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 4E14E3CA4A3; Wed, 29 Apr 2026 13:14:03 +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=1777468443; cv=none; b=cbOUcweOpgu0E72p+UgepcVG4wzZBrwEWkQQEJDlWeDnsEIGMa0TC3B/PXUJp0e+tqYj2HZR1yRYCV7T/qfWlDW6FjeuY8YGrt7urlmJHBjrunvvL3aBSnjWo/saElE0R298ZsvoNAMvkbBOfKAssvqz44S3bHJWHEoun4GLDgQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777468443; c=relaxed/simple; bh=Ln+lOviPC8lyDW1Zl7BSxk4DMjngJAfX53+OE8S4du8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=e9KW4yBeXNQLARC2ccF4M9Sw6zQbEGzhVy6jjX9woXD1/ohH1gT6STgBVTmfr4ZD1Wb6zECbkZvy+fLimfMBY/o07owlxSi3hlZg8kWRHltuaG+X/DGuC3hnhQN6DHLNGR+dHqIl/L7cl6c1qki9IUXhw4AhoaphhuWGW4FjMW0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=p4mPOguf; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="p4mPOguf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A4052C19425; Wed, 29 Apr 2026 13:14:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777468443; bh=Ln+lOviPC8lyDW1Zl7BSxk4DMjngJAfX53+OE8S4du8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=p4mPOgufJeMY1q3K5t4lY4ia227BGcQML437KJAShhLTaJE4dvY7JzvwA8ZSKOAjv U3RC8RR9jDPKYhcceCIZMp5zboMKNCio0KKszuU8A37WWML2XCXZsTL8rZjGP77QSm MJBqajJ7yUUOkboXc5Sdjjjz7PiEwKYO53J/8iiqanCfXwJqwDUWHBj1N5rD5ybZv3 775EB4OU/J+2Cy1OKIRUpCM/LrxLxXrO3UcwiX50mnDokCPbiPUgLPTSD4e0hT0CQ2 5thn/2pM38O+m1Mgp7kEV7WAg/LkjXc8LO4pkG5NbuFUVk6603ScyvrcQrpLwpFL8I vPCBxx61zcNaQ== Message-ID: <69bb12b1-386b-41e4-ac98-9d545818d67d@kernel.org> Date: Wed, 29 Apr 2026 15:14:00 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5] selftests/mm: khugepaged: initialize file contents via mmap To: Vineet Agarwal , akpm@linux-foundation.org, ljs@kernel.org, shuah@kernel.org Cc: ziy@nvidia.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260429115816.98824-1-agarwal.vineet2006@gmail.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 4/29/26 13:58, Vineet Agarwal wrote: > file_setup_area() currently allocates anonymous memory, fills it, > and writes it into the backing file used for collapse testing. > > Instead of copying data through write(), resize the file with > ftruncate(), map it directly with MAP_SHARED, and initialize the > mapped area in place. > > This simplifies the setup path and avoids the need for explicit > partial write handling. > > Signed-off-by: Vineet Agarwal Acked-by: David Hildenbrand (Arm) Thanks! :) -- Cheers, David