From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cyril Hrubis Date: Thu, 5 Apr 2018 11:52:14 +0200 Subject: [LTP] [PATCH 1/2] syscalls/preadv01: Run test for all filesystems In-Reply-To: <1522400003-11319-1-git-send-email-yangx.jy@cn.fujitsu.com> References: <1522400003-11319-1-git-send-email-yangx.jy@cn.fujitsu.com> Message-ID: <20180405095214.GB31751@rei.lan> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it Hi! Looking at the test running it for all filesystems would not make much sense as it is since as far as I can tell: 1) setup() creates a file and writes data to it - dirty pagecache record is created 2) test() reads data from the file - kernel will copy the data from pagecache 3) test library cleanup will umount() the device - dirty pagecache is written at this point So we will not reach any filesystem specific code at all. I guess that we may fix that by opening second file descriptor with O_DIRECT which would bypass pagecache so each read/write request would trigger I/O request from the block device. -- Cyril Hrubis chrubis@suse.cz