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[2003:cb:c70b:4e00:3efc:1c60:bc60:f557]) by smtp.gmail.com with ESMTPSA id a15-20020adffacf000000b002366e3f1497sm1702551wrs.6.2022.10.25.00.07.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Oct 2022 00:07:51 -0700 (PDT) Message-ID: <51302b9e-dc69-d709-3214-f23868028555@redhat.com> Date: Tue, 25 Oct 2022 09:07:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.1 Subject: Re: [PATCH v1 1/7] selftests/vm: anon_cow: test COW handling of anonymous memory To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, Andrew Morton , Shuah Khan , Jason Gunthorpe , John Hubbard , Nadav Amit , Peter Xu , Andrea Arcangeli , Vlastimil Babka , Mike Rapoport , Christoph von Recklinghausen , Don Dutile References: <20220927110120.106906-1-david@redhat.com> <20220927110120.106906-2-david@redhat.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20220927110120.106906-2-david@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1666681675; a=rsa-sha256; cv=none; b=goomFqiIeqfXYGu+PwPfvpA0vY8FJJ5MG5eqQVMzt1JPmxBUyj3ES1+oRWj0HdEmnVV/TY +bPjA5zMfv2lUmbLJGxmthoBAfWg+42u3ff260t1u7kMd7G+aTv97vkUeVPahJ2ewTCZeH vLWdpJ/nNJd5crODWRz+rz33k7QPK0I= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=KAq4Lnfl; dmarc=pass (policy=none) header.from=redhat.com; spf=pass (imf27.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1666681675; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=e274vUxvlMRl4b9EVFADkQ7OakHDt5CbdSA7wcE3hgk=; b=UWTPvmaK1KMFSwb1mG5pyCrSRKvFMKgvWr2tf15W3iGNETBHbufBm6hkr8E57skZQKDXjG TZb4Ls2VAaNuYhHdbKQTZp0KUoC4cCpjEgAJDNOf5uNu+KEZITOULRaKm4kxWg1M2t7xl6 jAegGo1R0buu5JkvsDeIuilx3kDDZeo= X-Rspamd-Queue-Id: 2861740012 Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=KAq4Lnfl; dmarc=pass (policy=none) header.from=redhat.com; spf=pass (imf27.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com X-Rspamd-Server: rspam12 X-Rspam-User: X-Stat-Signature: k7oc1ez8n4hizzcy9zmkec17dhtcxquf X-HE-Tag: 1666681674-646010 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 27.09.22 13:01, David Hildenbrand wrote: > Let's start adding tests for our COW handling of anonymous memory. We'll > focus on basic tests that we can achieve without additional libraries or > gup_test extensions. > > We'll add THP and hugetlb tests separately. > > Signed-off-by: David Hildenbrand > --- The following fixup on top: diff --git a/tools/testing/selftests/vm/anon_cow.c b/tools/testing/selftests/vm/anon_cow.c index 9d2b15c829e6..4613294af758 100644 --- a/tools/testing/selftests/vm/anon_cow.c +++ b/tools/testing/selftests/vm/anon_cow.c @@ -76,7 +76,7 @@ static int child_vmsplice_memcmp_fn(char *mem, size_t size, .iov_base = mem, .iov_len = size, }; - size_t cur, total, transferred; + ssize_t cur, total, transferred; char *old, *new; int fds[2]; char buf; @@ -172,7 +172,7 @@ static void do_test_vmsplice_in_parent(char *mem, size_t size, .iov_base = mem, .iov_len = size, }; - size_t cur, total, transferred; + ssize_t cur, total, transferred; struct comm_pipes comm_pipes; char *old, *new; int ret, fds[2]; -- Thanks, David / dhildenb