* + mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch added to mm-unstable branch
@ 2026-06-30 2:29 Andrew Morton
0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2026-06-30 2:29 UTC (permalink / raw)
To: mm-commits, ziy, vbabka, surenb, mhocko, jackmanb, hannes, ye.liu,
akpm
The patch titled
Subject: mm/page_owner: hoist CONFIG_MEMCG to function level for print_page_owner_memcg()
has been added to the -mm mm-unstable branch. Its filename is
mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.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 various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: Ye Liu <ye.liu@linux.dev>
Subject: mm/page_owner: hoist CONFIG_MEMCG to function level for print_page_owner_memcg()
Date: Tue, 30 Jun 2026 09:53:21 +0800
print_page_owner_memcg() has CONFIG_MEMCG guarding its entire body via
#ifdef inside the function, which leaves a no-op { return ret; } when the
config is disabled. Hoist the #ifdef to the top level so the real
implementation and the empty stub are two clearly separated definitions.
No functional change.
Link: https://lore.kernel.org/20260630015331.147174-5-ye.liu@linux.dev
Signed-off-by: Ye Liu <ye.liu@linux.dev>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/page_owner.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/mm/page_owner.c~mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg
+++ a/mm/page_owner.c
@@ -522,13 +522,13 @@ ext_put_continue:
seq_putc(m, '\n');
}
+#ifdef CONFIG_MEMCG
/*
* Looking for memcg information and print it out
*/
static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
struct page *page)
{
-#ifdef CONFIG_MEMCG
unsigned long memcg_data;
struct mem_cgroup *memcg;
bool online;
@@ -556,10 +556,16 @@ static inline int print_page_owner_memcg
name);
out_unlock:
rcu_read_unlock();
-#endif /* CONFIG_MEMCG */
return ret;
}
+#else
+static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
+ struct page *page)
+{
+ return ret;
+}
+#endif
static ssize_t
print_page_owner(char __user *buf, size_t count, unsigned long pfn,
_
Patches currently in -mm which might be from ye.liu@linux.dev are
mm-page_owner-extract-skip_buddy_pages-helper-to-unify-buddy-page-skipping.patch
mm-page_owner-add-mr_never-to-enum-migrate_reason-and-use-it-for-last_migrate_reason.patch
mm-use-enum-migrate_reason-instead-of-int-for-migration-reason-parameters.patch
mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch
mm-page_owner-add-missing-newline-to-count_threshold-format-string.patch
mm-page_owner-move-free_ts_nsec-output-to-free-section-in-__dump_page_owner.patch
mm-page_owner-drop-redundant-page_owner-prefix-from-static-symbols.patch
mm-page_owner-clamp-skip_buddy_pages-pfn-advance-at-max_order_nr_pages-boundary.patch
mm-page_owner-use-memcg_data-snapshot-instead-of-pagememcgkmem-to-avoid-toctou-vm_bug_on.patch
^ permalink raw reply [flat|nested] 3+ messages in thread* + mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch added to mm-unstable branch
@ 2026-07-01 3:42 Andrew Morton
0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2026-07-01 3:42 UTC (permalink / raw)
To: mm-commits, ye.liu, akpm
The patch titled
Subject: mm/page_owner: hoist CONFIG_MEMCG to function level for print_page_owner_memcg()
has been added to the -mm mm-unstable branch. Its filename is
mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.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 various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: Ye Liu <ye.liu@linux.dev>
Subject: mm/page_owner: hoist CONFIG_MEMCG to function level for print_page_owner_memcg()
Date: Wed, 1 Jul 2026 09:22:30 +0800
The print_page_owner_memcg() function has CONFIG_MEMCG guarding its entire
body via #ifdef inside the function, which leaves a no-op { return ret; }
when the config is disabled. Hoist the #ifdef to the top level so the
real implementation and the empty stub are two clearly separated
definitions.
No functional change.
Link: https://lore.kernel.org/20260701012239.315262-5-ye.liu@linux.dev
Signed-off-by: Ye Liu <ye.liu@linux.dev>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/page_owner.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/mm/page_owner.c~mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg
+++ a/mm/page_owner.c
@@ -522,13 +522,13 @@ ext_put_continue:
seq_putc(m, '\n');
}
+#ifdef CONFIG_MEMCG
/*
* Looking for memcg information and print it out
*/
static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
struct page *page)
{
-#ifdef CONFIG_MEMCG
unsigned long memcg_data;
struct mem_cgroup *memcg;
bool online;
@@ -556,10 +556,16 @@ static inline int print_page_owner_memcg
name);
out_unlock:
rcu_read_unlock();
-#endif /* CONFIG_MEMCG */
return ret;
}
+#else
+static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
+ struct page *page)
+{
+ return ret;
+}
+#endif
static ssize_t
print_page_owner(char __user *buf, size_t count, unsigned long pfn,
_
Patches currently in -mm which might be from ye.liu@linux.dev are
mm-page_owner-extract-skip_buddy_pages-helper-to-unify-buddy-page-skipping.patch
mm-page_owner-add-mr_never-to-enum-migrate_reason-and-use-it-for-last_migrate_reason.patch
mm-use-enum-migrate_reason-instead-of-int-for-migration-reason-parameters.patch
mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch
mm-page_owner-add-missing-newline-to-count_threshold-format-string.patch
mm-page_owner-move-free_ts_nsec-output-to-free-section-in-__dump_page_owner.patch
mm-page_owner-drop-redundant-page_owner-prefix-from-static-symbols.patch
^ permalink raw reply [flat|nested] 3+ messages in thread* + mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch added to mm-unstable branch
@ 2026-07-02 0:11 Andrew Morton
0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2026-07-02 0:11 UTC (permalink / raw)
To: mm-commits, ye.liu, akpm
The patch titled
Subject: mm/page_owner: hoist CONFIG_MEMCG to function level for print_page_owner_memcg()
has been added to the -mm mm-unstable branch. Its filename is
mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.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 various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: Ye Liu <ye.liu@linux.dev>
Subject: mm/page_owner: hoist CONFIG_MEMCG to function level for print_page_owner_memcg()
Date: Wed, 1 Jul 2026 14:10:47 +0800
The print_page_owner_memcg() function has CONFIG_MEMCG guarding its entire
body via #ifdef inside the function, which leaves a no-op { return ret; }
when the config is disabled. Hoist the #ifdef to the top level so the
real implementation and the empty stub are two clearly separated
definitions.
No functional change.
Link: https://lore.kernel.org/20260701061101.344679-5-ye.liu@linux.dev
Signed-off-by: Ye Liu <ye.liu@linux.dev>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/page_owner.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/mm/page_owner.c~mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg
+++ a/mm/page_owner.c
@@ -522,13 +522,13 @@ ext_put_continue:
seq_putc(m, '\n');
}
+#ifdef CONFIG_MEMCG
/*
* Looking for memcg information and print it out
*/
static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
struct page *page)
{
-#ifdef CONFIG_MEMCG
unsigned long memcg_data;
struct mem_cgroup *memcg;
bool online;
@@ -556,10 +556,16 @@ static inline int print_page_owner_memcg
name);
out_unlock:
rcu_read_unlock();
-#endif /* CONFIG_MEMCG */
return ret;
}
+#else
+static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
+ struct page *page)
+{
+ return ret;
+}
+#endif
static ssize_t
print_page_owner(char __user *buf, size_t count, unsigned long pfn,
_
Patches currently in -mm which might be from ye.liu@linux.dev are
mm-page_owner-extract-skip_buddy_pages-helper-to-unify-buddy-page-skipping.patch
mm-page_owner-add-mr_never-to-enum-migrate_reason-and-use-it-for-last_migrate_reason.patch
mm-use-enum-migrate_reason-instead-of-int-for-migration-reason-parameters.patch
mm-page_owner-hoist-config_memcg-to-function-level-for-print_page_owner_memcg.patch
mm-page_owner-add-missing-newline-to-count_threshold-format-string.patch
mm-page_owner-move-free_ts_nsec-output-to-free-section-in-__dump_page_owner.patch
mm-page_owner-drop-redundant-page_owner-prefix-from-static-symbols.patch
mm-page_owner-clamp-skip_buddy_pages-pfn-advance-at-max_order_nr_pages-boundary.patch
mm-page_owner-use-memcg_data-snapshot-instead-of-pagememcgkmem-to-avoid-toctou-vm_bug_on.patch
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-07-02 0:11 UTC | newest]
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2026-07-01 3:42 Andrew Morton
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