On Wed, Apr 01, 2009 at 06:34:07PM +0200, Ingo Molnar wrote: > > * Jeff Mahoney <jeffm@xxxxxxxx> wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > 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 :) 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 -- To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
