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    SubjectRe: [PATCH] x86: Setup early console as early as possible
    Hi Yingahai,

    Yinghai Lu wrote:
    > On 07/12/2010 08:47 AM, H. Peter Anvin wrote:
    >> On 07/12/2010 01:58 AM, Pekka Enberg wrote:
    >>> Hi Yinghai,
    >>> Yinghai Lu wrote:
    >>>> Analyze "console=uart8250,io,0x3f8,115200n8" in
    >>>> i386_start_kernel/x86_64_start_kernel,
    >>>> and call setup_early_serial8250_console() to init early serial console.
    >>>> only can handle io port kind of 8250. because mmio need ioremap.
    >>>> Signed-off-by: Yinghai Lu <>
    >>> What's the purpose of this patch? Does it make my early boot I/O patch
    >>> obsolete?
    >>> Pekka
    >> No, they're complementary. Your patch serial-port enables the RM
    >> kernel, whereas Yinghai pushes the initialization earlier in the PM kernel.
    > yes. cover more range.
    > Can you consider to ask Pekka to anaylze "console=uart8250,io, 0x3f8,115200n8" instead?
    > it looks like we can remove "earlyprintk=ttyS0,115200", or "earlyprintk=serial" etc.
    > earlycon=uart8250 or console=uart8250 should be better than earlyprintk.
    > because it is shared between different archs already.

    So just to clarify: I wasn't ignoring your comment here. I simply
    followed hpa's recommendation on which I also happen to agree with
    completely. ;-)


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