Messages in this thread | | | From | Kay Sievers <> | Date | Fri, 6 Jul 2012 02:56:19 +0200 | Subject | Re: [PATCH v3] printk: Have printk() never buffer its data |
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On Fri, Jul 6, 2012 at 2:41 AM, Michael Neuling <mikey@neuling.org> wrote:
>> > Does this happen only very early during bootup, or also later when the >> > box fully initialized? > > I'm seeing during boot but not later (xmon (ppc kernel debugger) doesn't > see it if I do 'echo x > /proc/sysrq-trigger') . I wouldn't say > it's "very early boot". It's a secondary CPU coming up and the primary > is waiting for it. We've already configured the console when this > happens.
Sounds like an early boot console.
>> > The output of 'dmesg' later looks always correct, right? > > No, dmesg also has the extra new lines: eg > > <4>NIP: c00000000004e234 LR: c00000000004e230 CTR: 0000000000000000 > <4>REGS: c00000007c3b7b50 TRAP: 0700 Tainted: G W (3.5.0-rc4-mikey) > <4>MSR: 9000000000021032 > <4>< > <4>SF > <4>,HV > <4>,ME > <4>,IR > <4>,DR > <4>,RI > <4>> > <4> CR: 28000042 XER: 22000000
Can you please paste the output of /dev/kmsg of this section? So we can see the timestamps and what really went into the record buffer.
>> Could you possibly try this patch? > > Sorry, doesn't help. It also reprints the entire boot log to the > console once the console get inited.
Which is the normal behaviour to do that, right? We should not have touched any of that logic.
Thanks, Kay
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