From: Peter Korsgaard <peter@korsgaard.com>
To: Vineet Gupta <vgupta@synopsys.com>
Cc: linux-arch@vger.kernel.org, Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
John Ogness <john.ogness@linutronix.de>,
Shreyas Joshi <shreyas.joshi@biamp.com>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
buildroot@busybox.net, arcml <linux-snps-arc@lists.infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
shreyasjoshi15@gmail.com, Guenter Roeck <linux@roeck-us.net>
Subject: Re: ARC no console output (was Re: [PATCH 1/2] init/console: Use ttynull as a fallback when there is no console)
Date: Wed, 13 Jan 2021 23:07:45 +0100 [thread overview]
Message-ID: <87turkfq32.fsf@dell.be.48ers.dk> (raw)
In-Reply-To: <466644f5-bed7-caef-9fcd-e66208f65545@synopsys.com> (Vineet Gupta's message of "Thu, 7 Jan 2021 09:58:05 -0800")
>>>>> "Vineet" == Vineet Gupta <vgupta@synopsys.com> writes:
> On 1/7/21 9:04 AM, Petr Mladek wrote:
>> On Thu 2021-01-07 08:43:16, Vineet Gupta wrote:
>>> Hi John,
>>>
>>> On 1/7/21 1:02 AM, John Ogness wrote:
>>>> Hi Vineet,
>>>>
>>>> On 2021-01-06, Vineet Gupta <vgupta@synopsys.com> wrote:
>>>>> This breaks ARC booting (no output on console).
>>>>
>>>> Could you provide the kernel boot arguments that you use? This series is
>>>> partly about addressing users that have used boot arguments that are
>>>> technically incorrect (even if had worked). Seeing the boot arguments of
>>>> users that are not experiencing problems may help to reveal some of the
>>>> unusual console usages until now.
>>>
>>>
>>> Kernel command line: earlycon=uart8250,mmio32,0xf0005000,115200n8
>>> console=ttyS0,115200n8 debug print-fatal-signals=1
>>
>> This is strange, the problematic patch should use ttynull
>> only as a fallback. It should not be used when a particular console
>> is defined on the command line.
> What happens in my case is console_on_rootfs() doesn't find
> /dev/console and switching to ttynull. /dev is not present because
> devtmpfs doesn't automount for initramfs.
But our initramfs/cpio logic ensures that the initramfs has a static
/dev/console device node, so how can that be?
https://git.buildroot.net/buildroot/tree/fs/cpio/cpio.mk#n25
--
Bye, Peter Korsgaard
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next prev parent reply other threads:[~2021-01-13 22:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201111135450.11214-1-pmladek@suse.com>
[not found] ` <20201111135450.11214-2-pmladek@suse.com>
2021-01-06 23:36 ` ARC no console output (was Re: [PATCH 1/2] init/console: Use ttynull as a fallback when there is no console) Vineet Gupta
2021-01-07 9:02 ` John Ogness
2021-01-07 13:14 ` Greg Ungerer
2021-01-07 16:43 ` Vineet Gupta
2021-01-07 17:04 ` Petr Mladek
2021-01-07 17:58 ` Vineet Gupta
2021-01-08 3:48 ` Sergey Senozhatsky
2021-01-08 5:18 ` Vineet Gupta
2021-01-08 9:30 ` Petr Mladek
2021-01-13 22:07 ` Peter Korsgaard [this message]
2021-01-07 9:09 ` Richard Weinberger
2021-01-07 12:48 ` Petr Mladek
2021-01-07 15:27 ` [Buildroot] " Yann E. MORIN
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