netdev - Re: [PATCH 2/9] dma: Convert from tasklet to BH workqueue

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Message-ID: <CAOMdWSKC4B8zn6N+=5DssB_BiR6JkHBEpJr0ohKb149eJvCKMQ@mail.gmail.com>
Date: Thu, 28 Mar 2024 13:01:55 -0700
From: Allen <allen.lkml@...il.com>
To: Arnd Bergmann <arnd@...db.de>
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Subject: Re: [PATCH 2/9] dma: Convert from tasklet to BH workqueue

> >> > Since almost every driver associates the tasklet with the
> >> > dma_chan, we could go one step further and add the
> >> > work_queue structure directly into struct dma_chan,
> >> > with the wrapper operating on the dma_chan rather than
> >> > the work_queue.
> >>
> >> I think that is very great idea. having this wrapped in dma_chan would
> >> be very good way as well
> >>
> >> Am not sure if Allen is up for it :-)
> >
> >  Thanks Arnd, I know we did speak about this at LPC. I did start
> > working on using completion. I dropped it as I thought it would
> > be easier to move to workqueues.
>
> It's definitely easier to do the workqueue conversion as a first
> step, and I agree adding support for the completion right away is
> probably too much. Moving the work_struct into the dma_chan
> is probably not too hard though, if you leave your current
> approach for the cases where the tasklet is part of the
> dma_dev rather than the dma_chan.
>

 Alright, I will work on moving work_struck into the dma_chan and
leave the dma_dev as is (using bh workqueues) and post a RFC.
Once reviewed, I could move to the next step.

Thank you.

- Allen