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/linux-4.1.27/Documentation/filesystems/
Ddevpts.txt10 - '-o newinstance' mount option is specified while mounting devpts
16 (-o newinstance and -o ptmxmode) will be ignored with a 'bogus option' message
20 'newinstance' option (as in current start-up scripts) the new mount binds
29 If CONFIG_DEVPTS_MULTIPLE_INSTANCES=y and 'newinstance' option is specified,
47 $ mount -t devpts -o newinstance lxcpts /dev/pts
57 In multi-instance mode (i.e '-o newinstance' mount option is specified at least
60 1. If -o newinstance mount option is never used, /dev/pts/ptmx can be ignored
63 2. To effectively use multi-instance mode (i.e -o newinstance is specified)
67 $ mount -t devpts -o newinstance devpts /dev/pts
95 mount -t devpts -o newinstance -o ptmxmode=0666 devpts /dev/pts
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/linux-4.1.27/fs/devpts/
Dinode.c107 int newinstance; member
176 opts->newinstance = 0; in parse_mount_options()
220 opts->newinstance = 1; in parse_mount_options()
458 if ((current_user_ns() != &init_user_ns) && !opts.newinstance) in devpts_mount()
461 if (opts.newinstance) in devpts_mount()
538 (fsi->mount_opts.newinstance ? pty_reserve : 0)) { in devpts_new_index()
/linux-4.1.27/drivers/tty/
DKconfig131 filesystem with the '-o newinstance' option will create an