Re: current & V5 crashes with non-raw sata reads

[Sarton O'Brien <bsd-xen%roguewrt.org@localhost>]

On 8/06/2009 6:21 AM, Thor Lancelot Simon wrote:
> On Mon, Jun 08, 2009 at 12:48:03AM +1000, Thilo Jeremias wrote:
> > Hi all,
> > is this worth a PR?
> > (or where could I start searching for the problem?)
> >
> > I get: a crash if I try to read bigger blocks (~1m or bigger) from a
> > sata drive on an asus m4a78-vm mobo.
>
> No, you get: a crash if you try to read 1M at a time _through the
> metadata cache_, which is a basically silly thing to do.  This should
> not crash the system, but the fix you'll probably see soonest will be
> the removal of the block device nodes entirely -- they're not really
> useful for anything and just cause confusion.
>
> Even if what you are trying to do didn't crash the system (which it
> obviously shouldn't) it would be a very bad idea.  Why are you not
> using the raw device?

He said he did. This was just the one scenario that produced a panic.

Well that's how I read it. I thought I'd answer as I wouldn't be 
surprised if he doesn't.

For anyone else, just send-pr, you'll only get a response if they 
actually need more information.

Sarton