From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B9855C636C9 for ; Mon, 19 Jul 2021 12:32:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9DBC061164 for ; Mon, 19 Jul 2021 12:32:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236921AbhGSLvW (ORCPT ); Mon, 19 Jul 2021 07:51:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:60274 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236883AbhGSLvO (ORCPT ); Mon, 19 Jul 2021 07:51:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7E1406113B; Mon, 19 Jul 2021 12:31:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626697914; bh=Fvlwqxv6dtBkcuTBN0WukWjl7VtfhFwYgJ4yPUmzFCs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f7wgN6ozs+p72UTrZkw6fhSq0QhpUUI4leSgu0mSjM8QMdiSylyU8awgzAWqm8kmp ga0vRqnkiA8AsBPwTt/8mOnK3LlJ3MNJG5INTapxgUb0awST0q/+iVXPTnuOSFvWTs MzkhTZZv1a4PyUX0hUEfRqin2fT0um8r4dUODY47Kcm7DdOfD2ub4xGn3dqNrt94wM KkeGOGa78YmV1BBPVBctQY2VGpZI15y/xHYSKJ7158D+Zmhw5FeUn29AXeG4/sJtqK /HLmGeoFgRMPVOD3a9aEUvxuMqcLsswyBSaOlTQuicPEg6ja7kCl/HvooIe+MXnads kkMYe6vFiBP2w== From: Will Deacon To: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org, Will Deacon , Guenter Roeck , Claire Chang , Christoph Hellwig , Robin Murphy , Konrad Rzeszutek Wilk , Nathan Chancellor Subject: [PATCH 4/5] swiotlb: Emit diagnostic in swiotlb_exit() Date: Mon, 19 Jul 2021 13:30:53 +0100 Message-Id: <20210719123054.6844-5-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210719123054.6844-1-will@kernel.org> References: <20210719123054.6844-1-will@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A recent debugging session would have been made a little bit easier if we had noticed sooner that swiotlb_exit() was being called during boot. Add a simple diagnostic message to swiotlb_exit() to complement the one from swiotlb_print_info() during initialisation. Cc: Claire Chang Cc: Christoph Hellwig Cc: Robin Murphy Link: https://lore.kernel.org/r/20210705190352.GA19461@willie-the-truck Suggested-by: Konrad Rzeszutek Wilk Tested-by: Nathan Chancellor Signed-off-by: Will Deacon --- kernel/dma/swiotlb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 7948f274f9bb..b3c793ed9e64 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -334,6 +334,7 @@ void __init swiotlb_exit(void) if (!mem->nslabs) return; + pr_info("tearing down default memory pool\n"); size = array_size(sizeof(*mem->slots), mem->nslabs); if (mem->late_alloc) free_pages((unsigned long)mem->slots, get_order(size)); -- 2.32.0.402.g57bb445576-goog