Re: [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01

["Stephen C. Tweedie" <sct@redhat.com>]

Hi,

On Fri, 2005-08-26 at 05:24, Steven Rostedt wrote:

> Well, I just spent several hours trying to use the b_update_lock in
> implementing something to replace the bit spinlocks for RT.  It's
> getting really ugly and I just hit a stone wall.
> 
> The problem is that I have two locks to work with. A
> jbd_lock_bh_journal_head and a jbd_lock_bh_state.  ...

For now, yes.

> So, the only other solutions that I can think of is:
> 
> a) add yet another (bloat) lock to the buffer head.

This one looks like the right answer for now, just to get the patch
series running.  I've got a WIP patch under development which removes
the bh_journal_head lock entirely; if that works out, you may find
things get a bit easier.

--Stephen

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