From: Baolu Lu <baolu.lu@linux.intel.com>
To: Dave Hansen <dave.hansen@intel.com>,
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>,
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>,
David Hildenbrand <david@redhat.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>, Mike Rapoport <rppt@kernel.org>,
Michal Hocko <mhocko@kernel.org>,
Matthew Wilcox <willy@infradead.org>
Cc: baolu.lu@linux.intel.com, iommu@lists.linux.dev,
security@kernel.org, x86@kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 0/8] Fix stale IOTLB entries for kernel address space
Date: Tue, 14 Oct 2025 21:21:01 +0800 [thread overview]
Message-ID: <a1883b7d-b5f9-419b-ba51-735a977522d9@linux.intel.com> (raw)
In-Reply-To: <d3cf3716-98ec-419b-90b7-b91b83599498@intel.com>
On 10/9/2025 3:42 AM, Dave Hansen wrote:
> I wondered why no mm folks were commenting on this. linux-mm@ was cc'd,
> but the_people_ on cc seem to have been almost all IOMMU and x86 folks.
> so I added a few mm folks...
>
> On 9/25/25 13:24, Dave Hansen wrote:
>> On 9/18/25 22:39, Lu Baolu wrote:
>>> This solution introduces a deferred freeing mechanism for kernel page
>>> table pages, which provides a safe window to notify the IOMMU to
>>> invalidate its caches before the page is reused.
>> I think all the activity has died down and I everyone seems happy enough
>> with how this looks. Right?
>>
>> So is this something we should prod Andrew to take through the mm tree,
>> or is it x86-specific enough it should go through tip?
> Hi Folks! We've got a bug fix here that has impact on x86, mm, and IOMMU
> code. I know I've talked with a few of you about this along the way, but
> it's really thin on mm reviews, probably because mm folks haven't been
> cc'd. Any eyeballs on it would be appreciated!
>
> It seems like it should_probably_ go through the mm tree, although I'm
> happy to send it through tip if folks disagree.
Thank you all for the review comments. I have updated this series with a
new version and posted it here, with the mm folks cc'ed:
https://lore.kernel.org/linux-iommu/20251014130437.1090448-1-baolu.lu@linux.intel.com/
Thanks,
baolu
prev parent reply other threads:[~2025-10-14 13:21 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
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 [this message]
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