Messages in this thread | | | Date | Tue, 7 Apr 2015 16:03:17 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 1/2 v2] x86_64/earlyprintk: setup earlyprintk as early as possible |
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* Alexander Kuleshov <kuleshovmail@gmail.com> wrote:
> 2015-04-07 17:35 GMT+06:00 Ingo Molnar <mingo@kernel.org>: > > > > > > So if you set up earlyprintk via CONFIG_CMDLINE_OVERRIDE it just > > works? > > > > Look, how i did it. I set: > > CONFIG_CMDLINE_BOOL =y > CONFIG_CMDLINE_OVERRIDE =y > > and passed following string: > > [=root=/dev/sdb earlyprintk=ttyS0 loglevel=7 debug rdinit=/sbin/init > root=/dev/ram memblock=debug] > > to the CONFIG_CMDLINE. > > Now i put two early_printk calls before and after earlyprintk initialization: > > early_printk("before setup_early_printk \n"); > setup_early_printk(boot_command_line); > early_printk("after setup_early_printk \n"); > > And i don't see first string, but see last. > > Did i make something wrong?
Yes, you need to check how and where in the arch init code boot_command_line is set up in the CONFIG_CMDLINE_OVERRIDE=y case.
Thanks,
Ingo
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