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

[Ingo Molnar]

* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> So, the only other solutions that I can think of is:
> 
> a) add yet another (bloat) lock to the buffer head.
> 
> b) Still use your b_update_lock for the jbd_lock_bh_journal_head and 
> change the jbd_lock_bh_state to what I discussed earlier, and that 
> being the hash wait_on_bit code.

could you try a), how clean does it get? Personally i'm much more in 
favor of cleanliness. On the vanilla kernel a spinlock is zero bytes on 
UP [the most RAM-sensitive platform], and it's a word on typical SMP.

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/