From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Guenter Roeck <linux@roeck-us.net>
Cc: "Pádraig Brady" <P@draigBrady.com>,
linux-watchdog@vger.kernel.org,
"Wim Van Sebroeck" <wim@iguana.be>,
linux-kernel@vger.kernel.org,
"Timo Kokkonen" <timo.kokkonen@offcode.fi>,
linux-doc@vger.kernel.org, "Jonathan Corbet" <corbet@lwn.net>,
kernel@pengutronix.de
Subject: Re: [PATCH 0/8] watchdog: Add support for keepalives triggered by infrastructure
Date: Wed, 5 Aug 2015 10:27:21 +0200 [thread overview]
Message-ID: <20150805082721.GY9999@pengutronix.de> (raw)
In-Reply-To: <55C1C041.3080504@roeck-us.net>
Hello Guenter,
On Wed, Aug 05, 2015 at 12:50:25AM -0700, Guenter Roeck wrote:
> On 08/05/2015 12:36 AM, Uwe Kleine-König wrote:
> >the watchdog I'm currently working with on a powerpc platform has a
> >unchangable timeout of ~1 s. To make the machine boot I patched the
> >bootloader and need some automatic pinging in the kernel before
> >userspace takes over.
> >
>
> Does using arch_initcall in the watchdog driver help here, or is that
> still too slow and you really need to hack the kernel ?
I didn't do any measurements yet, but having the bootloader extracting
the kernel, and then send a ping before jumping into it is good enough
even without CONFIG_GPIO_WATCHDOG_ARCH_INITCALL to get the machine up.
(Userspace doesn't do any watchdog handling yet.)
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
next prev parent reply other threads:[~2015-08-05 8:27 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-04 2:13 [PATCH 0/8] watchdog: Add support for keepalives triggered by infrastructure Guenter Roeck
2015-08-04 2:13 ` [PATCH 1/8] watchdog: watchdog_dev: Use single variable name for struct watchdog_device Guenter Roeck
2015-08-04 11:26 ` Uwe Kleine-König
2015-08-04 2:13 ` [PATCH 2/8] watchdog: Introduce hardware maximum timeout in watchdog core Guenter Roeck
2015-08-04 12:18 ` Uwe Kleine-König
2015-08-04 15:31 ` Guenter Roeck
2015-08-04 15:31 ` Guenter Roeck
2015-08-04 15:52 ` Uwe Kleine-König
2015-08-04 16:03 ` Guenter Roeck
2015-08-05 8:22 ` Uwe Kleine-König
2015-08-05 9:14 ` Guenter Roeck
2015-08-04 2:13 ` [PATCH 3/8] watchdog: Introduce WDOG_RUNNING flag Guenter Roeck
2015-08-04 12:25 ` Uwe Kleine-König
2015-08-04 15:41 ` Uwe Kleine-König
2015-08-04 15:56 ` Guenter Roeck
2015-08-04 2:13 ` [PATCH 4/8] watchdog: Make set_timeout function optional Guenter Roeck
2015-08-04 15:38 ` Uwe Kleine-König
2015-08-04 16:43 ` Guenter Roeck
2015-08-04 2:13 ` [PATCH 5/8] watchdog: imx2: Convert to use infrastructure triggered keepalives Guenter Roeck
2015-08-04 15:44 ` Uwe Kleine-König
2015-08-04 2:13 ` [PATCH 6/8] watchdog: retu: " Guenter Roeck
2015-08-04 2:13 ` [PATCH 7/8] watchdog: gpio_wdt: " Guenter Roeck
2015-08-04 2:13 ` [PATCH 8/8] watchdog: at91sam9: " Guenter Roeck
2015-08-04 11:24 ` [PATCH 0/8] watchdog: Add support for keepalives triggered by infrastructure Uwe Kleine-König
2015-08-04 15:01 ` Guenter Roeck
2015-08-04 23:43 ` Pádraig Brady
2015-08-05 0:49 ` Guenter Roeck
2015-08-05 7:36 ` Uwe Kleine-König
2015-08-05 7:50 ` Guenter Roeck
2015-08-05 7:50 ` Guenter Roeck
2015-08-05 8:27 ` Uwe Kleine-König [this message]
2015-08-05 17:13 ` David Teigland
2015-08-05 17:41 ` Guenter Roeck
2015-08-05 17:51 ` David Teigland
2015-08-05 19:01 ` Guenter Roeck
2015-08-05 19:51 ` David Teigland
2015-08-05 20:21 ` Guenter Roeck
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