linux-kernel - Re: [BUG] kernel 2.6.33-rc4 OOPS's with large initramfs

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Date:	Sat, 20 Mar 2010 22:26:41 +0000
From:	Nigel Kukard <nkukard@...d.net>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] kernel 2.6.33-rc4 OOPS's with large initramfs


>>>>> How much RAM are you giving your VM?  The default for Qemu is 128 MB,
>>>>> and if you have a 110 MB initramfs it's hardly surprising that you get
>>>>> an out of memory error.
>>>>>       
>>>>>           
>>>> The kernel now boots where it booted for my 64bit box.
>>>>
>>>> The main problem though is the instant reboots for bzip2 and lzma
>>>> compressed initramfs images. The change for printf to /usr/bin/printf
>>>> both render the sane end result when run with the same commandline being
>>>> run in the makefile, so this isn't the issue.
>>>>
>>>>     
>>>>         
>>> Oh, you have *that* problem.
>>>
>>> What printf is being used?
>>>       
>> coreutils 8.4 and 7.5 and bash all give me the same result for the
>> commandline being run. This was just one of the things I tried and it
>> didn't fix the problem.
>>
>> Here is what is run from the buildlog...
>>   (cat arch/x86/boot/compressed/vmlinux.bin | lzma -9 && printf
>> \\150\\111\\241\\007) > arch/x86/boot/compressed/vmlinux.bin.lzma || (rm
>> -f arch/x86/boot/compressed/vmlinux.bin.lzma ; false)
>>
>> I tested printf out...
>> # printf \\150\\111\\241\\007 | xxd
>> 0000000: 6849 a107                                hI..
>>
>> coreutils 7.5
>> # /usr/bin/printf \\150\\111\\241\\007 | xxd
>> 0000000: 6849 a107                                hI..
>>
>> coreutils 8.4
>> # /usr/bin/printf \\150\\111\\241\\007 | xxd
>> 0000000: 6849 a107                                hI..
>>
>>
>> That confirms it? its not the b0rked printf issue afaics :)
>>
>>     
> Okay, so why the f*ck did you mention that instead of answering the
> question I asked?  *How much memory does your VM have?*

Sorry, had 128M , now has 2G. The tests now render the same results
between qemu and plain hardware.

The reason I mentioned the printf issue is it causes this exact problem,
I just wanted you to know that I've already touched that base to rule it
out. Sorry.



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