linux-kernel - Re: [PATCH 0/2] firewire: ohci: add support for tracepoints events

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Date: Thu, 27 Jun 2024 22:21:35 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: linux1394-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] firewire: ohci: add support for tracepoints events

On Tue, Jun 25, 2024 at 12:18:04PM +0900, Takashi Sakamoto wrote:
> Hi,
> 
> 1394 OHCI hardware triggers PCI interrupts to notify any events to
> software. Current driver for the hardware is programmed by the typical
> way to utilize top- and bottom- halves, thus it has a timing gap to handle
> the notification in softIRQ (tasklet). The Linux Kernel Tracepoints
> framework is enough useful to trace the interaction between 1394 OHCI
> hardware and its driver.
> 
> This series of changes adds support for tracepoints events to the
> driver, and adds an event, 'irqs', so that comparison of the event and
> any event in firewire subsystem is helpful to diagnose the timing gap.
> 
> Takashi Sakamoto (2):
>   firewire: ohci: add support for Linux kernel tracepoints
>   firewire: ohci: add tracepoints event for hardIRQ event
> 
>  drivers/firewire/ohci.c              |  4 +++
>  include/trace/events/firewire.h      |  1 +
>  include/trace/events/firewire_ohci.h | 47 ++++++++++++++++++++++++++++
>  3 files changed, 52 insertions(+)
>  create mode 100644 include/trace/events/firewire_ohci.h

Applied to for-next branch.


Regards

Takashi Sakamoto