linux-kernel - Re: [PATCH v1 0/2] svc-i3c-master: Reduce IBI transaction time

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Message-ID: <CAPwEoQOuvwzf+VcXJpx0LB0v_ZdCoB=rJW_ekHYo6ATY57LYDA@mail.gmail.com>
Date: Fri, 18 Apr 2025 15:39:54 +0800
From: Stanley Chu <stanley.chuys@...il.com>
To: Miquel Raynal <miquel.raynal@...tlin.com>
Cc: frank.li@....com, alexandre.belloni@...tlin.com, 
	linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	tomer.maimon@...oton.com, kwliu@...oton.com, yschu@...oton.com
Subject: Re: [PATCH v1 0/2] svc-i3c-master: Reduce IBI transaction time

On Tue, Apr 15, 2025 at 4:31 PM Miquel Raynal <miquel.raynal@...tlin.com> wrote:
>
> On 15/04/2025 at 13:18:06 +08, Stanley Chu <stanley.chuys@...il.com> wrote:
>
> > This patchset reduces the IBI transaction time by the following
> > improvements.
> > 1. Receive the request in interrupt context.
>
> I initially had a few concerns about that, especially since the wait
> periods were bounded to 1s, but actually we are already in the irqsave

Hi Miquel,
The poll timeout is 1 ms. Normally, the IBI can be completed in a few us.

Thanks,
Stanley

> situation when running this code, so your series might not have
> such a huge system-wide performance impact in the end.
>
> > 2. Emit the STOP as soon as possible.
>
> Acked-by: Miquel Raynal <miquel.raynal@...tlin.com>
>
> Thanks,
> Miquèl