From: Shakeel Butt <shakeel.butt@linux.dev>
To: Suren Baghdasaryan <surenb@google.com>
Cc: akpm@linux-foundation.org, kent.overstreet@linux.dev,
vbabka@suse.cz, mhocko@suse.com, jackmanb@google.com,
hannes@cmpxchg.org, ziy@nvidia.com, usamaarif642@gmail.com,
00107082@163.com, pasha.tatashin@soleen.com,
souravpanda@google.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] alloc_tag: avoid warnings when freeing non-compound "tail" pages
Date: Thu, 11 Sep 2025 15:58:41 -0700 [thread overview]
Message-ID: <h3njg4vlzeq3nkeoxx47zlq56hzyueq2g5kaoititfrmjizqe3@4yvoyckuszxk> (raw)
In-Reply-To: <20250909233409.1013367-4-surenb@google.com>
On Tue, Sep 09, 2025 at 04:34:09PM -0700, Suren Baghdasaryan wrote:
> When freeing "tail" pages of a non-compount high-order page, we properly
> subtract the allocation tag counters, however later when these pages are
> released, alloc_tag_sub() will issue warnings because tags for these pages
> are NULL.
> This issue was originally anticipated by Vlastimil in his review [1] and
> then recently reported by David.
> Prevent warnings by marking the tags empty.
>
> [1] https://lore.kernel.org/all/6db0f0c8-81cb-4d04-9560-ba73d63db4b8@suse.cz/
>
> Suggested-by: David Wang <00107082@163.com>
> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
prev parent reply other threads:[~2025-09-11 22:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-09 23:34 [PATCH 0/3] Minor fixes for memory allocation profiling Suren Baghdasaryan
2025-09-09 23:34 ` [PATCH 1/3] alloc_tag: use release_pages() in the cleanup path Suren Baghdasaryan
2025-09-10 5:31 ` Shakeel Butt
2025-09-10 20:49 ` Usama Arif
2025-09-12 21:05 ` Suren Baghdasaryan
2025-09-09 23:34 ` [PATCH 2/3] alloc_tag: prevent enabling memory profiling if it was shut down Suren Baghdasaryan
2025-09-10 5:32 ` Shakeel Butt
2025-09-10 20:51 ` Usama Arif
2025-09-11 17:01 ` Suren Baghdasaryan
2025-09-09 23:34 ` [PATCH 3/3] alloc_tag: avoid warnings when freeing non-compound "tail" pages Suren Baghdasaryan
2025-09-11 20:01 ` Shakeel Butt
2025-09-11 20:12 ` Suren Baghdasaryan
2025-09-11 21:44 ` Shakeel Butt
2025-09-11 21:51 ` Suren Baghdasaryan
2025-09-11 22:58 ` Shakeel Butt [this message]
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