linux-kernel - Re: [PATCH 09/10] dmatest: gather test results in the linked list

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Date:	Wed, 06 Nov 2013 16:13:41 +0200
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Vinod Koul <vinod.koul@...el.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	dmaengine@...r.kernel.org
Subject: Re: [PATCH 09/10] dmatest: gather test results in the linked list

On Tue, 2013-11-05 at 11:58 -0800, Dan Williams wrote:
> On Mon, Mar 4, 2013 at 1:09 AM, Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> > The patch provides a storage for the test results in the linked list. The
> > gathered data could be used after test is done.
> >
> > The new file 'results' represents gathered data of the in progress test. The
> > messages collected are printed to the kernel log as well.
> >
> > Example of output:
> >         % cat /sys/kernel/debug/dmatest/results
> >         dma0chan0-copy0: #1: No errors with src_off=0x7bf dst_off=0x8ad len=0x3fea (0)
> >
> > The message format is unified across the different types of errors. A number in
> > the parens represents additional information, e.g. error code, error counter,
> > or status.
> >
> > Note that the buffer comparison is done in the old way, i.e. data is not
> > collected and just printed out.
> >
> 
> I need to revert this to get my testing done as it just leaks memory
> for no real benefit that I can see.  Outside of making the log
> messages have a uniform format I'm not seeing the case for this?  I'll
> revert and add a pr_fmt to make dmatest messages readily parseable.


The benefit of it is to access to the results asynchronously as many
times as tester wants to.

Actually I wonder where you found memory leak. It keeps the result only
for the last test run.

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy
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