From patchwork Fri Nov 20 09:54:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 11919971 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 E7DDEC64EBC for ; Fri, 20 Nov 2020 09:56:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9044F2240C for ; Fri, 20 Nov 2020 09:56:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ffwll.ch header.i=@ffwll.ch header.b="abxl7E4w" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727767AbgKTJ4d (ORCPT ); Fri, 20 Nov 2020 04:56:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46078 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727182AbgKTJ4Q (ORCPT ); Fri, 20 Nov 2020 04:56:16 -0500 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A7D2BC061A04 for ; Fri, 20 Nov 2020 01:56:15 -0800 (PST) Received: by mail-wr1-x443.google.com with SMTP id b6so9410693wrt.4 for ; Fri, 20 Nov 2020 01:56:15 -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=ODWIjSITGhibxiu5sdcf8aVMrj4QUXzG8FJI3RynFGM=; b=abxl7E4wo7jZpAfTzuunphaH5vlt/naI7HAiWaSpvixjFnf4sVbia8Q3BJ+dVpIqSd rzyCZR6pVpoX67iLtk7QN881pKiYydMCbW2tIIk5Y0QHWn5wBSS/BB//JgXsoKgg8fVg rRtlAoYdJtnHk5e8fU/kzRg05Ih+mmmH1kzj4= 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=ODWIjSITGhibxiu5sdcf8aVMrj4QUXzG8FJI3RynFGM=; b=nwcAHWT2zHH51Z/WFOS/m4NZ0wJpFqPSO51BSKSjeA9+JNnunCvxxvdnI18ttCaDEm X29hOFhTHRtIcb6dACSjUmbfq7GcRgA3YXKSsJNGbwjyYGTTMnGo+kKHX4XHAaCUZbJi SjlbeSPrR9ILu/FGMJz5t1ZA2JhI1Qc/+21sE40PkSVMLgtFr9Ocy5K9ldLhmuGvTuOn mae/oVFnZ7MQXBsSb3Fin+aWM12DMzR0NC8Dc8IZJmeBtq0OeJxdfAN89oDhfu/J3M6N DpZFEiYa7nBPuF98hFiozcQ++Q4gZkwZONlOaBL/nsXykmcKcElnYGVHj+gIcb78WgfG C+lg== X-Gm-Message-State: AOAM531aVjQT+Bu5oHHMeFUPAVAoeX1hx1ztmbE9EiFKu/ZAf2oJOd43 qqaq/IKs3o/Jh03KIwtpHHBJTQ== X-Google-Smtp-Source: ABdhPJxJ2UyLnfvFIWnVmPKRqax6sfQkCZohfTD1sEUpZkqrYbW1bkqO7INNhAf+GB4nJI4JFKC4Ow== X-Received: by 2002:a5d:4d87:: with SMTP id b7mr15742781wru.115.1605866174422; Fri, 20 Nov 2020 01:56:14 -0800 (PST) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id t9sm4500208wrr.49.2020.11.20.01.56.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Nov 2020 01:56:13 -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 , Dave Chinner , Qian Cai , =?utf-8?q?Thomas?= =?utf-8?q?_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 , Peter Zijlstra , Ingo Molnar , Will Deacon Subject: [PATCH 3/3] locking/selftests: Add testcases for fs_reclaim Date: Fri, 20 Nov 2020 10:54:44 +0100 Message-Id: <20201120095445.1195585-4-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201120095445.1195585-1-daniel.vetter@ffwll.ch> References: <20201120095445.1195585-1-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. 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 Acked-by: Peter Zijlstra (Intel) --- 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;