• Ari Entlich's avatar
    tty: Add a new VT mode which is like VT_PROCESS but doesn't require a VT_RELDISP ioctl call · eec9fe7d
    Ari Entlich authored
    This new VT mode (VT_PROCESS_AUTO) does everything that VT_PROCESS does
    except that it doesn't wait for a VT_RELDISP ioctl before switching
    away from a VT with that mode.
    If the X server eventually uses this new mode, debugging and crash
    recovery should become easier. This is because even when currently in
    the VT of a frozen X server it would still be possible to switch out
    by doing SysRq-r and then CTRL-<number of a text vt>, sshing in and
    doing chvt <number of a text vt>, or any other method of VT switching.
    The general concensus on #xorg-devel seems to be that it should be
    safe to use this with X now that we have KMS.
    This also moves the VT_ACKACQ define to a more appropriate place,
    for clarity's sake.
    Signed-off-by: default avatarAri Entlich <atrigent@ccs.neu.edu>
    Acked-by: default avatarAlan Cox <alan@linux.intel.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
vt_ioctl.c 40.2 KB