From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3033C54723; Sun, 12 Jul 2026 11:15:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783854918; cv=none; b=VusMU+yvvnsrVDNMQjAXFVF8m22HroTYeWdMb4+O3JvH7NWYVZ01YvKD4TRJNjT3vo7d4I112E0EjKqVgNTIpbBqaw+qp5NsFm1Alwz05bP+OmLdTgPeY5r5OQJJ4ALwusWlLBrkXtDg4Fmp5WsmsG6r94TW+WKldlZSN8o+oro= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783854918; c=relaxed/simple; bh=Vcd4S0/n1YBbjJkz56jbHGzwyr7k7DTjasJ05V+hMWw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=F41P6AQbK/Tqd4kkLHeqka49gi3DJxCWEepz2aleb0EOEt2d6T0R4Ex/rDsgrdPYU8aU5bPpj1UeXVAUFwBbrl4IfUI7EgOKJSlPr3pw2y5P3ePO4ECHhZy1ZpDCsp6/h9xmsUOPX9HkY/YVymTbwh+JOcZa2ti8L6RXTtXtU+c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=nNp3n2hP; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="nNp3n2hP" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DEBC31682; Sun, 12 Jul 2026 04:15:10 -0700 (PDT) Received: from [10.163.128.224] (unknown [10.163.128.224]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2C6C83F85F; Sun, 12 Jul 2026 04:15:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1783854915; bh=Vcd4S0/n1YBbjJkz56jbHGzwyr7k7DTjasJ05V+hMWw=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=nNp3n2hPRF8jFhWCZX6wCuIbywwiB3hYynuZDcOYT44BI3Z4iB+WamOKaMhu7Ztkm aoEdfHGxwxX+AoMnBbwN1J2wesaWqnIwAMByMteWUpiVRBSOApwddXXMZIzJyah/iQ jM7CyliCS7kY/pAOTFvQv0J3UCJFdtZjR+aYOmNU= Message-ID: <91dbf255-a549-42e1-846a-a9c4d290fa2c@arm.com> Date: Sun, 12 Jul 2026 16:45:06 +0530 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 1/2] mm/vmalloc: acquire init_mm read lock on huge vmap promotion To: Greg KH Cc: Lorenzo Stoakes , Andrew Morton , Suren Baghdasaryan , "Liam R. Howlett" , Vlastimil Babka , Shakeel Butt , David Hildenbrand , Mike Rapoport , Michal Hocko , Uladzislau Rezki , Toshi Kani , Catalin Marinas , Will Deacon , David Carlier , Ryan Roberts , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, stable@vger.kernel.org, syzbot+fd95a72470f5a44e464c@syzkaller.appspotmail.com References: <20260710-series-vmap-race-fix-v1-0-5b3794c113fe@kernel.org> <20260710-series-vmap-race-fix-v1-1-5b3794c113fe@kernel.org> <2026071252-sweep-quirk-a068@gregkh> Content-Language: en-US From: Dev Jain In-Reply-To: <2026071252-sweep-quirk-a068@gregkh> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 12/07/26 1:31 pm, Greg KH wrote: > On Sun, Jul 12, 2026 at 01:13:12PM +0530, Dev Jain wrote: >> >> >> [-----] >> >>> We also define a guard class for mmap_read_trylock() so we can use >>> cleanup.h to make the scope handling cleaner in the implementation. >>> >> >> Will this cause backport problems, I think this scoped guard thingy is >> not that old? > > Don't worry about stable issues until after the fact. Fix things > properly in Linus's tree first. > > And scoped guard has been backported to many of the LTS branches > already. Nice, thanks. > > thanks, > > greg k-h