From: Andrew Morton <akpm@linux-foundation.org>
To: mm-commits@vger.kernel.org,willy@infradead.org,vbabka@kernel.org,surenb@google.com,rppt@kernel.org,nathan@kernel.org,morbo@google.com,mhocko@suse.com,ljs@kernel.org,liam.howlett@oracle.com,justinstitt@google.com,david.laight.linux@gmail.com,david@kernel.org,qq570070308@gmail.com,akpm@linux-foundation.org
Subject: [nacked] mm-debug-optimize-once-judgment-with-clang.patch removed from -mm tree
Date: Thu, 26 Mar 2026 19:09:36 -0700 [thread overview]
Message-ID: <20260327020937.18D7AC2BCB2@smtp.kernel.org> (raw)
The quilt patch titled
Subject: mm/debug: optimize once judgment with clang
has been removed from the -mm tree. Its filename was
mm-debug-optimize-once-judgment-with-clang.patch
This patch was dropped because it was nacked
------------------------------------------------------
From: Xie Yuanbin <qq570070308@gmail.com>
Subject: mm/debug: optimize once judgment with clang
Date: Mon, 9 Mar 2026 23:34:05 +0800
commit 242b872239f6a7deacbc ("include/linux/once_lite.h: fix judgment in
WARN_ONCE with clang") helps optimize performance and size under the clang
compiler, but the modification is not complete.
Port the modification to VM_WARN_ON_ONCE_PAGE(), VM_WARN_ON_ONCE_FOLIO(),
VM_WARN_ON_ONCE_MM() and VM_WARN_ON_ONCE_VMA().
Link: https://lkml.kernel.org/r/20260309153405.20130-1-qq570070308@gmail.com
Signed-off-by: Xie Yuanbin <qq570070308@gmail.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: David Laight <david.laight.linux@gmail.com>
Cc: Bill Wendling <morbo@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/mmdebug.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/include/linux/mmdebug.h~mm-debug-optimize-once-judgment-with-clang
+++ a/include/linux/mmdebug.h
@@ -60,7 +60,7 @@ void vma_iter_dump_tree(const struct vma
static bool __section(".data..once") __warned; \
int __ret_warn_once = !!(cond); \
\
- if (unlikely(__ret_warn_once && !__warned)) { \
+ if (unlikely(__ret_warn_once) && unlikely(!__warned)) { \
dump_page(page, "VM_WARN_ON_ONCE_PAGE(" __stringify(cond)")");\
__warned = true; \
WARN_ON(1); \
@@ -80,7 +80,7 @@ void vma_iter_dump_tree(const struct vma
static bool __section(".data..once") __warned; \
int __ret_warn_once = !!(cond); \
\
- if (unlikely(__ret_warn_once && !__warned)) { \
+ if (unlikely(__ret_warn_once) && unlikely(!__warned)) { \
dump_page(&folio->page, "VM_WARN_ON_ONCE_FOLIO(" __stringify(cond)")");\
__warned = true; \
WARN_ON(1); \
@@ -91,7 +91,7 @@ void vma_iter_dump_tree(const struct vma
static bool __section(".data..once") __warned; \
int __ret_warn_once = !!(cond); \
\
- if (unlikely(__ret_warn_once && !__warned)) { \
+ if (unlikely(__ret_warn_once) && unlikely(!__warned)) { \
dump_mm(mm); \
__warned = true; \
WARN_ON(1); \
@@ -102,7 +102,7 @@ void vma_iter_dump_tree(const struct vma
static bool __section(".data..once") __warned; \
int __ret_warn_once = !!(cond); \
\
- if (unlikely(__ret_warn_once && !__warned)) { \
+ if (unlikely(__ret_warn_once) && unlikely(!__warned)) { \
dump_vma(vma); \
__warned = true; \
WARN_ON(1); \
_
Patches currently in -mm which might be from qq570070308@gmail.com are
mm-optimize-the-implementation-of-warn_on_once_gfp.patch
reply other threads:[~2026-03-27 2:09 UTC|newest]
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