From: "David Hildenbrand (Red Hat)" <david@kernel.org>
To: Mostafa Saleh <smostafa@google.com>,
linux-mm@kvack.org, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Cc: corbet@lwn.net, joro@8bytes.org, will@kernel.org,
robin.murphy@arm.com, akpm@linux-foundation.org, vbabka@suse.cz,
surenb@google.com, mhocko@suse.com, jackmanb@google.com,
hannes@cmpxchg.org, ziy@nvidia.com, lorenzo.stoakes@oracle.com,
Liam.Howlett@oracle.com, rppt@kernel.org, xiaqinxin@huawei.com,
baolu.lu@linux.intel.com, rdunlap@infradead.org
Subject: Re: [PATCH 0/2] iommu: debug-pagealloc: Remove pfn_valid() usage
Date: Mon, 19 Jan 2026 15:26:57 +0100 [thread overview]
Message-ID: <bca59694-6b09-4839-8577-c8ac4420eb56@kernel.org> (raw)
In-Reply-To: <20260119142246.3821052-1-smostafa@google.com>
On 1/19/26 15:22, Mostafa Saleh wrote:
> This is a small fix for the new config IOMMU_DEBUG_PAGEALLOC based
> on the discussion:
> https://lore.kernel.org/linux-iommu/CAFgf54pBAUm3ao-UJksiuGKtvv4wzRyFq_uKwLe0H1ettO4DLQ@mail.gmail.com/
>
> Where it was concluded that pfn_valid() is not enough to validate
> physical addresses before access to page_ext.
>
> The first patch introduces a new function in page_ext that takes a
> physical address as an argument, and the second patch uses it instead
> of calling pfn_valid() and phys_to_page()
>
> Benchmarks with the new implementation can be found in:
> https://lore.kernel.org/linux-iommu/20260114164322.787125-1-smostafa@google.com/
>
> This series applies to iommu/core tree.
This is part of v7 [1], right? Can't we just apply v7 instead or are the
commit IDs already stable?
[1] https://lkml.kernel.org/r/20260114164322.787125-1-smostafa@google.com
--
Cheers
David
next prev parent reply other threads:[~2026-01-19 14:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-19 14:22 Mostafa Saleh
2026-01-19 14:22 ` [PATCH 1/2] mm/page_ext: Add page_ext_get_phys() Mostafa Saleh
2026-01-19 15:48 ` Jörg Rödel
2026-01-19 15:55 ` Mostafa Saleh
2026-01-19 14:22 ` [PATCH 2/2] iommu: debug-pagealloc: Use page_ext_get_phys() Mostafa Saleh
2026-01-19 14:26 ` David Hildenbrand (Red Hat) [this message]
2026-01-19 15:09 ` [PATCH 0/2] iommu: debug-pagealloc: Remove pfn_valid() usage Mostafa Saleh
2026-01-19 15:16 ` David Hildenbrand (Red Hat)
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