On Wed, 19 Dec 2007 14:18:18 +0100
"Remy Bohmer" <[EMAIL PROTECTED]> wrote:
> Hello Haavard,
>
> > Hrm. We probably need to lock while updating icount. That's a problem
> > since we do that from the tx interrupt handler...and I don't suppose we
> > want to move most of the atmel_tx_chars() code i
Hello Haavard,
> Hrm. We probably need to lock while updating icount. That's a problem
> since we do that from the tx interrupt handler...and I don't suppose we
> want to move most of the atmel_tx_chars() code into the tasklet too...?
I do not see a reason why not moving transmit to a tasklet. It
On Wed, 19 Dec 2007 13:50:16 +0100
"Remy Bohmer" <[EMAIL PROTECTED]> wrote:
> Hello Haavard,
>
> > Hmm...perhaps we can eliminate the locking in the status handler
> > too...? Does anyone see a problem with this patch?
>
> I have not seen any problem so far, besides, I am very happy with a
> l
Hello Haavard,
> Hmm...perhaps we can eliminate the locking in the status handler
> too...? Does anyone see a problem with this patch?
I have not seen any problem so far, besides, I am very happy with a
lockless interrupt handling, because this helps reducing latencies.
Tested it on top of the o
On Tue, 18 Dec 2007 16:23:11 +0100
"Remy Bohmer" <[EMAIL PROTECTED]> wrote:
> Preempt-RT now absolutely requires my (4th) IRQ_NODELAY patch, because
> the spinlock now is always inside the code, and not only in
> theexception path, and thus without my NO_DELAY patch we have a panic
> during boot.
Hello Haavard,
> > BTW: Attached I have added a 2nd patch that I use for Preempt-RT. (For
> > cleaner startup, and to get rid of useless IRQ-threads.
>
> Hrm. That assumption isn't valid on AVR32...on AP7000, for example,
> IRQ1 is used by the LCD controller.
In that case, forget that (dirty) pat
Crud...my mailer helpfully filtered this into the huge linux-kernel
bin instead of leaving it in my inbox...
On Tue, 18 Dec 2007 16:23:11 +0100
"Remy Bohmer" <[EMAIL PROTECTED]> wrote:
> Hello Haavard,
>
> A few remarks:
>
> > From: Remy Bohmer <[EMAIL PROTECTED]>
>
> My name, at your address
Hello Haavard,
A few remarks:
> From: Remy Bohmer <[EMAIL PROTECTED]>
My name, at your address ;-)))
> This patch splits up the interrupt handler of the serial port
> into a interrupt top-half and a tasklet.
I see you moved the handling of the sysrq-key to the tasklet. This was
actually a very
From: Remy Bohmer <[EMAIL PROTECTED]>
This patch splits up the interrupt handler of the serial port
into a interrupt top-half and a tasklet.
The goal is to get the interrupt top-half as short as possible to
minimize latencies on interrupts. But the old code also does some
calls in the interrupt h
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