linux-kernel - Re: [PATCH] arm64/mm: Disable barrier batching in interrupt contexts

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Message-Id: <174722567630.76853.13198140352994941416.b4-ty@kernel.org>
Date: Wed, 14 May 2025 16:14:11 +0100
From: Will Deacon <will@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>,
	Pasha Tatashin <pasha.tatashin@...een.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Uladzislau Rezki <urezki@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	David Hildenbrand <david@...hat.com>,
	"Matthew Wilcox (Oracle)" <willy@...radead.org>,
	Mark Rutland <mark.rutland@....com>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Alexandre Ghiti <alexghiti@...osinc.com>,
	Kevin Brodsky <kevin.brodsky@....com>,
	Ryan Roberts <ryan.roberts@....com>
Cc: kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	syzbot+5c0d9392e042f41d45c5@...kaller.appspotmail.com
Subject: Re: [PATCH] arm64/mm: Disable barrier batching in interrupt contexts

On Mon, 12 May 2025 11:22:40 +0100, Ryan Roberts wrote:
> Commit 5fdd05efa1cd ("arm64/mm: Batch barriers when updating kernel
> mappings") enabled arm64 kernels to track "lazy mmu mode" using TIF
> flags in order to defer barriers until exiting the mode. At the same
> time, it added warnings to check that pte manipulations were never
> performed in interrupt context, because the tracking implementation
> could not deal with nesting.
> 
> [...]

Applied to arm64 (for-next/mm), thanks!

[1/1] arm64/mm: Disable barrier batching in interrupt contexts
      https://git.kernel.org/arm64/c/b81c688426a9

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev