From: Robert Jarzmik <robert.jarzmik@free.fr>
To: Jisheng Zhang <jszhang@kernel.org>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>,
Doug Berger <opendmb@gmail.com>,
Florian Fainelli <florian.fainelli@broadcom.com>,
bcm-kernel-feedback-list@broadcom.com,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <brgl@bgdev.pl>,
Hoan Tran <hoan@os.amperecomputing.com>,
Andy Shevchenko <andy@kernel.org>,
Daniel Palmer <daniel@thingy.jp>,
Romain Perier <romain.perier@gmail.com>,
Grygorii Strashko <grygorii.strashko@ti.com>,
Santosh Shilimkar <ssantosh@kernel.org>,
Kevin Hilman <khilman@kernel.org>,
Kunihiko Hayashi <hayashi.kunihiko@socionext.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Shubhrajyoti Datta <shubhrajyoti.datta@amd.com>,
Srinivas Neeli <srinivas.neeli@amd.com>,
Michal Simek <michal.simek@amd.com>,
linux-gpio@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org
Subject: Re: [PATCH v2 05/15] gpio: pxa: Use modern PM macros
Date: Thu, 20 Nov 2025 21:48:30 +0100 [thread overview]
Message-ID: <m28qg0mnvl.fsf@free.fr> (raw)
In-Reply-To: <aR22decsE0DYDUnS@xhacker> (Jisheng Zhang's message of "Wed, 19 Nov 2025 20:22:13 +0800")
Jisheng Zhang <jszhang@kernel.org> writes:
> On Tue, Nov 18, 2025 at 11:03:41PM +0100, Robert Jarzmik wrote:
>
> hmm, each controller adds 16bytes, then even on 100 controller
> platforms
> 1600bytes. 1600 Bytes/64MB ~= 0.238%. it's trival. And is there
> such platform?
Yes, actually most of them have around 64MB, at least the pxa25x
and pxa27x.
The pxa3xx might have more (thing 128MB, maybe 256MB).
There are very old platforms, we're in 2003/2004 there ...
> From another side, recently UP support is removed from the core
> sched,
> that removing adds more .text and .data overhead, so if the
> users really
> care about this kind of 16bytes, it means he(she) can't afford
> even the
> 16Bytes overhead, then I bet he(she) the always SMP in core
> sched, so
> why not stick with the old kernel? What do you think?
I think I would go with Andy's proposal, decouple the changes :
- keep your changes in the PM callbaks
- remove your change (put back the ifdef) in the data structure
Cheers.
--
Robert
next prev parent reply other threads:[~2025-11-20 20:49 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-18 0:32 [PATCH v2 00/15] gpio: Use modern PM macros Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 01/15] gpio: dwapb: " Jisheng Zhang
2025-11-18 10:15 ` Andy Shevchenko
2025-11-19 12:42 ` Jisheng Zhang
2025-11-19 12:59 ` Jisheng Zhang
2025-11-19 14:05 ` Andy Shevchenko
2025-11-18 0:32 ` [PATCH v2 02/15] gpio: brcmstb: " Jisheng Zhang
2025-11-18 18:35 ` Florian Fainelli
2025-11-18 0:32 ` [PATCH v2 03/15] gpio: htc-egpio: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 04/15] gpio: pl061: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 05/15] gpio: pxa: " Jisheng Zhang
2025-11-18 12:06 ` Andy Shevchenko
2025-11-18 22:03 ` Robert Jarzmik
2025-11-19 7:56 ` Andy Shevchenko
2025-11-19 12:47 ` Jisheng Zhang
2025-11-19 13:58 ` Andy Shevchenko
2025-11-19 12:22 ` Jisheng Zhang
2025-11-20 20:48 ` Robert Jarzmik [this message]
2025-11-21 9:20 ` Andy Shevchenko
2025-11-18 0:32 ` [PATCH v2 06/15] gpio: ml-ioh: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 07/15] gpio: mlxbf2: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 08/15] gpio: msc313: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 09/15] gpio: omap: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 10/15] gpio: pch: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 11/15] gpio: tqmx86: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 12/15] gpio: uniphier: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 13/15] gpio: xgene: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 14/15] gpio: xilinx: " Jisheng Zhang
2025-11-18 0:32 ` [PATCH v2 15/15] gpio: zynq: " Jisheng Zhang
2025-11-19 13:40 ` [PATCH v2 00/15] gpio: " Linus Walleij
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