Re: [PATCH 000 of 4] Introduction

Neil Brown
2006-10-11T09:20:21Z

On Wednesday October 11, mingo@elte.hu wrote:
> >
> > I say "normally" because if a loop were created in the array->member
> > hierarchy a deadlock could happen. However that causes bigger
> > problems than a deadlock and should be fixed independently.
>
> ok to me. Sidenote: shouldnt we algorithmically forbid that "loop"
> scenario from occuring, as that possibility is what causes lockdep to
> complain about the worst-case scenario?

Yes we should. Possibly we could use the linkage information set up
by bd_claim_by_kobject. However I'm afraid that the locking required
to check that linkage safely will look very dead-lock prone to
lockdep. I suspect that can be worked-around though.

NeilBrown