From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F420F7494; Fri, 26 Jan 2024 02:04:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706234673; cv=none; b=F9oV8HOYRWBb9b8S4AYtjCkZPwoVaQnNAXtuvoKRufm0w0EPj/sQQkBSFN6SbOHaOr/8NIDXzWa8GMHx38iDYhwT+M/f2uBUCbGxwM+FCQaWUlOBVihMDVEtPVfnV0FfpVhQvwIwEmHO9OFUbWfq9ongPAZA192F2h2XcC0lrUU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706234673; c=relaxed/simple; bh=HWEos3+udILzj8RZ/TTxlduuwOKMV4VQFbTq8RZGoPM=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=TUNzMVTkMhXco5CY88G3U+j+BjwIx8fvemSPMTMifKuDTBZLDYNJU1XYzWCPXq1u20XuY6lo/JLx8UWTQ6iISIPn1m2JwF6AS6X8bifH5q/f4MRjsdXrVVj5BLDbYAe4P9n1+KvQTDQuz0z7DtqOCKKpFy94fXI6DT7rEyhGwEM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=tuc+1XPr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="tuc+1XPr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 74479C433C7; Fri, 26 Jan 2024 02:04:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1706234672; bh=HWEos3+udILzj8RZ/TTxlduuwOKMV4VQFbTq8RZGoPM=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=tuc+1XPr+hUVWa4GOyLQhEugYXMMsybYvWuE0/xs82eeqs83luvv7hWozsTjDEJU2 xqH+oihlu/t9Hy0Adp3wCLYFeU2IG8f5LdvEXo7yJ7AqNEu5svDOvx1sFx40QZHZup Q5dVW0OiqBacQI7MjfRyUJZIaPhBJ+rifm367ymU= Date: Thu, 25 Jan 2024 18:04:24 -0800 From: Andrew Morton To: Suren Baghdasaryan Cc: willy@infradead.org, will@kernel.org, catalin.marinas@arm.com, palmer@dabbelt.com, mpe@ellerman.id.au, christophe.leroy@csgroup.eu, agordeev@linux.ibm.com, gerald.schaefer@linux.ibm.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, Russell King Subject: Re: [PATCH 1/1] arch/arm/mm: fix major fault accounting when retrying under per-VMA lock Message-Id: <20240125180424.121455beae4d56799a0bac28@linux-foundation.org> In-Reply-To: <20240123064305.2829244-1-surenb@google.com> References: <20240123064305.2829244-1-surenb@google.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 22 Jan 2024 22:43:05 -0800 Suren Baghdasaryan wrote: > The change [1] missed ARM architecture when fixing major fault accounting > for page fault retry under per-VMA lock. Add missing code to fix ARM > architecture fault accounting. > > [1] 46e714c729c8 ("arch/mm/fault: fix major fault accounting when retrying under per-VMA lock") > > Fixes: 12214eba1992 ("mm: handle read faults under the VMA lock") What are the userspace-visible runtime effects of this change? Is a cc:stable backport desirable? > Reported-by: Russell King (Oracle) > Signed-off-by: Suren Baghdasaryan