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: 11919951 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=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 9FC5EC63777 for ; Fri, 20 Nov 2020 09:56:26 +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 0E02E222BA for ; Fri, 20 Nov 2020 09:56:25 +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 0E02E222BA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ffwll.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3FF9F6E8A4; Fri, 20 Nov 2020 09:56:18 +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 B35926E89C for ; Fri, 20 Nov 2020 09:56:15 +0000 (UTC) Received: by mail-wr1-x444.google.com with SMTP id 23so9368375wrc.8 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=LVDJJ8vDJcoa1B4gmAyk2Xr8i/v1PpiUa1PO82bgG1d5JovJAcdd48HyH+Aki7t/+Y 1Op2J5iRzjl/wzgL07F1Afqb30NjZr0aF+nH9uY7BbB458sRkm7ROrxnGnd6ZDosU97Z aDOx7RRW7bDBaxOL7MVCNc+JXbtLsMCUH1o/kTe1CsByLcQmyiNZ7G7us5tliLfPkSNW /YpW/TQ6lWm/ilvcOpN/JSFqXnGUnUArsXMpXPzRzvTWtGxwCgrmt2H/ocfS1fyeNdtY CAqrTczOZAwUezOtGAQ0xGkloZ52wqGaOPBMVrUwZZ+YleBhmn3XgLc6lzukJNbqqJP8 /qMw== X-Gm-Message-State: AOAM533jhH9tXB5IZCsT68YDjxI5nuMBSB7ZsyWe9Wm2ixda3udytQz7 hC/3a+bO8i6DBOzbjAR63XtYkA== 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 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 Subject: [Intel-gfx] [PATCH 3/3] locking/selftests: Add testcases for fs_reclaim X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & 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 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" 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;