From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 454EE18B476; Tue, 28 Jan 2025 06:12:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738044738; cv=none; b=p4r4cVxjiTz+8wBOS3hbfhTnut5LvueWhCvEIvw8m2Xou46KaanJY3hSkkw/GBv97zLVQ7SFK8LDMgkJuFoQAZeHZ+1j9ajnl/mAMn4N6bqzoZmPcubWzIrTST4p2SDVrWXHuNXVGCX++9dgVjTpdTUZzLMa1w0tFVowJ0PMdSk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738044738; c=relaxed/simple; bh=JLZRvtPx01zZ02Bp8wGAIaOL7w4LyZ+P9o5Ndkme27k=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=GAAy6R5mCU1BEZ2Pc/o+5wwor7rVUkl+GPh15+CuIfAQ7LohbEnYZq1NSi/fvT4Lm+fe97DDJLOhnSCtslVxMGxRJijxteHVExjYd6VWENNxhYWo8hbatQaYvQapnvoBnO8a8mMLnYfNDlv9NqLOtxFeuH2zB4hjFTn7y8aWOg4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=d46jtVwr; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="d46jtVwr" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=xpq0EzznBsykUuruz4uXaOlJN+LKQNMON88eEeJONJ4=; b=d46jtVwrm7L+V7m3wvZM2xQGAk Q0dEQl6ZBqvJMmVNqAx+clFFc7Xy4ECPalPCgl1U/8zlKjtTjpa76KWpmBr8ACOHvEJFewwxkvgbi CDEX75YTHfqOclu+9RQenq7sOQkAAKQoGb5ncTOC2LHKd3kaaelhet5ACjVrRrGYW18SAzU2hdu7y VOeKjRJkMVV6gq6lCSwsH5NKrWX4/dDBneQx0Q34rrgXB36SZNWSKJAhiIhu0laSCYgbCnfan4GQd phn5CjzqGSXl/dYGOE7lH2u/OmOPCWcJyjgrA/gm8klELE8eLoY3nmrdKFHeIMv6ymf9LO2Srz6a+ 4t7y5oKg==; Received: from hch by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tcepU-00000004C7D-0hfc; Tue, 28 Jan 2025 06:12:08 +0000 Date: Mon, 27 Jan 2025 22:12:08 -0800 From: Christoph Hellwig To: Yunsheng Lin Cc: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, zhangkun09@huawei.com, liuyonglong@huawei.com, fanghaiqing@huawei.com, Robin Murphy , Alexander Duyck , IOMMU , Andrew Morton , Eric Dumazet , Simon Horman , Jesper Dangaard Brouer , Ilias Apalodimas , linux-mm@kvack.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [RFC v8 3/5] page_pool: fix IOMMU crash when driver has already unbound Message-ID: References: <20250127025734.3406167-1-linyunsheng@huawei.com> <20250127025734.3406167-4-linyunsheng@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250127025734.3406167-4-linyunsheng@huawei.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Mon, Jan 27, 2025 at 10:57:32AM +0800, Yunsheng Lin wrote: > Note, the devmem patchset seems to make the bug harder to fix, > and may make backporting harder too. As there is no actual user > for the devmem and the fixing for devmem is unclear for now, > this patch does not consider fixing the case for devmem yet. Is there another outstanding patchet? Or do you mean the existing devmem code already merged? If that isn't actually used it should be removed, but otherwise you need to fix it.