The patch titled
Subject: mm: drop the 'anon_' prefix for swap-out mTHP counters
has been added to the -mm mm-unstable branch. Its filename is
mm-drop-the-anon_-prefix-for-swap-out-mthp-counters.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-drop-the-anon_-prefix-for-swap-out-mthp-counters.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Subject: mm: drop the 'anon_' prefix for swap-out mTHP counters
Date: Thu, 23 May 2024 10:36:39 +0800
The mTHP swap related counters: 'anon_swpout' and 'anon_swpout_fallback'
are confusing with an 'anon_' prefix, since the shmem can swap out
non-anonymous pages. So drop the 'anon_' prefix to keep consistent with
the old swap counter names.
Link: https://lkml.kernel.org/r/7a8989c13299920d7589007a30065c3e2c19f0e0.1716431702.git.baolin.wang@xxxxxxxxxxxxxxxxx
Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Suggested-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Acked-by: Barry Song <baohua@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Lance Yang <ioworker0@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/admin-guide/mm/transhuge.rst | 4 ++--
include/linux/huge_mm.h | 4 ++--
mm/huge_memory.c | 8 ++++----
mm/page_io.c | 2 +-
mm/vmscan.c | 2 +-
5 files changed, 10 insertions(+), 10 deletions(-)
--- a/Documentation/admin-guide/mm/transhuge.rst~mm-drop-the-anon_-prefix-for-swap-out-mthp-counters
+++ a/Documentation/admin-guide/mm/transhuge.rst
@@ -467,11 +467,11 @@ anon_fault_fallback_charge
instead falls back to using huge pages with lower orders or
small pages even though the allocation was successful.
-anon_swpout
+swpout
is incremented every time a huge page is swapped out in one
piece without splitting.
-anon_swpout_fallback
+swpout_fallback
is incremented if a huge page has to be split before swapout.
Usually because failed to allocate some continuous swap space
for the huge page.
--- a/include/linux/huge_mm.h~mm-drop-the-anon_-prefix-for-swap-out-mthp-counters
+++ a/include/linux/huge_mm.h
@@ -269,8 +269,8 @@ enum mthp_stat_item {
MTHP_STAT_ANON_FAULT_ALLOC,
MTHP_STAT_ANON_FAULT_FALLBACK,
MTHP_STAT_ANON_FAULT_FALLBACK_CHARGE,
- MTHP_STAT_ANON_SWPOUT,
- MTHP_STAT_ANON_SWPOUT_FALLBACK,
+ MTHP_STAT_SWPOUT,
+ MTHP_STAT_SWPOUT_FALLBACK,
__MTHP_STAT_COUNT
};
--- a/mm/huge_memory.c~mm-drop-the-anon_-prefix-for-swap-out-mthp-counters
+++ a/mm/huge_memory.c
@@ -558,15 +558,15 @@ static struct kobj_attribute _name##_att
DEFINE_MTHP_STAT_ATTR(anon_fault_alloc, MTHP_STAT_ANON_FAULT_ALLOC);
DEFINE_MTHP_STAT_ATTR(anon_fault_fallback, MTHP_STAT_ANON_FAULT_FALLBACK);
DEFINE_MTHP_STAT_ATTR(anon_fault_fallback_charge, MTHP_STAT_ANON_FAULT_FALLBACK_CHARGE);
-DEFINE_MTHP_STAT_ATTR(anon_swpout, MTHP_STAT_ANON_SWPOUT);
-DEFINE_MTHP_STAT_ATTR(anon_swpout_fallback, MTHP_STAT_ANON_SWPOUT_FALLBACK);
+DEFINE_MTHP_STAT_ATTR(swpout, MTHP_STAT_SWPOUT);
+DEFINE_MTHP_STAT_ATTR(swpout_fallback, MTHP_STAT_SWPOUT_FALLBACK);
static struct attribute *stats_attrs[] = {
&anon_fault_alloc_attr.attr,
&anon_fault_fallback_attr.attr,
&anon_fault_fallback_charge_attr.attr,
- &anon_swpout_attr.attr,
- &anon_swpout_fallback_attr.attr,
+ &swpout_attr.attr,
+ &swpout_fallback_attr.attr,
NULL,
};
--- a/mm/page_io.c~mm-drop-the-anon_-prefix-for-swap-out-mthp-counters
+++ a/mm/page_io.c
@@ -217,7 +217,7 @@ static inline void count_swpout_vm_event
count_memcg_folio_events(folio, THP_SWPOUT, 1);
count_vm_event(THP_SWPOUT);
}
- count_mthp_stat(folio_order(folio), MTHP_STAT_ANON_SWPOUT);
+ count_mthp_stat(folio_order(folio), MTHP_STAT_SWPOUT);
#endif
count_vm_events(PSWPOUT, folio_nr_pages(folio));
}
--- a/mm/vmscan.c~mm-drop-the-anon_-prefix-for-swap-out-mthp-counters
+++ a/mm/vmscan.c
@@ -1230,7 +1230,7 @@ retry:
THP_SWPOUT_FALLBACK, 1);
count_vm_event(THP_SWPOUT_FALLBACK);
}
- count_mthp_stat(order, MTHP_STAT_ANON_SWPOUT_FALLBACK);
+ count_mthp_stat(order, MTHP_STAT_SWPOUT_FALLBACK);
#endif
if (!add_to_swap(folio))
goto activate_locked_split;
_
Patches currently in -mm which might be from baolin.wang@xxxxxxxxxxxxxxxxx are
mm-drop-the-anon_-prefix-for-swap-out-mthp-counters.patch
