From: Matthew Wilcox <willy@infradead.org>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Kevin Tian <kevin.tian@intel.com>,
Jason Gunthorpe <jgg@nvidia.com>, Jann Horn <jannh@google.com>,
Vasant Hegde <vasant.hegde@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@intel.com>,
Alistair Popple <apopple@nvidia.com>,
Peter Zijlstra <peterz@infradead.org>,
Uladzislau Rezki <urezki@gmail.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Andy Lutomirski <luto@kernel.org>, Yi Lai <yi1.lai@intel.com>,
iommu@lists.linux.dev, security@kernel.org, x86@kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: Re: [PATCH v5 1/8] mm: Add a ptdesc flag to mark kernel page tables
Date: Wed, 8 Oct 2025 20:56:51 +0100 [thread overview]
Message-ID: <aObCAwbf1-Sxepni@casper.infradead.org> (raw)
In-Reply-To: <20250919054007.472493-2-baolu.lu@linux.intel.com>
On Fri, Sep 19, 2025 at 01:39:59PM +0800, Lu Baolu wrote:
> +static inline void ptdesc_set_kernel(struct ptdesc *ptdesc)
> +{
> + struct folio *folio = ptdesc_folio(ptdesc);
> +
> + folio_set_referenced(folio);
> +}
So this was the right way to do this at the time. However, if you look
at commit 522abd92279a this should now be ...
enum pt_flags {
PT_reserved = PG_reserved,
+ PT_kernel = PG_referenced,
/* High bits are used for zone/node/section */
};
[...]
+static inline void ptdesc_set_kernel(struct ptdesc *ptdesc)
+{
+ set_bit(PT_kernel, &pt->pt_flags.f);
+}
(etc)
next prev parent reply other threads:[~2025-10-08 19:57 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-19 5:39 [PATCH v5 0/8] Fix stale IOTLB entries for kernel address space Lu Baolu
2025-09-19 5:39 ` [PATCH v5 1/8] mm: Add a ptdesc flag to mark kernel page tables Lu Baolu
2025-10-08 19:56 ` Matthew Wilcox [this message]
2025-10-11 6:24 ` Baolu Lu
2025-09-19 5:40 ` [PATCH v5 2/8] mm: Actually mark kernel page table pages Lu Baolu
2025-10-09 19:19 ` David Hildenbrand
2025-10-13 7:17 ` Mike Rapoport
2025-09-19 5:40 ` [PATCH v5 3/8] x86/mm: Use 'ptdesc' when freeing PMD pages Lu Baolu
2025-10-09 19:25 ` David Hildenbrand
2025-10-09 19:31 ` Dave Hansen
2025-10-11 6:26 ` Baolu Lu
2025-09-19 5:40 ` [PATCH v5 4/8] mm: Introduce pure page table freeing function Lu Baolu
2025-10-09 19:26 ` David Hildenbrand
2025-10-13 7:24 ` Mike Rapoport
2025-09-19 5:40 ` [PATCH v5 5/8] x86/mm: Use pagetable_free() Lu Baolu
2025-09-24 12:40 ` Jason Gunthorpe
2025-10-09 19:26 ` David Hildenbrand
2025-10-13 7:28 ` Mike Rapoport
2025-09-19 5:40 ` [PATCH v5 6/8] mm: Introduce deferred freeing for kernel page tables Lu Baolu
2025-10-09 19:28 ` David Hildenbrand
2025-10-09 19:32 ` Dave Hansen
2025-10-10 15:47 ` David Hildenbrand
2025-10-11 6:30 ` Baolu Lu
2025-09-19 5:40 ` [PATCH v5 7/8] mm: Hook up Kconfig options for async page table freeing Lu Baolu
2025-09-19 5:40 ` [PATCH v5 8/8] iommu/sva: Invalidate stale IOTLB entries for kernel address space Lu Baolu
2025-09-25 20:24 ` [PATCH v5 0/8] Fix " Dave Hansen
2025-10-08 19:42 ` Dave Hansen
2025-10-09 19:16 ` David Hildenbrand
2025-10-14 13:21 ` Baolu Lu
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