linux-kernel - [RFC PATCH v3 14/37] mm/damon/core: report access origin cpu of page faults

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Message-ID: <20251208062943.68824-15-sj@kernel.org>
Date: Sun,  7 Dec 2025 22:29:18 -0800
From: SeongJae Park <sj@...nel.org>
To: 
Cc: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	damon@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [RFC PATCH v3 14/37] mm/damon/core: report access origin cpu of page faults

The CPU that executes the page fault event reporting function is the CPU
that made the access.  Report the origin CPU of the access.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index a14754a47c7f..d2f842d8afd2 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1585,6 +1585,7 @@ void damon_report_page_fault(struct vm_fault *vmf, bool huge_pmd)
 {
 	struct damon_access_report access_report = {
 		.size = 1,	/* todo: set appripriately */
+		.cpu = smp_processor_id(),
 	};
 
 	if (huge_pmd)
-- 
2.47.3