From patchwork Sat Oct 28 00:38:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suren Baghdasaryan X-Patchwork-Id: 739146 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE27EC27C47 for ; Sat, 28 Oct 2023 00:38:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235171AbjJ1Aip (ORCPT ); Fri, 27 Oct 2023 20:38:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346749AbjJ1Aie (ORCPT ); Fri, 27 Oct 2023 20:38:34 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 20FEE1B9 for ; Fri, 27 Oct 2023 17:38:30 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5af592fed43so16542727b3.2 for ; Fri, 27 Oct 2023 17:38:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698453509; x=1699058309; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=BD9lPzNt8hnQJcZ/hWgSWD/y67yszl3sQZlzVb4etk8=; b=wRnrNLhowwwCtiquCs34cdBqrU1JXb5Ss+N2lIWxytefgi1RqBRzji+yXiCNmuI6a2 jC2tjMfyEAVDInZJ0z0offntxZQWshtRnBLUP0WEfWYzyU+Vyu3Qv+ti8qe7KJiHjq2k xrWllxJVKdSZFtgbjOZVMnOzaUBGihOSiVSko2XHXipn1Fgqm/7MujSztMZvQW49CloW nbWtbW+YF1p97INXPGE3MOTKqmpTUXePC+s1NqWDXwB6HU7DYrZ2n7/qAaLDAsm+FmSv sTuKZq+cviYleiA5Gz9RQ7qdALxXER1w2BnldWayez+CiYdXc14Odd0dGwAYxekX4xv7 c2Tw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698453509; x=1699058309; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=BD9lPzNt8hnQJcZ/hWgSWD/y67yszl3sQZlzVb4etk8=; b=jEwoySy9s1BQFid8O9k2sYTAbc9wPWCRcNYz8/enytcLiqmQMW34AalzKaa9WiRuwl FLuwvOjuQi0bmVDq+15KspHQppZIGV9Orh2KxZ4YEW2+5ije4o7SzrGmxIQwHARorlQn uK3jOwLWu/kE7rBcclspdD9luygQpveMv+3xsSTwsPl3ejtePhWflpGHsIJF0CKQrTaV Ts0HuCcxLVN7K/Kfg/GIqm2ywHfDjpDm3rDmo4OhXcdFAipK4NFUGWVixMsnyPwLwyXl YIU3THlCJ9fpDpxUz+SVM7dw5EeSG5+tROEmShmoo9xh7KQf8xRAwaWPlMT1ilSQ9A3p anhg== X-Gm-Message-State: AOJu0YyaVSo37EOLqXrJyV8NTHFe64K8L1Ga8hQxeEPnO+mE9xPmvK/f zoFUA86RoLAur37lLImz0cRrxO8HKj4= X-Google-Smtp-Source: AGHT+IGmeKeXQi4pWbtj4gTgBBjJn+MEaX3ROLUS7uMooi9MoHIQXOo8pDwybtu05kFAWMGKkvzAZguj9E0= X-Received: from surenb-desktop.mtv.corp.google.com ([2620:15c:211:201:cba3:7e7f:79e4:fa57]) (user=surenb job=sendgmr) by 2002:a0d:db97:0:b0:5a7:b15a:1a7d with SMTP id d145-20020a0ddb97000000b005a7b15a1a7dmr86233ywe.2.1698453509335; Fri, 27 Oct 2023 17:38:29 -0700 (PDT) Date: Fri, 27 Oct 2023 17:38:13 -0700 In-Reply-To: <20231028003819.652322-1-surenb@google.com> Mime-Version: 1.0 References: <20231028003819.652322-1-surenb@google.com> X-Mailer: git-send-email 2.42.0.820.g83a721a137-goog Message-ID: <20231028003819.652322-4-surenb@google.com> Subject: [PATCH v4 3/5] selftests/mm: call uffd_test_ctx_clear at the end of the test From: Suren Baghdasaryan To: akpm@linux-foundation.org Cc: viro@zeniv.linux.org.uk, brauner@kernel.org, shuah@kernel.org, aarcange@redhat.com, lokeshgidra@google.com, peterx@redhat.com, david@redhat.com, hughd@google.com, mhocko@suse.com, axelrasmussen@google.com, rppt@kernel.org, willy@infradead.org, Liam.Howlett@oracle.com, jannh@google.com, zhangpeng362@huawei.com, bgeffon@google.com, kaleshsingh@google.com, ngeoffray@google.com, jdduke@google.com, surenb@google.com, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, kernel-team@android.com Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org uffd_test_ctx_clear() is being called from uffd_test_ctx_init() to unmap areas used in the previous test run. This approach is problematic because while unmapping areas uffd_test_ctx_clear() uses page_size and nr_pages which might differ from one test run to another. Fix this by calling uffd_test_ctx_clear() after each test is done. Signed-off-by: Suren Baghdasaryan Reviewed-by: Axel Rasmussen --- tools/testing/selftests/mm/uffd-common.c | 4 +--- tools/testing/selftests/mm/uffd-common.h | 1 + tools/testing/selftests/mm/uffd-stress.c | 5 ++++- tools/testing/selftests/mm/uffd-unit-tests.c | 1 + 4 files changed, 7 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/mm/uffd-common.c b/tools/testing/selftests/mm/uffd-common.c index 02b89860e193..583e5a4cc0fd 100644 --- a/tools/testing/selftests/mm/uffd-common.c +++ b/tools/testing/selftests/mm/uffd-common.c @@ -262,7 +262,7 @@ static inline void munmap_area(void **area) *area = NULL; } -static void uffd_test_ctx_clear(void) +void uffd_test_ctx_clear(void) { size_t i; @@ -298,8 +298,6 @@ int uffd_test_ctx_init(uint64_t features, const char **errmsg) unsigned long nr, cpu; int ret; - uffd_test_ctx_clear(); - ret = uffd_test_ops->allocate_area((void **)&area_src, true); ret |= uffd_test_ops->allocate_area((void **)&area_dst, false); if (ret) { diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h index 7c4fa964c3b0..870776b5a323 100644 --- a/tools/testing/selftests/mm/uffd-common.h +++ b/tools/testing/selftests/mm/uffd-common.h @@ -105,6 +105,7 @@ extern uffd_test_ops_t *uffd_test_ops; void uffd_stats_report(struct uffd_args *args, int n_cpus); int uffd_test_ctx_init(uint64_t features, const char **errmsg); +void uffd_test_ctx_clear(void); int userfaultfd_open(uint64_t *features); int uffd_read_msg(int ufd, struct uffd_msg *msg); void wp_range(int ufd, __u64 start, __u64 len, bool wp); diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c index 469e0476af26..7e83829bbb33 100644 --- a/tools/testing/selftests/mm/uffd-stress.c +++ b/tools/testing/selftests/mm/uffd-stress.c @@ -323,8 +323,10 @@ static int userfaultfd_stress(void) uffd_stats_reset(args, nr_cpus); /* bounce pass */ - if (stress(args)) + if (stress(args)) { + uffd_test_ctx_clear(); return 1; + } /* Clear all the write protections if there is any */ if (test_uffdio_wp) @@ -354,6 +356,7 @@ static int userfaultfd_stress(void) uffd_stats_report(args, nr_cpus); } + uffd_test_ctx_clear(); return 0; } diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c index 2709a34a39c5..e7d43c198041 100644 --- a/tools/testing/selftests/mm/uffd-unit-tests.c +++ b/tools/testing/selftests/mm/uffd-unit-tests.c @@ -1319,6 +1319,7 @@ int main(int argc, char *argv[]) continue; } test->uffd_fn(&args); + uffd_test_ctx_clear(); } }