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@xxxxxxxxxxxx> 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.
The only explanation would be that ttyS0 gets registered too late
and ttynull is added as a fallback in the meantime.
I don't know if ttyS0 console should have registered already but even if
it did - the /dev node missing would not have helped ?
Anyway, I propose the revert the problematic patch for 5.11-rc3,
see
https://lore.kernel.org/lkml/20210107164400.17904-2-pmladek@xxxxxxxx/
This mystery is a good reason to avoid bigger changes at this stage.
Best Regards,
Petr
