @@ u64 stable_page_flags(struct page *page) u |= BIT_ULL(KPF_ZERO_PAGE); u |= BIT_ULL(KPF_THP); } + if (compound_order(head) == HPAGE_PUD_ORDER) + u |= 1 << KPF_PUD_THP; } else if (is_zero_pfn(page_to_pfn(page))) u |= BIT_ULL(KPF_ZERO_PAGE); diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h index 6f2f2720f3ac..62c5fc70909b 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_PUD_THP 27 #endif /* _UAPILINUX_KERNEL_PAGE_FLAGS_H */ -- 2.28.0
