Re: Horrible regression with -CURRENT from "Don't busy-lock-loop in preemptable spinlocks" patch

From: Ingo Molnar <>
Date: 2005-01-19 20:20:13
* Peter Chubb <> wrote:

> >> Here's a patch that adds the missing read_is_locked() and
> >> write_is_locked() macros for IA64.  When combined with Ingo's
> >> patch, I can boot an SMP kernel with CONFIG_PREEMPT on.
> >> 
> >> However, I feel these macros are misnamed: read_is_locked() returns
> >> true if the lock is held for writing; write_is_locked() returns
> >> true if the lock is held for reading or writing.
> Ingo> well, 'read_is_locked()' means: "will a read_lock() succeed"
> Fail, surely?

yeah ... and with that i proved beyond doubt that the naming is indeed
unintuitive :-)

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Received on Wed Jan 19 04:36:58 2005

This archive was generated by hypermail 2.1.8 : 2005-08-02 09:20:34 EST