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 2AE5C58596D for ; Fri, 11 Sep 2026 19:54:59 +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=1789156506; cv=none; b=GjOlxBmYO2KLuVyWNqMadhPx+RVfzqNPScx8dIRf81o20WUJlrwQfb1f+vvWjVWMTQeUHMJV+zYKYjv1kgS+LEytLuhyZfdmguq4ljWMfoycKrzu84ruW48maTHulBkKLiw8NEBTtLFrmjAcHJ+wK757dYmp4Mt3NaNeaP6QcP4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789156506; c=relaxed/simple; bh=u0Jxlm7p/Gt7uJPpyqPxk1VHEUCc3aIXpkJLXNWgiaA=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=boy4iJz+IscW3i+FGreym9gBkQiQkDDc8zBF9EnjlZknI1/I6dwKG8Wj0Yza8iS0wAs8Hgz/1IvtJ3nXYH+BXfFME9CYqfyuUpHA/Nys7F6w5MJPgg3az8F5j+/QNA2WZWsDDGuTbPUkLoTsP9mLrH5w8DFmfTuduNuSY05Fh64= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BICJEBo4; 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="BICJEBo4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A3A11F00893; Fri, 11 Sep 2026 19:54:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789156496; bh=u0Jxlm7p/Gt7uJPpyqPxk1VHEUCc3aIXpkJLXNWgiaA=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=BICJEBo4RnJdkwuu2v7Wd0RzT/mKvNV+Sq5KxPd1c1SHp2bQgILd+GmthD+mjREkq dlG4gGUON5OZv0BhMpDID19AUh/cfV0A7OcW5r0MT02BHVBYsrNzpV3jweOrqJKj/U 6CzLAaEobC2EeLsjWnIKgHCVWX5L4k5qwhsHSOtTVVjR/N2PeS+lPwSWVOqD/NSpn2 VNSMji3/ys3XyD8Lm6YY4BeCT66cdp0RWViPht9Y/eP0db/d7Vo2I82m5bXEwXCVHf eRdx+66i5bHWc0Uor3qHK4z4mK6Fd9sXd0EqsJtIJ0ztXBdsqkoQTJOeZqtH/2MauH sLFOFf5UujthA== From: sashiko-bot@kernel.org Subject: Re: [PATCH v3 12/12] mm: change the contract for free_pgtables(), update docs Reply-To: sashiko-reviews@lists.linux.dev To: =?utf-8?b?TG9yZW56byBTdG9ha2VzIChBUk0p?= Cc: "Christian Borntraeger" , "Vasily Gorbik" , "Alexander Gordeev" , linux-s390@vger.kernel.org, "Heiko Carstens" In-Reply-To: <20260911-rcu-pagetable-freeing-v3-12-7b8c86103821@kernel.org> References: <20260911-rcu-pagetable-freeing-v3-0-7b8c86103821@kernel.org> <20260911-rcu-pagetable-freeing-v3-12-7b8c86103821@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 11 Sep 2026 19:54:55 +0000 Message-Id: <20260911195456.5A3A11F00893@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > Now that page tables are freed after an RCU grace period, it is safe for > read-only page table walkers to walk page table ranges that are being > concurrently torn down, provided the mm is kept alive via mmgrab(). >=20 > It is however unsafe for writers to do so, as they must obtain an > appropriate lock to do so safely. >=20 > Update the pte_offset_map_lock()'s comment block to reflect this. >=20 > Similarly update the process addresses documentation. >=20 > Acked-by: Kiryl Shutsemau (Meta) > Signed-off-by: Lorenzo Stoakes (ARM) Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260911-rcu-pageta= ble-freeing-v3-0-7b8c86103821@kernel.org?part=3D12