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 BCE0F155345; Wed, 23 Oct 2024 23:12:07 +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=1729725128; cv=none; b=t1vKbvpCWF9aPGQCDM7vhEJAlXDgIYdChm5bIpDQfBxvZDNofUkLjSYtgOOzcAKk1XoOpm/+m4KbjD4zw4o4OSTm6rNHfgzjp4v1TjyltGedupuQ4VggpdxmbqBF5epspuJ0iiCHL+AWQK/mUx/DjgKsFocMn00m571ISgXfy/E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729725128; c=relaxed/simple; bh=Xv3OkoVC+KcKBKqBTXxL8TjiJXtnkAaQxtterVVAUDo=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=RCUOqlE92Jpk3OwP3rT2LGBVJ4DHKUP/z4g5yRzkow5LrGDOszI4NldO9eg+iKcuTcdE/LpnufCg3PRrCI4K3/iyonzRKVsv6ax3Mtl7i/7mnHvpzlmYEuP+bu1o1rR3wXKK8c0G94mypVKYmS5VECkGvD/8V5pj4w8a2YHa9nM= 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=0jXpVYQP; 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="0jXpVYQP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5AA2FC4CEC6; Wed, 23 Oct 2024 23:12:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1729725127; bh=Xv3OkoVC+KcKBKqBTXxL8TjiJXtnkAaQxtterVVAUDo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=0jXpVYQPcu/BWEDQR1MJA6q9T5x9sGey1lE/UhrQvX9BTRgIG1l0bBXUECLpLGANh jLVo3KNOeDYtkPzvcprnjgO2KJuc3gLGrDPb7AMnjmsICYqWMfBZvjgHf8pFMK+gda 0XPn1ddH/ndxfm4XW+YsTXCpfSYJq2PhfKIbUAwc= Date: Wed, 23 Oct 2024 16:12:05 -0700 From: Andrew Morton To: Lorenzo Stoakes Cc: Suren Baghdasaryan , "Liam R . Howlett" , Matthew Wilcox , Vlastimil Babka , "Paul E . McKenney" , Jann Horn , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Muchun Song , Richard Henderson , Matt Turner , Thomas Bogendoerfer , "James E . J . Bottomley" , Helge Deller , Chris Zankel , Max Filippov , Arnd Bergmann , linux-alpha@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-arch@vger.kernel.org, Shuah Khan , Christian Brauner , linux-kselftest@vger.kernel.org, Sidhartha Kumar , Jeff Xu , Christoph Hellwig , linux-api@vger.kernel.org, John Hubbard Subject: Re: [PATCH v3 3/5] mm: madvise: implement lightweight guard page mechanism Message-Id: <20241023161205.003ad735d5f6ec50ec2eb054@linux-foundation.org> In-Reply-To: <415da1e6c5828d96db3af480d243a7f68ccabf6d.1729699916.git.lorenzo.stoakes@oracle.com> References: <415da1e6c5828d96db3af480d243a7f68ccabf6d.1729699916.git.lorenzo.stoakes@oracle.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-api@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 Wed, 23 Oct 2024 17:24:40 +0100 Lorenzo Stoakes wrote: > We permit this operation on anonymous memory only What is the reason for this restriction? (generally, it would be nice to include the proposed manpage update at this time, so people can review it while the code change is fresh in their minds)