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SubjectRe: stat of /proc fails after CPU hot-unplug with EOVERFLOW in 2.6.18
Andrew Morton wrote:
> On Wed, 27 Sep 2006 09:55:47 +0200
> Martin Devera <devik@cdi.cz> wrote:
>
>> Hello,
>>
>> I have 2way Opteron machine. I've done this:
>> echo 0 > /sys/devices/system/cpu/cpu1/online
>>
>> and then strace stat /proc:
>>
>> [snip]
>> personality(PER_LINUX) = 4194304
>> getpid() = 14926
>> brk(0) = 0x804b000
>> brk(0x804b1a0) = 0x804b1a0
>> brk(0x804c000) = 0x804c000
>> stat("/proc", 0xbf8e7490) = -1 EOVERFLOW
>>
>> When I do echo 1 > ... to start cpu again then the stat starts
>> to work again ... Weird.
>>
>
> boggle.
>
> Can you add this patch, see where it's going bad?

Ehh .. I finally learned how to code jprobe (I can't reboot the machine now),
tested, installed and ... guess what ? The overflow bug is gone :-(
It simply works now.
I will reboot it next week and try again.

thanks for a help and sorry for your wasted time,
Martin
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