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,URIBL_BLOCKED,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 D6EC9C07E9B for ; Tue, 20 Jul 2021 13:41:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A797B610C7 for ; Tue, 20 Jul 2021 13:41:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232702AbhGTNBP (ORCPT ); Tue, 20 Jul 2021 09:01:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:57424 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231288AbhGTM6C (ORCPT ); Tue, 20 Jul 2021 08:58:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 27A76611CE; Tue, 20 Jul 2021 13:38:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626788320; bh=IMx3IbZKVqWumlzk+zzCwsBjRHxMO3KKzzyWrJuP4hw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sWQtqGYkEIpAvbvqwuj9mdWRgtJu9R68msQKV1qtpcN/wsj1wj55RxLL39COKvDn+ qMJmJXjgi/ohYEaf3TO0ZSniwMh+/CgrQpIosyyJsWW/eUQudlm4YwiALtnlGORJRh Uq07gOuLGQGbu1gXxGo3Ge0jNf+6fpdsmKQETkLgU4/fFm9zTe4sWnJMcedKCDRt4X g1JDVr2oNvT1P8TiiIJiRavMW7XJmR8xblWCMtLuxpMaeLNYfdCbrPfW57GupWI4hY 51bIm5xUIT2pr28+KYFZmf18JTBUscU1kxiPctR7y64vKjqykK58NgtGcqMNZKWZDG Syi8UTjoqhZuw== 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 v2 3/4] swiotlb: Emit diagnostic in swiotlb_exit() Date: Tue, 20 Jul 2021 14:38:25 +0100 Message-Id: <20210720133826.9075-4-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210720133826.9075-1-will@kernel.org> References: <20210720133826.9075-1-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 Tested-by: Claire Chang Reviewed-by: Christoph Hellwig 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