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Date: Tue, 20 Feb 2024 21:20:28 +0100
From: Greg KH <gregkh@linuxfoundation.org>
To: Suren Baghdasaryan <surenb@google.com>
Cc: stable@vger.kernel.org, Russell King <rmk+kernel@armlinux.org.uk>,
	Alexander Gordeev <agordeev@linux.ibm.com>,
	Andy Lutomirski <luto@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Christophe Leroy <christophe.leroy@csgroup.eu>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
	Matthew Wilcox <willy@infradead.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Will Deacon <will@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 2/2] arch/arm/mm: fix major fault accounting when
 retrying under per-VMA lock
Message-ID: <2024022018-guidance-patio-4504@gregkh>
References: <2024021921-bleak-sputter-5ecf@gregkh>
 <20240220190351.39815-1-surenb@google.com>
 <20240220190351.39815-2-surenb@google.com>
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In-Reply-To: <20240220190351.39815-2-surenb@google.com>

On Tue, Feb 20, 2024 at 11:03:51AM -0800, Suren Baghdasaryan wrote:
> The change [1] missed ARM architecture when fixing major fault accounting
> for page fault retry under per-VMA lock.
> 
> The user-visible effects is that it restores correct major fault
> accounting that was broken after [2] was merged in 6.7 kernel. The
> more detailed description is in [3] and this patch simply adds the
> same fix to ARM architecture which I missed in [3].
> 
> Add missing code to fix ARM architecture fault accounting.
> 
> [1] 46e714c729c8 ("arch/mm/fault: fix major fault accounting when retrying under per-VMA lock")
> [2] https://lore.kernel.org/all/20231006195318.4087158-6-willy@infradead.org/
> [3] https://lore.kernel.org/all/20231226214610.109282-1-surenb@google.com/
> 
> Link: https://lkml.kernel.org/r/20240123064305.2829244-1-surenb@google.com
> Fixes: 12214eba1992 ("mm: handle read faults under the VMA lock")
> Reported-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
> Cc: Alexander Gordeev <agordeev@linux.ibm.com>
> Cc: Andy Lutomirski <luto@kernel.org>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
> Cc: Dave Hansen <dave.hansen@linux.intel.com>
> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
> Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Palmer Dabbelt <palmer@dabbelt.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Will Deacon <will@kernel.org>
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> ---
>  arch/arm/mm/fault.c | 2 ++
>  1 file changed, 2 insertions(+)

No git id?  :(