Re: [CFT][PATCH] long-living cache for block devices

[Linus Torvalds]

On Fri, 9 Nov 2001, Alexander Viro wrote:
> >
> > Why do yu care about destroying buffer-heads?
> >
> > You might as well leave them active, I don't see what you win from trying
> > to get rid of them aggressively. They'll go away when the pages go away..
>
> The simplest way to make sure that all IO is over (including readaheads).

Again - why do you actually care?

If we end up removing the module, we'll call "unregister_blockdev()" or
whatever, which in turn gets rid of _all_ pages, and that that time we
will correctly get rid of buffers.

And before you remove the module I see no advantage to have any guarantees
of quiescence and removing the buffer heads. I only see extra code that
doesn't seem to have any real purpose..

		Linus