linux-kernel - Re: [PATCH v6 6/8] cxl/test: Add generic mock events

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Date:   Fri, 13 Jan 2023 13:27:03 +0000
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Ira Weiny <ira.weiny@...el.com>
CC:     Dan Williams <dan.j.williams@...el.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        Dave Jiang <dave.jiang@...el.com>,
        Ben Widawsky <bwidawsk@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <linux-acpi@...r.kernel.org>, <linux-cxl@...r.kernel.org>
Subject: Re: [PATCH v6 6/8] cxl/test: Add generic mock events

On Mon, 09 Jan 2023 11:42:25 -0800
Ira Weiny <ira.weiny@...el.com> wrote:

> Facilitate testing basic Get/Clear Event functionality by creating
> multiple logs and generic events with made up UUID's.
> 
> Data is completely made up with data patterns which should be easy to
> spot in trace output.
> 
> A single sysfs entry resets the event data and triggers collecting the
> events for testing.
> 
> Test traces are easy to obtain with a small script such as this:
> 
> 	#!/bin/bash -x
> 
> 	devices=`find /sys/devices/platform -name cxl_mem*`
> 
> 	# Turn on tracing
> 	echo "" > /sys/kernel/tracing/trace
> 	echo 1 > /sys/kernel/tracing/events/cxl/enable
> 	echo 1 > /sys/kernel/tracing/tracing_on
> 
> 	# Generate fake interrupt
> 	for device in $devices; do
> 	        echo 1 > $device/event_trigger
> 	done
> 
> 	# Turn off tracing and report events
> 	echo 0 > /sys/kernel/tracing/tracing_on
> 	cat /sys/kernel/tracing/trace
> 
> Reviewed-by: Dan Williams <dan.j.williams@...el.com>
> Signed-off-by: Ira Weiny <ira.weiny@...el.com>

Looks like it will test the kernel functionality in this
patch set correctly to me. 

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>