From patchwork Wed Nov 25 16:25:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 11931521 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 5B9B5C71156 for ; Wed, 25 Nov 2020 16:26:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D4BA2067C for ; Wed, 25 Nov 2020 16:26:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ffwll.ch header.i=@ffwll.ch header.b="jVHAscAY" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731127AbgKYQZp (ORCPT ); Wed, 25 Nov 2020 11:25:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58094 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731571AbgKYQZo (ORCPT ); Wed, 25 Nov 2020 11:25:44 -0500 Received: from mail-wm1-x344.google.com (mail-wm1-x344.google.com [IPv6:2a00:1450:4864:20::344]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69A07C061A52 for ; Wed, 25 Nov 2020 08:25:44 -0800 (PST) Received: by mail-wm1-x344.google.com with SMTP id a65so2705862wme.1 for ; Wed, 25 Nov 2020 08:25:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=S5C08Hy1XMQFC0buOh9jSFHuZ0iwVVw80p1E5iRWSvg=; b=jVHAscAYlfUZpaUDcWeAN+ImydgMtSo0J4j+H0r2qtoN4JmJx9Vve4jifNb53zuGqi Ho1AFwAoWORedY91OsjnrVbKw6hwQJ2Kv5B8EMyK5Y7KSllnc5Cw2fu9iTZNFFbiKE7V xTc7fqCfuiYJbUWlEUEfD8UXGnYqpwS8fW1sk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=S5C08Hy1XMQFC0buOh9jSFHuZ0iwVVw80p1E5iRWSvg=; b=sBIF4ahb5YkGzRsRMkfhIdpl6yDsWz6nTX4oL39tV5VGGbIwGz9CvPh4bEsSasC/KD cJ0v+IE+qkWgfezuEBmtCQ8AzxAZkLsHW50Kzjg40LzfOkkfpzjTHiR4nNaNmiWNfWQd s8eWCI6pyDnSxA+azrCKueBA0vroNrMN8GeJcAa6i7ymY+CYLPOZllefkC1vXF+mdBoO cCT8boiiSpzm7RQLF2N3IxhDb7PAjQ/OJFZun2DDfe/+eIuk/bZx39SYm5L4ZeGeUDsT V5vIK3Nnt6BKQeEBgsoREcDgiqfVzXrBkx2Vxq61MVuZiJWLM74VSNgjd6zi0OVgFXjy Aoqg== X-Gm-Message-State: AOAM532fAqtoumFo/9A44n+ZZ2Vo2KKqwOGJ0t2HfNRKU3GzeFdIM34i fyA5JFToikcFNNm6RS1QKNeD6A== X-Google-Smtp-Source: ABdhPJxvYwNleTXWY/S3WavDz5/k2r0sp2h9zjamdvz+WUc8Vx3B5vSrofONxe4Fcqlg5PcbCQYGaQ== X-Received: by 2002:a7b:c3ce:: with SMTP id t14mr4768131wmj.170.1606321543202; Wed, 25 Nov 2020 08:25:43 -0800 (PST) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id a21sm4855187wmb.38.2020.11.25.08.25.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Nov 2020 08:25:42 -0800 (PST) From: Daniel Vetter To: DRI Development Cc: Intel Graphics Development , linux-mm@kvack.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, LKML , Daniel Vetter , Peter Zijlstra , Dave Chinner , Qian Cai , =?utf-8?q?Thomas_Hellstr=C3=B6m?= , Andrew Morton , Jason Gunthorpe , linux-rdma@vger.kernel.org, Maarten Lankhorst , =?utf-8?q?Christian_?= =?utf-8?q?K=C3=B6nig?= , "Matthew Wilcox (Oracle)" , Daniel Vetter , Ingo Molnar , Will Deacon Subject: [PATCH v4 3/3] locking/selftests: Add testcases for fs_reclaim Date: Wed, 25 Nov 2020 17:25:31 +0100 Message-Id: <20201125162532.1299794-4-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201125162532.1299794-1-daniel.vetter@ffwll.ch> References: <20201125162532.1299794-1-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Since I butchered this I figured better to make sure we have testcases for this now. Since we only have a locking context for __GFP_FS that's the only thing we're testing right now. Acked-by: Peter Zijlstra (Intel) Cc: linux-fsdevel@vger.kernel.org Cc: Dave Chinner Cc: Qian Cai Cc: linux-xfs@vger.kernel.org Cc: Thomas Hellström (Intel) Cc: Andrew Morton Cc: Jason Gunthorpe Cc: linux-mm@kvack.org Cc: linux-rdma@vger.kernel.org Cc: Maarten Lankhorst Cc: Christian König Cc: "Matthew Wilcox (Oracle)" Signed-off-by: Daniel Vetter Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Will Deacon Cc: linux-kernel@vger.kernel.org --- lib/locking-selftest.c | 47 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c index a899b3f0e2e5..ad47c3358e30 100644 --- a/lib/locking-selftest.c +++ b/lib/locking-selftest.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -2357,6 +2358,50 @@ static void queued_read_lock_tests(void) pr_cont("\n"); } +static void fs_reclaim_correct_nesting(void) +{ + fs_reclaim_acquire(GFP_KERNEL); + might_alloc(GFP_NOFS); + fs_reclaim_release(GFP_KERNEL); +} + +static void fs_reclaim_wrong_nesting(void) +{ + fs_reclaim_acquire(GFP_KERNEL); + might_alloc(GFP_KERNEL); + fs_reclaim_release(GFP_KERNEL); +} + +static void fs_reclaim_protected_nesting(void) +{ + unsigned int flags; + + fs_reclaim_acquire(GFP_KERNEL); + flags = memalloc_nofs_save(); + might_alloc(GFP_KERNEL); + memalloc_nofs_restore(flags); + fs_reclaim_release(GFP_KERNEL); +} + +static void fs_reclaim_tests(void) +{ + printk(" --------------------\n"); + printk(" | fs_reclaim tests |\n"); + printk(" --------------------\n"); + + print_testname("correct nesting"); + dotest(fs_reclaim_correct_nesting, SUCCESS, 0); + pr_cont("\n"); + + print_testname("wrong nesting"); + dotest(fs_reclaim_wrong_nesting, FAILURE, 0); + pr_cont("\n"); + + print_testname("protected nesting"); + dotest(fs_reclaim_protected_nesting, SUCCESS, 0); + pr_cont("\n"); +} + void locking_selftest(void) { /* @@ -2478,6 +2523,8 @@ void locking_selftest(void) if (IS_ENABLED(CONFIG_QUEUED_RWLOCKS)) queued_read_lock_tests(); + fs_reclaim_tests(); + if (unexpected_testcase_failures) { printk("-----------------------------------------------------------------\n"); debug_locks = 0;