Re: [patch] Real-Time Preemption, -RT-2.6.11-rc3-V0.7.38-01

From: Ingo Molnar
Date: Tue Mar 15 2005 - 07:02:18 EST

* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> I've realized that my previous patch had too many problems with the
> way the journaling system works. So I went back to my first approach
> but added the journal_head lock as one global lock to keep the buffer
> head size smaller. I only added the state lock to the buffer head.
> I've tested this for some time now, and it works well (for the test at
> least). I'll recompile it with PREEMPT_DESKTOP to see if that works
> too.

good progress - but the global lock may be a scalability worry on
upstream though. Would it be possible to just mirror much of the current
lock logic, but with spinlocks instead of bitlocks? And there should be
no #ifdefs on PREEMPT_RT.

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