From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Leonardo Bras <leobras.c@gmail.com>
Cc: "Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <skhan@linuxfoundation.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Ingo Molnar" <mingo@redhat.com>, "Will Deacon" <will@kernel.org>,
"Boqun Feng" <boqun@kernel.org>,
"Waiman Long" <longman@redhat.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"David Hildenbrand" <david@kernel.org>,
"Lorenzo Stoakes" <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
"Vlastimil Babka" <vbabka@kernel.org>,
"Mike Rapoport" <rppt@kernel.org>,
"Suren Baghdasaryan" <surenb@google.com>,
"Michal Hocko" <mhocko@suse.com>, "Jann Horn" <jannh@google.com>,
"Pedro Falcato" <pfalcato@suse.de>,
"Brendan Jackman" <jackmanb@google.com>,
"Johannes Weiner" <hannes@cmpxchg.org>, "Zi Yan" <ziy@nvidia.com>,
"Harry Yoo" <harry@kernel.org>, "Hao Li" <hao.li@linux.dev>,
"Christoph Lameter" <cl@gentwo.org>,
"David Rientjes" <rientjes@google.com>,
"Roman Gushchin" <roman.gushchin@linux.dev>,
"Chris Li" <chrisl@kernel.org>,
"Kairui Song" <kasong@tencent.com>,
"Kemeng Shi" <shikemeng@huaweicloud.com>,
"Nhat Pham" <nphamcs@gmail.com>, "Baoquan He" <bhe@redhat.com>,
"Barry Song" <baohua@kernel.org>,
"Youngjun Park" <youngjun.park@lge.com>,
"Qi Zheng" <qi.zheng@linux.dev>,
"Shakeel Butt" <shakeel.butt@linux.dev>,
"Axel Rasmussen" <axelrasmussen@google.com>,
"Yuanchu Xie" <yuanchu@google.com>, "Wei Xu" <weixugc@google.com>,
"Borislav Petkov (AMD)" <bp@alien8.de>,
"Randy Dunlap" <rdunlap@infradead.org>,
"Feng Tang" <feng.tang@linux.alibaba.com>,
"Dapeng Mi" <dapeng1.mi@linux.intel.com>,
"Kees Cook" <kees@kernel.org>, "Marco Elver" <elver@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Li RongQing" <lirongqing@baidu.com>,
"Eric Biggers" <ebiggers@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
"Nathan Chancellor" <nathan@kernel.org>,
"Nicolas Schier" <nsc@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Thomas Weißschuh" <thomas.weissschuh@linutronix.de>,
"Thomas Gleixner" <tglx@kernel.org>,
"Douglas Anderson" <dianders@chromium.org>,
"Gary Guo" <gary@garyguo.net>,
"Christian Brauner" <brauner@kernel.org>,
"Pasha Tatashin" <pasha.tatashin@soleen.com>,
"Coiby Xu" <coxu@redhat.com>,
"Masahiro Yamada" <masahiroy@kernel.org>,
"Frederic Weisbecker" <frederic@kernel.org>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-rt-devel@lists.linux.dev,
"Marcelo Tosatti" <mtosatti@redhat.com>
Subject: Re: [PATCH v4 3/4] swap: apply new pw_queue_on() interface
Date: Mon, 13 Jul 2026 09:31:58 +0200 [thread overview]
Message-ID: <20260713073158.CHjwei-N@linutronix.de> (raw)
In-Reply-To: <alQKlBaKIOAxMzc2@WindFlash>
On 2026-07-12 18:43:48 [-0300], Leonardo Bras wrote:
> > I thought that this improved since commit
> > ff042f4a9b050 ("mm: lru_cache_disable: replace work queue synchronization with synchronize_rcu")
> >
> > Did it get worse or was it not entirely gone?
> >
>
> I worked in this patchset majorly after that commit date, and it was still
> an issue up to last time Marcelo tested. Not sure of the impact of above
> commit, but I suppose it may have brought some improvements without fully
> fixing it.
It would be good to know what is still missing and maybe it can be
addressed without introducing this remote locking.
> Thanks!
> Leo
Sebastian
next prev parent reply other threads:[~2026-07-13 7:32 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-19 1:27 [PATCH v4 0/4] Introduce Per-CPU Work helpers (was QPW) Leonardo Bras
2026-05-19 1:27 ` [PATCH v4 1/4] Introducing pw_lock() and per-cpu queue & flush work Leonardo Bras
2026-05-20 10:08 ` Frederic Weisbecker
2026-07-12 20:49 ` Leonardo Bras
2026-05-20 13:48 ` Sebastian Andrzej Siewior
2026-05-20 14:47 ` Frederic Weisbecker
2026-07-12 21:17 ` Leonardo Bras
2026-07-12 21:17 ` Leonardo Bras
2026-05-20 22:06 ` Randy Dunlap
2026-07-12 21:23 ` Leonardo Bras
2026-05-26 19:15 ` Jonathan Corbet
2026-07-12 21:32 ` Leonardo Bras
2026-05-19 1:27 ` [PATCH v4 2/4] mm/swap: move bh draining into a separate workqueue Leonardo Bras
2026-05-19 1:27 ` [PATCH v4 3/4] swap: apply new pw_queue_on() interface Leonardo Bras
2026-05-20 15:07 ` Sebastian Andrzej Siewior
2026-07-12 21:43 ` Leonardo Bras
2026-07-13 7:31 ` Sebastian Andrzej Siewior [this message]
2026-07-13 21:28 ` Leonardo Bras
2026-05-19 1:27 ` [PATCH v4 4/4] slub: " Leonardo Bras
2026-05-19 10:21 ` kernel test robot
2026-05-20 14:53 ` Sebastian Andrzej Siewior
2026-07-12 22:35 ` Leonardo Bras
2026-07-13 7:36 ` Sebastian Andrzej Siewior
2026-07-13 10:55 ` Vlastimil Babka (SUSE)
2026-07-13 21:44 ` Leonardo Bras
2026-07-13 21:40 ` Leonardo Bras
2026-05-19 6:58 ` [syzbot ci] Re: Introduce Per-CPU Work helpers (was QPW) syzbot ci
2026-05-20 13:09 ` [PATCH v4 0/4] " Sebastian Andrzej Siewior
2026-07-12 20:32 ` Leonardo Bras
2026-07-13 8:07 ` Sebastian Andrzej Siewior
2026-07-13 21:17 ` Leonardo Bras
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