* Alexander Kuleshov <[email protected]> wrote: > 2015-04-07 15:52 GMT+06:00 Ingo Molnar <[email protected]>: > > > > It would be nice to test it via a well placed printk() and check that > > before the patch the message doesn't go to the serial console and > > after the patch the message indeed arrives on the early serial console > > - or something like that. > > I have tested this patch when i wrote it and early_printk does not print > anything before the parse_early_param. But i don't know how to show this > in code in a correct way. [...]
Just add a debug printk() for your own testing, right after the param initialization call, to be confident that the early console indeed works. > which i removed in the previous patch > (https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=91d8f0416f3989e248d3a3d3efb821eda10a85d2)? > > Any one another question about this. I submited patch only for > head64.c and it does not affect kernel for i386, because i'm not > sure where is the best place to setup earlyprintk in the head32.c. I > thought to put it in the start of i386_start_kernel(void) (from > head32.c) but not sure about it. I'd use i386_start_kernel() on 32-bit and x86_64_start_kernel() on 64-bit - but I haven't tested whether it actually works. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
