Messages in this thread | | | Date | Thu, 16 Aug 2007 12:47:41 -0400 | From | "Mike Frysinger" <> | Subject | Re: Early printk behaviour |
| |
On 8/16/07, Gerd Hoffmann <kraxel@redhat.com> wrote: > Robin Getz wrote: > > I was putting together an early printk implementation for the Blackfin, and > > was wondering what the expected behaviour was in this situation. > > > > When I set up my bootargs earlyprintk=serial,ttyBF0,57600 and have no console > > defined (no graphical console, no serial console). > > > > based on the patch: > > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=69331af79cf29e26d1231152a172a1a10c2df511 > > > > which no longer calls disable_early_printk, the earlyprintk console never gets > > turned off (because nothing else ever calls register_console). I get > > everything out the early console, until the init section is released (where > > the console structure is sitting), and it starts printing out garbage. > > > > Is this expected behaviour? > > Hmm, sort of, although I didn't think about the case of no real console > replacing the early console. The intention of the patch is to have a > smooth handover from the boot console to the real console. And, yes, if > no real console is ever registered the boot console keeps running ...
i think it also occurs in the case where real console != early console
> So you can either let it running and *not* mark it __init, so it can > keep on going without breaking. Or you can explicitly unregister your > boot console at some point, maybe using a late_initcall.
wouldnt a common kernel late_initcall() be more appropriate ? if early console hasnt switched over (for whatever reason), then kill it ... -mike - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |