Re: [patch 00/35] Jeff's ReiserFS Patch Queue

[Ingo Molnar]

* Jeff Mahoney <jeffm@xxxxxxxx> wrote:

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> Ingo Molnar wrote:
> > * Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> > 
> >>> Once this is applied, I expect reiserfs to be in deep 
> >>> maintenance-only mode.
> >> Heh, I hadn't expected even this.
> > 
> > Note, there are BKL-removal patches in the works by Frédéric 
> > Weisbecker, for the tip:kill-the-BKL topic branch.
> > 
> > Reiser3 is the heaviest (and most non-trivial) BKL user amongst all 
> > the filesystems, its BKL use is recursive and it frequently relies 
> > on the implicit dropping of the BKL at various blocking points both 
> > for correctness and for performance reasons.
> > 
> > There might be something worth posting+reviewing soon.
> 
> Oh interesting. I'm glad someone is working on this. I've started 
> to several times and decided to focus my efforts on things outside 
> of reiserfs instead. The reiserfs usage of the BKL has always been 
> a black mark.

I'll let Frederic describe it but AFAIK the patch is working fine 
with the BKL as a mutex and no lockdep complaints or lockups. The 
main focus is now on finding the performance affecting spots, 
because Frederic's main desktop is on reiserfs and he does not 
accept a slowdown :)

	Ingo
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