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Tue, 8 Sep 2026 10:47:26 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id cj9YJr7nn2pzKgAAD6G6ig (envelope-from ); Tue, 08 Sep 2026 10:47:26 +0000 Date: Tue, 8 Sep 2026 12:47:35 +0200 From: Cyril Hrubis To: Victor Cheng-Yen Yang Message-ID: References: <20260908023121.1895897-1-cyyang772@andestech.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260908023121.1895897-1-cyyang772@andestech.com> X-Spamd-Result: default: False [-8.30 / 50.00]; REPLY(-4.00)[]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; MIME_TRACE(0.00)[0:+]; MISSING_XM_UA(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; RCVD_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.cz:email] X-Virus-Scanned: clamav-milter 1.0.9 at in-2.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [PATCH] mmap21: Check for free space before mapping the file X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ltp@lists.linux.it Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Hi! > The test creates a sparse file with lseek() and a one byte write, so > mmap() allocates no blocks. The child then touches every byte and ext4 > fills the holes inside ext4_page_mkwrite(). A store instruction has no > error return, so an ENOSPC there becomes VM_FAULT_SIGBUS and the test > reports only > > tst_test.c:536: TBROK: Child (13042) killed by signal SIGBUS > > which says nothing about the full filesystem. The information is > available before the mapping and gone after it, so check it in setup > and report TCONF earlier as convention. Depending on the page size this is either 4MB or 64MB, I would say that if you run LTP on a machine with less than 4MB of free space many tests would fail. Maybe it would make sense to print a warning from the test library for any tests that has needs_tmpdir == 1 and the free space at the test temporary directory is less than a few megabytes. -- Cyril Hrubis chrubis@suse.cz -- Mailing list info: https://lists.linux.it/listinfo/ltp