Re: [regression] Crash in wb_clear_pending()

[Ingo Molnar <mingo@elte.hu>]

* Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Mon, Jul 5, 2010 at 2:19 PM, Bill Davidsen <davidsen@tmr.com> wrote:
> >
> > Absent a small fix, and given that the big fix has a lot more testing than
> > any new patch might, in this case the quickie might be undesirable.
> > Particularly since posters here seem sure that code will be replaced in the
> > next version anyway, and lightly tested patch to obsolete code is actually
> > less conservative.
> 
> I have to agree. Especially as the "big patch" just removes the fragile code 
> that caused the problem in the first place. So in this case I do suspect 
> that the bigger patch ends up being the safer one.

Yeah, i agree - especially since the smaller patch is still pretty large (not 
a oneliner), plus it does not appear that the precise failure mode is fully 
understood either.

> But I obviously don't actually see the problem, so it would be good to get 
> confirmation that Christoph's patch actually fixes things first. Ingo, does 
> the one in this thread apply for you?

Yes, the three larger patches survived overnight testing with 300+ iterations 
and i did some other tests as well, which passed too. These are the patches i 
applied:

 a73dd720  writeback: remove writeback_inodes_wbc
 9f98c0fa  writeback: split writeback_inodes_wb
 79338d2a  writeback: simplify the write back thread queue

Thanks,

	Ingo