Re: Bug on Kernel 3.16 r6: Sound and Buffering in Clementine with Files are Transferring to Music Directory

[Nick Krause]

On Mon, Jul 28, 2014 at 5:54 AM, Heinz Diehl <htd@xxxxxxxxxxxxxxxxx> wrote:
> First: my email you are quoting here was sent to you directly, off-list,
> because it only contains common stuff and has nothing to do with
> kernel development. In other words to avoid annoying lkml people.
> In addition, I placed an "Reply-to" header pointing back to me.
> Despite, you *manually* redirected your answer to my private mail
> back to the list, thus annoying people and breaking the informational
> flow of this thread.
>
>
> On 27.07.2014, Nick Krause wrote:
>
>> I am transferring into the same directory for the music
>> I am listening to.
>
> So you produce a lot of disk I/O by writing/reading from the same disk
> at the same time, and as you encounter stalls, you take this for a
> kernel bug (which clearly is not). These stalls are most probably
> caused by fsync() flushing your data/buffers, which is blocking.
>
> So moving the music data you are listening to to another disk would
> make things a lot easier.
>
>> In addition , my cpu usage when doing this is half of my older
>
> DMA transfer is mostly done be the controller itself, and not the CPU.
>
> Btw, EOT for me.
>
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Then explain to me why this is only happening on recent rc kernels and not
the Ubuntu distro kernels I was using before. Seems weird that only
recent rc kernels are triggering this.
Regards Nick
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