On Tue, 15 Mar 2005, Ingo Molnar wrote:
> > * Steven Rostedt <[EMAIL PROTECTED]> wrote: > > > > What should we use instead of #ifdef PREEMPT_RT? Or should we just > > keep it the same for both. Since this fix is only to fix spinlocks > > that schedule, I figured that it would be better not to waste the > > memory of those not using PREEMPT_RT. Should I use the opposite > > PREEMPT_DESKTOP? > > i'd go for removing bit-spinlocks altogether, in the upstream kernel. It > would simplify things, besides making PREEMPT_RT simpler as well. The > memory overhead is not a big issue i believe. (8 more bytes per ext3 bh, > on x86) > The problem here is that it's not ext3 bh's only. They're still the normal buffer head. The problem arrises because the ext3 "journal head" is allocated within these bit spin locks. I tried to monkey with putting the locks in the journal heads and have checks to see when to free them, but it wasn't that simple. I started having problems with some of the freeing transactions, I might have assumed too much. I'll give it one more try to get it into the journal heads, but after that, (if I fail) I'll let someone who understands the ext3 system better handle this. -- Steve - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
