I can't seem to adjust the elevator parameters for this block device, but
can't:
# elvtune /dev/rd/disc0/disc
ioctl get: Invalid argument
Tried unsucessfully with elvtune from Debian's elvtune package 2.11l-3 and
also 2.11m from kernel.org.
Any hints?
--
Brian Ristuccia
[email protected]
On Tue, 13 Nov 2001, Brian Ristuccia wrote:
> I can't seem to adjust the elevator parameters for this block device, but
> can't:
> # elvtune /dev/rd/disc0/disc
> ioctl get: Invalid argument
DAC960.c doesn't know about BLKELVSET / BLKELVGET, and control is
only passed down to the generic ioctl in the case of BLKBSZSET,
and doesn't have a default: entry in the switch statement of
DAC960_IOCTL()
I've not seen one of these devices, so I'm not sure if this makes
sense or not, but passing on requests to the lower level should
be a simple..
default:
return( blk_ioctl(Inode->i_rdev, Request, Argument));
Addition.
There may be other reasons this driver doesn't provide the
elevator ioctls though.
regards,
Dave.
--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
On Tue, Nov 13 2001, Dave Jones wrote:
> On Tue, 13 Nov 2001, Brian Ristuccia wrote:
>
> > I can't seem to adjust the elevator parameters for this block device, but
> > can't:
> > # elvtune /dev/rd/disc0/disc
> > ioctl get: Invalid argument
>
> DAC960.c doesn't know about BLKELVSET / BLKELVGET, and control is
> only passed down to the generic ioctl in the case of BLKBSZSET,
> and doesn't have a default: entry in the switch statement of
> DAC960_IOCTL()
>
> I've not seen one of these devices, so I'm not sure if this makes
> sense or not, but passing on requests to the lower level should
> be a simple..
>
> default:
> return( blk_ioctl(Inode->i_rdev, Request, Argument));
>
> Addition.
Or just add it to the BLKBSZGET etc string that pass it on to blk_ioctl
anyways.
> There may be other reasons this driver doesn't provide the
> elevator ioctls though.
None, it was simply never added.
--
Jens Axboe