From patchwork Thu Sep 26 15:20:44 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 830922 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 723564D8C8 for ; Thu, 26 Sep 2024 15:21:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727364062; cv=none; b=Mm131VpPZqRAnPznvwTBkMUJOnbN2wvzhNYKOIzLZXBJDbiVx1cKudDwyxJ+FnzmBAUqjVFG/nk7OP39wuq9Q7tPhcSfPwo+5vtAk3vsHQZC+Xz5fZ9l/b6YIeJFF5mxV4HD0IdfU64hLz1hgQjQSVMukbe/GSAA+u9nfXftYeU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727364062; c=relaxed/simple; bh=XBqWDfNJG/2q9rjmUvR7KopetYbDazuFgLdnXBBgHJs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pq7b75WevfQwt7CJwt4VYT7HuC/nM3cIaWa5X60krPOxXp4PkKIJOGZ8PLsbPSm+S54OWER6WMx2jaG7QMzIMJRB5zvil8Q1Eu+QLVKURLkhMj6vm0y+UOs+YiTjvbAUVvIcnTRx64AmEMXGhm8DiYo6yZrYFRecx8vBSVFpBRo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=GTcd6+ND; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="GTcd6+ND" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1727364060; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SnbjnYmt3l0aTxSupRXPM1juyT6aAAemxQXR6PSRwdY=; b=GTcd6+NDNpTk93ZC6y8gj8odeAv/IjDmKayVQAVlzwE0A+2ACBEMiihhmtr4YZELcbPR5i tvATEwm/QtMjgKHPUNw1kFq+IMi1I9o1aYayjDkJdmtpFRyFpfDDJoEMVh5/ihXjuefJc6 ux+CATSteh3zBd7Ht68IloyolyqIXv4= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-64-ZKadytkVMWCA608fWmDaRg-1; Thu, 26 Sep 2024 11:20:57 -0400 X-MC-Unique: ZKadytkVMWCA608fWmDaRg-1 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (unknown [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 229791936CF3; Thu, 26 Sep 2024 15:20:56 +0000 (UTC) Received: from t14s.fritz.box (unknown [10.22.16.71]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id A157C1944D16; Thu, 26 Sep 2024 15:20:53 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, David Hildenbrand , Andrew Morton , Shuah Khan , Mario Casquero , Breno Leitao Subject: [PATCH v1 2/2] selftests/mm: hugetlb_fault_after_madv: improve test output Date: Thu, 26 Sep 2024 17:20:44 +0200 Message-ID: <20240926152044.2205129-3-david@redhat.com> In-Reply-To: <20240926152044.2205129-1-david@redhat.com> References: <20240926152044.2205129-1-david@redhat.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Let's improve the test output. For example, print the proper test result. Install a SIGBUS handler to catch any SIGBUS instead of crashing the test on failure. With unsuitable hugetlb page count: $ ./hugetlb_fault_after_madv TAP version 13 1..1 # [INFO] detected default hugetlb page size: 2048 KiB ok 2 # SKIP This test needs one and only one page to execute. Got 0 # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:1 error:0 On a failure: $ ./hugetlb_fault_after_madv TAP version 13 1..1 not ok 1 SIGBUS behavior Bail out! 1 out of 1 tests failed On success: $ ./hugetlb_fault_after_madv TAP version 13 1..1 # [INFO] detected default hugetlb page size: 2048 KiB ok 1 SIGBUS behavior # Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: David Hildenbrand Reviewed-by: Breno Leitao --- .../selftests/mm/hugetlb_fault_after_madv.c | 34 ++++++++++++++++++- 1 file changed, 33 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/hugetlb_fault_after_madv.c b/tools/testing/selftests/mm/hugetlb_fault_after_madv.c index ff3ba675278d..e2640529dbb2 100644 --- a/tools/testing/selftests/mm/hugetlb_fault_after_madv.c +++ b/tools/testing/selftests/mm/hugetlb_fault_after_madv.c @@ -5,6 +5,8 @@ #include #include #include +#include +#include #include "vm_util.h" #include "../kselftest.h" @@ -14,11 +16,25 @@ static char *huge_ptr; static size_t huge_page_size; +static sigjmp_buf sigbuf; +static bool sigbus_triggered; + +static void signal_handler(int signal) +{ + if (signal == SIGBUS) { + sigbus_triggered = true; + siglongjmp(sigbuf, 1); + } +} + /* Touch the memory while it is being madvised() */ void *touch(void *unused) { char *ptr = (char *)huge_ptr; + if (sigsetjmp(sigbuf, 1)) + return NULL; + for (int i = 0; i < INLOOP_ITER; i++) ptr[0] = '.'; @@ -44,13 +60,23 @@ int main(void) * interactions */ int max = 10000; + int err; + + ksft_print_header(); + ksft_set_plan(1); srand(getpid()); + if (signal(SIGBUS, signal_handler) == SIG_ERR) + ksft_exit_skip("Could not register signal handler."); + huge_page_size = default_huge_page_size(); if (!huge_page_size) ksft_exit_skip("Could not detect default hugetlb page size."); + ksft_print_msg("[INFO] detected default hugetlb page size: %zu KiB\n", + huge_page_size / 1024); + free_hugepages = get_free_hugepages(); if (free_hugepages != 1) { ksft_exit_skip("This test needs one and only one page to execute. Got %lu\n", @@ -73,5 +99,11 @@ int main(void) munmap(huge_ptr, huge_page_size); } - return KSFT_PASS; + ksft_test_result(!sigbus_triggered, "SIGBUS behavior\n"); + + err = ksft_get_fail_cnt(); + if (err) + ksft_exit_fail_msg("%d out of %d tests failed\n", + err, ksft_test_num()); + ksft_exit_pass(); }