From: Dmitry Ilvokhin <d@ilvokhin.com>
To: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
hawk@kernel.org, Matthew Wilcox <willy@infradead.org>,
linux-mm@kvack.org, Steven Rostedt <rostedt@goodmis.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Zi Yan <ziy@nvidia.com>,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>, Shuah Khan <shuah@kernel.org>,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
kernel-team@cloudflare.com
Subject: Re: [PATCH 1/2] mm/page_alloc: add tracepoints for zone->lock acquisitions
Date: Fri, 8 May 2026 18:07:40 +0000 [thread overview]
Message-ID: <af4mbDB3-ohO5DCp@shell.ilvokhin.com> (raw)
In-Reply-To: <4f61457e-deff-430f-8a1e-d3c33c925db3@kernel.org>
On Fri, May 08, 2026 at 07:40:51PM +0200, Vlastimil Babka (SUSE) wrote:
> On 5/8/26 7:38 PM, Vlastimil Babka (SUSE) wrote:
> > On 5/8/26 7:29 PM, Andrew Morton wrote:
> >> e .configOn Fri, 8 May 2026 18:22:06 +0200 hawk@kernel.org wrote:
> >>
> >>> Add tracepoints to the page allocator fast paths that acquire
> >>> zone->lock, allowing diagnosis of lock contention in production.
> >>
> >> Thanks, I'm surprised we haven't done this yet.
> >
> > There was a recent attempt [1]. Not being a generic solution wasn't welcome.
> >
> > [1] https://lore.kernel.org/all/cover.1772206930.git.d@ilvokhin.com/
>
> And this is the generic solution I think?
>
> https://lore.kernel.org/all/cover.1777999826.git.d@ilvokhin.com/
Thanks for cc'ing me, Vlastimil.
Yes, this is an attempt at a generic solution for tracing contended
locks, including spinlocks, so it should also cover the use case
proposed in this patchset.
In fact, zone->lock contention was one of the primary motivations for
this work.
next prev parent reply other threads:[~2026-05-08 18:07 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-08 16:22 [PATCH 1/2] mm/page_alloc: add tracepoints for zone->lock acquisitions hawk
2026-05-08 16:22 ` [PATCH 2/2] selftests/mm: add zone->lock tracepoint verification test hawk
2026-05-08 20:15 ` David Hildenbrand (Arm)
2026-05-13 15:00 ` Jesper Dangaard Brouer
2026-05-08 17:29 ` [PATCH 1/2] mm/page_alloc: add tracepoints for zone->lock acquisitions Andrew Morton
2026-05-08 17:38 ` Vlastimil Babka (SUSE)
2026-05-08 17:40 ` Vlastimil Babka (SUSE)
2026-05-08 18:07 ` Dmitry Ilvokhin [this message]
2026-05-13 15:32 ` Jesper Dangaard Brouer
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