From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18])
	(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 136792D978C
	for <linux-kernel@vger.kernel.org>; Thu, 28 May 2026 14:03:19 +0000 (UTC)
Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18
ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;
	t=1779977001; cv=none; b=Zu1cQj1yY/q30un1aQ7UjRuXbHl91j/kvCZvMPTPekGvjV16Bu9qTH9uYAwSCl9zsObERE7ZVKhuus96W9IXcFYAuCh9MkVZcz5QF8mOJC10eSv6PllmEyt6OgiXvwNX4x6canZYahDw2epQp586LAv7LSr9xfdRMHvm7dbJiwE=
ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org;
	s=arc-20240116; t=1779977001; c=relaxed/simple;
	bh=zeihJpmAmpXPJncWZn/obiUeWPMYy6Vhj56RR1ngXnE=;
	h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version:
	 Content-Type:Content-Disposition:In-Reply-To; b=L418MLSA7UAJf942ed3DUPpimAxjsTznVSAr6Pq2NZndVOoodMyodTe+eg2jTDJXJEqFUa4OUiB8ht6b2EqNZfPPBRidoC1EUyzq5oNqeqCD2QITHId3G/6XpCQpNECHPaA8aO/bq7pIZL44JIud/bC4DdsA09E6oUSQIdkfYG8=
ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HiVW2yH3; arc=none smtp.client-ip=100.103.45.18
Authentication-Results: smtp.subspace.kernel.org;
	dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HiVW2yH3"
Received: by smtp.kernel.org (Postfix) with ESMTPSA id 787BC1F000E9;
	Thu, 28 May 2026 14:03:16 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org;
	s=k20260515; t=1779976999;
	bh=XpxnCGqlRrEHebmmwDWgQQACrD5dqRhOE4/6MV1vagI=;
	h=Date:From:To:Cc:Subject:References:In-Reply-To;
	b=HiVW2yH3s3ZBqVBJKx8WVnShIc8H+iOmdkAIwz/pS9P/L4tlr6mcwfQqj5HFjiw0/
	 VXn7u3UxK5MIvAkm8T3BYsm0AhwEyl9gt0txfouQ1IJFyaymSWk9k6bJaF414YulV5
	 LuQj9pmWe/SoUOcX2B4mJSlxWFVO8q88auVe8fLmDbYtzOKxYmPJ6cVHpLe3lumO+1
	 uwzu5T2OHSY8TwZxn++EQKNsFEoSom68JvLQzekGrPx/6teBT4HH8SgL1Xhg2gYPRd
	 b7F9/I9rVBj6Vxfxfd+88U+QRR4JC9PB/KuDA9qcWtvvrC9XFLIFZqqgl0TpmR/tyq
	 ef/SgEshS+0Mw==
Date: Thu, 28 May 2026 16:03:12 +0200
From: "Oscar Salvador (SUSE)" <osalvador@kernel.org>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Karsten Desler <kdesler@soohrt.org>, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [REGRESSION] x86/hugetlb: AMD F15h VA alignment offset breaks
 MAP_HUGETLB alignment
Message-ID: <ahhLIOB7u210pjfA@localhost.localdomain>
References: <20260527143643.GO31091@soohrt.org>
 <ahcTYufV7P5Cmotq@localhost.localdomain>
 <ahc31AChKqnfItHW@localhost.localdomain>
 <5f70e840-9d0e-4cef-8574-b355cf26e0c4@intel.com>
 <ahfWdMdxX68ni4ZM@localhost.localdomain>
 <ahg4zTSRK6THd2yP@localhost.localdomain>
Precedence: bulk
X-Mailing-List: linux-kernel@vger.kernel.org
List-Id: <linux-kernel.vger.kernel.org>
List-Subscribe: <mailto:linux-kernel+subscribe@vger.kernel.org>
List-Unsubscribe: <mailto:linux-kernel+unsubscribe@vger.kernel.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <ahg4zTSRK6THd2yP@localhost.localdomain>

On Thu, May 28, 2026 at 02:45:01PM +0200, Oscar Salvador (SUSE) wrote:
> The only thing bugging is, should not the same happen for THP-file-backed mappings?

Aha, no, for THP we do not set align_mask (at least on x86), and the masking off is being
done in __thp_get_unmapped_area().

 

-- 
Oscar Salvador
SUSE Labs