Messages in this thread | | | Date | Wed, 1 Apr 2009 18:51:36 +0200 | From | Frederic Weisbecker <> | Subject | Re: [patch 00/35] Jeff's ReiserFS Patch Queue |
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On Wed, Apr 01, 2009 at 06:34:07PM +0200, Ingo Molnar wrote: > > * Jeff Mahoney <jeffm@suse.com> wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > Ingo Molnar wrote: > > > * Linus Torvalds <torvalds@linux-foundation.org> 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 :)
Hehe :-) No actually I would accept a tiny slowdown but I fear that the common reiserfs users wouldn't.
I'm still working on this and once it's ready enough for an RFC patch, I'll explain how is done the conversion to a mutex.
Stay tuned.
> Ingo
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