> This statement of mine was grade-A bollocks. printk cannot of
> course call down(). It needs to use __down_trylock and buffer
> it up if it fails. (faster, too!)
Okay. I'm going to start working on this tomorrow.
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Andrew Morton writes:
> The subtler problem will be interrupt-capable drivers which
> do a bare spin_lock() to serialise wrt their interrupt routines,
> relying upon interrupts being disabled. They'll be deadlocky
> and will need changing. That's trivial to find and fix though.
Uhh, what if you
James Simmons wrote:
> ...
> By you saying couldn't be acquired from interrupt context do you mean
> from a process context or do you mean it failed to aquire it while in
> the interrupt context?
Actually, printk() must always use __down_trylock().
> > - Get rid of console_tasklet. Do it in pr
> heh.
>
> I'm actually planning on grabbing console_lock and thoroughly strangling
> it
Ha Ha!!
> - Use a semaphore for serialisation.
I think this would be the best solution as well.
> - For printk in interrupt context, grab the
> semaphore (yes, you can do this).
Don't forget about the
Hi,
On Thu, 18 Jan 2001, Andrew Morton wrote:
> - Get rid of the special printk buffer - share the
> log buffer. (Implies writes to console
> devices will be broken into two writes when they
> wrap around).
> - Teach vsprintf to print into a circular buffer
> (snprintf thus comes for fr
On 18 Jan 01 at 0:49, Andrew Morton wrote:
> Assumption:
> - Once the system is up and running, it's always safe to
> call down() when in_interrupt() returns false - probably
> not the case in parts of the exit path - tough.
>
> Anyway, that's the thoughtware. Sound sane?
Do not forget to
James Simmons wrote:
>
> Some time ago a intel i810 framebuffer driver was written. It only worked
> for 2.2.X. With 2.4.X a spinlock is used in the upper layers of the
> console system. Sooner or later we are going to run into the situtation
> where we will have graphics hardware which has no v
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