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 CCF39534460 for ; Tue, 8 Sep 2026 12:50:55 +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=1788871856; cv=none; b=QQ+P1uD43X6i2B5cwly/5wLQlC5fBMmMV/shLActwErtLg6Jk7xRA12JyF/f560yglkDmttiY5oCQucBdOTToquxTV08aa+S5A1LGDJNP8UBD6S8jBga7v4JWvj4EqUWJlTHUVMhMC62nQB+ZQQbyI6CsTppSJTtKrgbukrQPp0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788871856; c=relaxed/simple; bh=PyoVmegcO0Ngn4H8opMC+lrbYJtNC9Od+Q7itePp3U0=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=ILGHDET1vYurMIuGzrPW5/KlFwrrkQWzKCyf/Ge5eZu0Pk5w+psXTilJaf8/3EOIJiyuSp4xNJjOFoztNgBuPOOY1nGl5MT7341O4tM98sHMQJOpppU90/vfKmjrm6kS99lbpZgunRAyVmC9BEI61JXWmhhE5UhQ///7VtvS+JU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=I7yTc7VQ; 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="I7yTc7VQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3DCF61F00A3D; Tue, 8 Sep 2026 12:50:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788871855; bh=PyoVmegcO0Ngn4H8opMC+lrbYJtNC9Od+Q7itePp3U0=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=I7yTc7VQzEETKjEpGag93h2+MPh59lIqoJueAoPSvqHmbWQI5segLBi35yS5VRDvR re8U2fsQuflrYbuUe9okAqvTI5ecTToC8zPM1yhjHTqLXCDfnbR1tb3Y3bgT+Kn1s/ YoufECkepYbV+CWoHCZ7FArY+3iJVPnM7dC3YeTmuPNwcaUyk2oqUj3N/wnH3+fORa +oQjQ1o4j7BCN0hcaw288NHLDVfwUULhuuJdodFu2/vkLlvI0hZSkhtyFj6Cy5gATf fOSsgVChl/pDu30fXyIFQsC9EHB573LyG0Srgk5vqtksDdbOjfcjNNonYEF31q4xKv Hcs3F+r3aipTQ== From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 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" , linux-s390@vger.kernel.org, "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" In-Reply-To: <20260908-rcu-pagetable-freeing-v2-12-1f60b64e878e@kernel.org> References: <20260908-rcu-pagetable-freeing-v2-0-1f60b64e878e@kernel.org> <20260908-rcu-pagetable-freeing-v2-12-1f60b64e878e@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 08 Sep 2026 12:50:54 +0000 Message-Id: <20260908125055.3DCF61F00A3D@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 > 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/20260908-rcu-pageta= ble-freeing-v2-0-1f60b64e878e@kernel.org?part=3D12