+ tools-vm-page_owner-filter-out-pid-and-timestamp.patch added to -mm tree

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: tools/vm/page_owner: filter out pid and timestamp
has been added to the -mm tree.  Its filename is
     tools-vm-page_owner-filter-out-pid-and-timestamp.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/tools-vm-page_owner-filter-out-pid-and-timestamp.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/tools-vm-page_owner-filter-out-pid-and-timestamp.patch

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------------------------------------------------------
From: Muchun Song <songmuchun@bytedance.com>
Subject: tools/vm/page_owner: filter out pid and timestamp

Commit 9cc7e96aa846 ("mm/page_owner: record timestamp and pid") introduces
timestamp and pid for page owner.  However, it is hard to aggregate the
stack since those are specific (especially timestamp).  Filter out those
information when aggregating.

Link: https://lkml.kernel.org/r/20220215134045.12004-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: Liam Mark <lmark@codeaurora.org>
Cc: Georgi Djakov <georgi.djakov@linaro.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/vm/page_owner_sort.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/tools/vm/page_owner_sort.c~tools-vm-page_owner-filter-out-pid-and-timestamp
+++ a/tools/vm/page_owner_sort.c
@@ -50,6 +50,12 @@ int read_block(char *buf, int buf_size,
 			return curr - buf;
 		if (!strncmp(curr, "PFN", 3))
 			continue;
+		if (!strncmp(curr, "Page allocated via order", 24)) {
+			char *end = strstr(curr, ", pid ");
+
+			if (end)
+				memcpy(end, "\n", 2);
+		}
 		curr += strlen(curr);
 	}
 
_

Patches currently in -mm which might be from songmuchun@bytedance.com are

tools-vm-page_owner-filter-out-pid-and-timestamp.patch
mm-thp-fix-wrong-cache-flush-in-remove_migration_pmd.patch
mm-fix-missing-cache-flush-for-all-tail-pages-of-compound-page.patch
mm-hugetlb-fix-missing-cache-flush-in-copy_huge_page_from_user.patch
mm-hugetlb-fix-missing-cache-flush-in-hugetlb_mcopy_atomic_pte.patch
mm-shmem-fix-missing-cache-flush-in-shmem_mfill_atomic_pte.patch
mm-userfaultfd-fix-missing-cache-flush-in-mcopy_atomic_pte-and-__mcopy_atomic.patch
mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch
mm-hugetlb-free-the-2nd-vmemmap-page-associated-with-each-hugetlb-page.patch
mm-hugetlb-replace-hugetlb_free_vmemmap_enabled-with-a-static_key.patch
mm-sparsemem-use-page-table-lock-to-protect-kernel-pmd-operations.patch
selftests-vm-add-a-hugetlb-test-case.patch
mm-sparsemem-move-vmemmap-related-to-hugetlb-to-config_hugetlb_page_free_vmemmap.patch