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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Shakeel Butt , Jann Horn , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, Peter Zijlstra , Ingo Molnar , Will Deacon , Boqun Feng , Waiman Long , Clark Williams , Steven Rostedt Subject: Re: [PATCH v4 04/10] mm/vma: add+use vma lockdep acquire/release defines Message-ID: <20260128113749.osNjwNqo@linutronix.de> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: X-Rspamd-Server: rspam11 X-Stat-Signature: juruyg418tkc9ipa87enbrbaujgqzxxy X-Rspam-User: X-Rspamd-Queue-Id: A57F320006 X-HE-Tag: 1769600272-51475 X-HE-Meta: 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 5UScr31W fecvgWC+eFPj0rFgM6T/ga/cFZCPE+iZe+n3yNxb1OI63vy358DHj5YpalGLocEmBtOYdrilotxrS+/yJ35sI/xb8xGzBV++9mWBSPhPJyv8P49ug8o6NkyOffNm0ZpvzNnhiWJ4yuf9C0UuwO5QqvdsZv4f7Ceqz3hK2s6tXAG45kSlOB1qY2WIu/4Z3YAPcQ+wacqIV4UywVp8Ue0xpX2z8+s5dgx6mie1S X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 stru= ct mm_struct *mm) =E2=80=A6 > +/* 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