+ proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5.patch added to mm-unstable branch

+ proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5
has been added to the -mm mm-unstable branch.  Its filename is
     proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Stefan Roesch <shr@devkernel.io>
Subject: proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5
Date: Wed, 23 Aug 2023 10:01:07 -0700

Link: https://lkml.kernel.org/r/20230823170107.1457915-1-shr@devkernel.io
Signed-off-by: Stefan Roesch <shr@devkernel.io>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/filesystems/proc.rst |    4 ++--
 fs/proc/task_mmu.c                 |   12 ++++++------
 2 files changed, 8 insertions(+), 8 deletions(-)

--- a/Documentation/filesystems/proc.rst~proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5
+++ a/Documentation/filesystems/proc.rst
@@ -502,8 +502,8 @@ accessed.
 a mapping associated with a file may contain anonymous pages: when MAP_PRIVATE
 and a page is modified, the file page is replaced by a private anonymous copy.
 
-"KSM" shows the amount of anonymous memory that has been de-duplicated. The
-value is independent of the use of shared zeropage.
+"KSM" reports how many of the pages are KSM pages. Note that KSM-placed zeropages
+are not included, only actual KSM pages.
 
 "LazyFree" shows the amount of memory which is marked by madvise(MADV_FREE).
 The memory isn't freed immediately with madvise(). It's freed in memory
--- a/fs/proc/task_mmu.c~proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5
+++ a/fs/proc/task_mmu.c
@@ -437,9 +437,9 @@ static void smaps_page_accumulate(struct
 	}
 }
 
-static void smaps_account(struct mem_size_stats *mss, pte_t *pte,
-		struct page *page, bool compound, bool young, bool dirty,
-		bool locked, bool migration)
+static void smaps_account(struct mem_size_stats *mss, struct page *page,
+		bool compound, bool young, bool dirty, bool locked,
+		bool migration)
 {
 	int i, nr = compound ? compound_nr(page) : 1;
 	unsigned long size = nr * PAGE_SIZE;
@@ -454,7 +454,7 @@ static void smaps_account(struct mem_siz
 			mss->lazyfree += size;
 	}
 
-	if (PageKsm(page) && (!pte || !is_ksm_zero_pte(*pte)))
+	if (PageKsm(page))
 		mss->ksm += size;
 
 	mss->resident += size;
@@ -562,7 +562,7 @@ static void smaps_pte_entry(pte_t *pte,
 	if (!page)
 		return;
 
-	smaps_account(mss, pte, page, false, young, dirty, locked, migration);
+	smaps_account(mss, page, false, young, dirty, locked, migration);
 }
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
@@ -596,7 +596,7 @@ static void smaps_pmd_entry(pmd_t *pmd,
 	else
 		mss->file_thp += HPAGE_PMD_SIZE;
 
-	smaps_account(mss, NULL, page, true, pmd_young(*pmd), pmd_dirty(*pmd),
+	smaps_account(mss, page, true, pmd_young(*pmd), pmd_dirty(*pmd),
 		      locked, migration);
 }
 #else
_

Patches currently in -mm which might be from shr@devkernel.io are

proc-ksm-add-ksm-stats-to-proc-pid-smaps.patch
proc-ksm-add-ksm-stats-to-proc-pid-smaps-v5.patch