From: "Björn Töpel" <bjorn@kernel.org>
To: Muchun Song <songmuchun@bytedance.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: "David Hildenbrand" <david@kernel.org>,
"Oscar Salvador" <osalvador@suse.de>,
"Dave Hansen" <dave.hansen@intel.com>,
"Paul Walmsley" <pjw@kernel.org>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Alexandre Ghiti" <alex@ghiti.fr>,
"Björn Töpel" <bjorn@rivosinc.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Kevin Brodsky" <kevin.brodsky@arm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Alistair Popple" <apopple@nvidia.com>,
linux-mm@kvack.org, linux-riscv@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
"Muchun Song" <muchun.song@linux.dev>,
"Muchun Song" <songmuchun@bytedance.com>
Subject: Re: [PATCH v2 3/4] riscv/mm: fix missing destructor for hotplug PUD tables
Date: Mon, 12 Oct 2026 17:35:53 +0200 [thread overview]
Message-ID: <87a4ojaq3q.fsf@all.your.base.are.belong.to.us> (raw)
In-Reply-To: <20261010112457.49485-4-songmuchun@bytedance.com>
Muchun Song <songmuchun@bytedance.com> writes:
> Commit 8472cc4503eb ("riscv: mm: call PUD/P4D ctor in special kernel
> pgtable alloc") made alloc_pud_late() run the PUD page-table constructor.
> However, free_pud_table() still frees non-reserved PUD tables directly
> without decrementing NR_PAGETABLE.
>
> Free PUD tables through the common free_pgtable_page() helper so that
> constructor-backed tables run the matching destructor before being
> freed.
>
> Fixes: 8472cc4503eb ("riscv: mm: call PUD/P4D ctor in special kernel pgtable alloc")
> Cc: stable@vger.kernel.org
> Assisted-by: LLM
> Signed-off-by: Muchun Song <songmuchun@bytedance.com>
> Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Björn Töpel <bjorn@kernel.org>
next prev parent reply other threads:[~2026-10-12 15:36 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-10 11:24 [PATCH v2 0/4] mm: Fix page-table teardown during memory hot-remove Muchun Song
2026-10-10 11:24 ` [PATCH v2 1/4] mm: fix missing page-table destructor in pagetable_free() Muchun Song
2026-10-12 11:15 ` Jose A. Perez de Azpillaga
2026-10-12 12:55 ` Muchun Song
2026-10-12 13:27 ` David Hildenbrand (Arm)
2026-10-12 13:29 ` Muchun Song
2026-10-12 14:06 ` Dave Hansen
2026-10-10 11:24 ` [PATCH v2 2/4] riscv/mm: fix hotplug page-table destructor handling Muchun Song
2026-10-12 13:28 ` David Hildenbrand (Arm)
2026-10-12 15:32 ` Björn Töpel
2026-10-10 11:24 ` [PATCH v2 3/4] riscv/mm: fix missing destructor for hotplug PUD tables Muchun Song
2026-10-12 15:35 ` Björn Töpel [this message]
2026-10-10 11:24 ` [PATCH v2 4/4] arm64/mm: fix destructor for unconstructed hotplug page tables Muchun Song
2026-10-12 13:30 ` David Hildenbrand (Arm)
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