From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>, Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Shakeel Butt <shakeel.butt@linux.dev>,
Jann Horn <jannh@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-rt-devel@lists.linux.dev,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
Boqun Feng <boqun.feng@gmail.com>,
Waiman Long <longman@redhat.com>,
Clark Williams <clrkwllms@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH v4 04/10] mm/vma: add+use vma lockdep acquire/release defines
Date: Wed, 28 Jan 2026 12:37:49 +0100 [thread overview]
Message-ID: <20260128113749.osNjwNqo@linutronix.de> (raw)
In-Reply-To: <fdae72441949ecf3b4a0ed3510da803e881bb153.1769198904.git.lorenzo.stoakes@oracle.com>
On 2026-01-23 20:12:14 [+0000], Lorenzo Stoakes wrote:
> --- a/include/linux/mmap_lock.h
> +++ b/include/linux/mmap_lock.h
> @@ -78,6 +78,37 @@ static inline void mmap_assert_write_locked(const struct mm_struct *mm)
…
> +/* Only meaningful if CONFIG_LOCK_STAT is defined. */
> +#define __vma_lockdep_stat_mark_acquired(vma) \
> + lock_acquired(&vma->vmlock_dep_map, _RET_IP_)
> +
After going through the remaining series, I don't think I found a
matching lock_contended(). So perf/ tracing just give you a few
lock-acquired events. Wouldn't it make sense to also some
lock_contended() events where the caller had to wait before it could
acquire the lock?
Sebastian
next prev parent reply other threads:[~2026-01-28 11:37 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-23 20:12 [PATCH v4 00/10] mm: add and use vma_assert_stabilised() helper Lorenzo Stoakes
2026-01-23 20:12 ` [PATCH v4 01/10] mm/vma: rename VMA_LOCK_OFFSET to VM_REFCNT_EXCLUDE_READERS_FLAG Lorenzo Stoakes
2026-01-30 16:50 ` Liam R. Howlett
2026-01-23 20:12 ` [PATCH v4 02/10] mm/vma: document possible vma->vm_refcnt values and reference comment Lorenzo Stoakes
2026-01-26 5:15 ` Suren Baghdasaryan
2026-01-26 9:33 ` Lorenzo Stoakes
2026-01-26 9:40 ` Vlastimil Babka
2026-01-30 17:06 ` Liam R. Howlett
2026-01-23 20:12 ` [PATCH v4 03/10] mm/vma: rename is_vma_write_only(), separate out shared refcount put Lorenzo Stoakes
2026-01-26 5:36 ` Suren Baghdasaryan
2026-01-26 9:45 ` Lorenzo Stoakes
2026-01-26 10:12 ` Vlastimil Babka
2026-01-23 20:12 ` [PATCH v4 04/10] mm/vma: add+use vma lockdep acquire/release defines Lorenzo Stoakes
2026-01-28 11:18 ` Sebastian Andrzej Siewior
2026-01-28 11:31 ` Lorenzo Stoakes
2026-01-28 11:37 ` Sebastian Andrzej Siewior [this message]
2026-01-28 11:48 ` Lorenzo Stoakes
2026-01-29 21:30 ` Suren Baghdasaryan
2026-01-23 20:12 ` [PATCH v4 05/10] mm/vma: de-duplicate __vma_enter_locked() error path Lorenzo Stoakes
2026-01-23 20:12 ` [PATCH v4 06/10] mm/vma: clean up __vma_enter/exit_locked() Lorenzo Stoakes
2026-01-26 5:47 ` Suren Baghdasaryan
2026-01-26 9:45 ` Lorenzo Stoakes
2026-01-26 10:25 ` Vlastimil Babka
2026-01-23 20:12 ` [PATCH v4 07/10] mm/vma: introduce helper struct + thread through exclusive lock fns Lorenzo Stoakes
2026-01-26 11:16 ` Vlastimil Babka
2026-01-26 16:09 ` Lorenzo Stoakes
2026-01-26 19:38 ` Andrew Morton
2026-01-26 18:15 ` Suren Baghdasaryan
2026-01-23 20:12 ` [PATCH v4 08/10] mm/vma: improve and document __is_vma_write_locked() Lorenzo Stoakes
2026-01-26 11:30 ` Vlastimil Babka
2026-01-26 16:29 ` Lorenzo Stoakes
2026-01-26 19:21 ` Suren Baghdasaryan
2026-01-28 11:51 ` Lorenzo Stoakes
2026-01-28 13:01 ` Vlastimil Babka
2026-01-28 18:52 ` Suren Baghdasaryan
2026-01-26 16:30 ` Lorenzo Stoakes
2026-01-23 20:12 ` [PATCH v4 09/10] mm/vma: update vma_assert_locked() to use lockdep Lorenzo Stoakes
2026-01-26 13:42 ` Vlastimil Babka
2026-01-26 16:44 ` Lorenzo Stoakes
2026-01-26 17:16 ` Lorenzo Stoakes
2026-01-26 17:37 ` Lorenzo Stoakes
2026-01-23 20:12 ` [PATCH v4 10/10] mm/vma: add and use vma_assert_stabilised() Lorenzo Stoakes
2026-01-23 22:48 ` [PATCH v4 00/10] mm: add and use vma_assert_stabilised() helper Andrew Morton
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