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Mon, 30 Mar 2026 04:57:38 -0700 (PDT) Received: from redhat.com ([209.132.188.88]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b242765b9fsm94275665ad.43.2026.03.30.04.57.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Mar 2026 04:57:38 -0700 (PDT) Date: Mon, 30 Mar 2026 19:57:35 +0800 From: Li Wang To: "David Hildenbrand (Arm)" Cc: akpm@linux-foundation.org, rppt@kernel.org, ljs@kernel.org, Liam.Howlett@oracle.com, vbabka@kernel.org, surenb@google.com, mhocko@suse.com, shuah@kernel.org, aubaker@redhat.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH v3] selftests/mm: skip hugetlb_dio tests when DIO alignment is incompatible Message-ID: References: <20260330053915.75442-1-liwang@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Mar 30, 2026 at 07:35:50PM +0800, Li Wang wrote: > > > int main(void) > > > { > > > ... > > > fd = open("/tmp", O_TMPFILE | O_RDWR | O_DIRECT, 0664); > > > if (fd < 0) > > > ksft_exit_skip("Unable to allocate file: %s\n", strerror(errno)); > > > > > > if (get_dio_alignment(fd) < 0) > > > > I would suggest that you query the alignment only once, and forward it > > to the test. Oh, I suddenly realized that you meant to store it in a local and forward it through to check_dio_alignment() and run_test() as an explicit argument. Sure, I'm ok with that minor change: int main(void) { ... alignment = get_dio_alignment(fd); if (alignment < 0) ksft_exit_skip(...); run_test(fd, start_off, end_off, alignment); } -- Regards, Li Wang