Re: Poor floppy performance in kernel 2.4.10

["Peter T. Breuer" <ptb@it.uc3m.es>]

"A month of sundays ago Alain Knaff wrote:"
> Appended to this mail is the "long live the struct block_device"
> patch. It includes the stuff covered in the last patch as well. The
> issue of stopping transfers in progress is not yet addressed.

Errr .. haven't read the patches. But are you doing something so that
the semantics of the action taken after a media check fails can
be overridden? The current invalidate_inodes is too strong for me,
since I am proxying a remote device, and I don't want to kill 
_all_ the local file descriptors when the remote media disappears. 
I need to at least continue to send down local ioctls!

No, no suggestions of an extra control device, please. Simplicity.

> +
>  static struct block_device_operations floppy_fops = {
>  	open:			floppy_open,
>  	release:		floppy_release,
>  	ioctl:			fd_ioctl,
>  	check_media_change:	check_floppy_change,
>  	revalidate:		floppy_revalidate,
> +	can_trust_media_change: floppy_can_trust_media_change
>  };

and I'd like to have "invalidate" as a method too.

Peter