From: Shakeel Butt <shakeel.butt@linux.dev>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Brendan Jackman <jackmanb@google.com>, Zi Yan <ziy@nvidia.com>,
David Hildenbrand <david@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
Mike Rapoport <rppt@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/4] mm: page_alloc: __GFP_FS lockdep annotation for direct compaction
Date: Wed, 1 Jul 2026 17:39:05 -0700 [thread overview]
Message-ID: <akWzEHfvK8PNOZ9G@linux.dev> (raw)
In-Reply-To: <20260626182215.1107966-2-hannes@cmpxchg.org>
On Fri, Jun 26, 2026 at 02:21:17PM -0400, Johannes Weiner wrote:
> A subsequent patch will have some order-0 allocations participate in
> compaction under defrag_mode, to stave off extfrag events.
>
> Since this is a sprawling expansion of entry points, and compaction
> can enter filesystem paths, add lockdep annotations that catches
> __GFP_FS passing errors.
>
> Direct reclaim has had this annotation for a while, and since reclaim
> and compaction are usually used in conjunction, this is unlikely to
> unearth old bugs. It's more about future proofing and peace of mind.
>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
next prev parent reply other threads:[~2026-07-02 0:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-26 18:21 [PATCH 0/4] mm: fix reclaim storms in defrag_mode Johannes Weiner
2026-06-26 18:21 ` [PATCH 1/4] mm: page_alloc: __GFP_FS lockdep annotation for direct compaction Johannes Weiner
2026-07-01 13:45 ` Vlastimil Babka (SUSE)
2026-07-02 0:39 ` Shakeel Butt [this message]
2026-06-26 18:21 ` [PATCH 2/4] mm: compaction: support non-movable compaction for pageblock requests Johannes Weiner
2026-07-01 14:19 ` Vlastimil Babka (SUSE)
2026-07-01 15:28 ` Johannes Weiner
2026-07-01 18:14 ` Vlastimil Babka (SUSE)
2026-07-01 21:11 ` Johannes Weiner
2026-06-26 18:21 ` [PATCH 3/4] mm: page_alloc: move capture_control to the page allocator Johannes Weiner
2026-07-01 18:02 ` Vlastimil Babka (SUSE)
2026-07-01 20:57 ` Johannes Weiner
2026-06-26 18:21 ` [PATCH 4/4] mm: page_alloc: fix non-movable reclaim storm in defrag_mode Johannes Weiner
2026-06-26 18:29 ` Zi Yan
2026-06-26 18:43 ` Johannes Weiner
2026-07-01 18:06 ` Vlastimil Babka (SUSE)
2026-07-01 21:02 ` Johannes Weiner
2026-07-02 0:31 ` [PATCH 0/4] mm: fix reclaim storms " Shakeel Butt
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