Messages in this thread | | | From | Daniel Palmer <> | Date | Mon, 20 Jun 2022 19:38:37 +0900 | Subject | Re: Boot stall regression from "printk for 5.19" merge |
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Hi Marek,
On Mon, 20 Jun 2022 at 03:51, Marek Behún <kabel@kernel.org> wrote: > > Hello Linus, Petr, John, > > the series > https://lore.kernel.org/linux-kernel/YouKQw72H7y9EJQK@alley/ > merged by commit 537e62c865dc ("Merge tag 'printk-for-5.19' of > git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux") > > and in particular the commit 09c5ba0aa2fc ("printk: add kthread console > printers") > > causes a regression on arm64 (Marvell CN9130-CRB board) where the > system boot freezes in most cases (and is unusable until restarted by > watchdog), or, in some cases boots, but the console output gets mangled > for a while (the serial console spits garbage characters).
FWIW I have seen a similar issue to this on a totally different machine/board on arm (Sigmastar SSD202D, "mstarv7" in the kernel..) since rebasing my tree on 5.19. I don't see lock ups all the time but every few boots the machine will deadlock. Usually with garbage as the last message on serial. With both serial and a display as consoles on the command line I could sometimes see more output on the display but I didn't manage to debug it. Adding quiet to the command line made it go away so I've been doing that as workaround.
Serial driver in question is 8250_dw.c
Cheers,
Daniel
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