Re: [9fans] Disk backup?

[erik quanstrom <quanstro@quanstro.net>]

> int
> cwfree(Device *dev, Off addr)
> {
> 	int state;
>
> 	if(dev->type == Devcw) {
> 		state = cwio(dev, addr, 0, Ofree);
> 		if(state != Cdirty)
> 			return 1;	/* do not put in freelist */
> 	}
> 	return 0;			/* put in freelist */
> }
>
> now, such a Cdirty block could just sit in the freelist for a while no?
> while the filesystem does many dump generations. if that Cdirty block
> becomes part of the filesystem again because it is allocated, then
> the next cwrecur() should pick it up and call split() on it.

why wouldn't it be marked for dump on the very
first dump?

- erik