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: 11919923 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 0EFB9C64E69 for ; Fri, 20 Nov 2020 09:56:28 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9F6EC2242B for ; Fri, 20 Nov 2020 09:56:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=ffwll.ch header.i=@ffwll.ch header.b="abxl7E4w" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9F6EC2242B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ffwll.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CCC9B6E8A1; Fri, 20 Nov 2020 09:56:20 +0000 (UTC) Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) by gabe.freedesktop.org (Postfix) with ESMTPS id 034C96E89C for ; Fri, 20 Nov 2020 09:56:16 +0000 (UTC) Received: by mail-wr1-x444.google.com with SMTP id b6so9410708wrt.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=lZjnc84S+6KxhaxKrbiXzScuHCFdHdmTY0iGD4+hNOw0wFCdVTJJ5HFDrU3h+ADhiR WYZcQ4fMLYhFvAHZqzDqMB1oS4OaYjn4J2iKvnn0YHh0t24eSN3+I7VEMlWT71dtIVYY DIolnFtMa90OYJVSXtTuZoINTkS+9OYgLY7a3RHaB6Wyx05ocyrAhve/Blrcq07vatig pGc8dRGuWFyXg7Yx1Shx33ThxuoxSHL4rXDQXcTi2Pd4dCsffJ/gugNSSNn8c8dXGBvF cYgBEfZyxKYag/MYdihVcXBaDADmiYJmIABxKStaCwM/0smYe7kEYgyyneVSZmmuhoVB gZYw== X-Gm-Message-State: AOAM532cN7zvB5CWRQR2r/Q8cTHAzDk5xKM7WVmX+l+5mRdRdDnpolHt vAJ5snhntWe19l29LthTKzMncXEDitJxmA== 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 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 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Will Deacon , linux-rdma@vger.kernel.org, Daniel Vetter , Intel Graphics Development , Dave Chinner , LKML , "Matthew Wilcox \(Oracle\)" , =?utf-8?q?Christian_K?= =?utf-8?q?=C3=B6nig?= , linux-xfs@vger.kernel.org, linux-mm@kvack.org, Peter Zijlstra , Jason Gunthorpe , Qian Cai , linux-fsdevel@vger.kernel.org, Daniel Vetter , Andrew Morton , Ingo Molnar , =?utf-8?q?Thomas_Hellstr=C3=B6m?= Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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;