H. Peter Anvin пишет:
On 10/09/2009 07:58 AM, Cyrill Gorcunov wrote:
Peter and Sam CC'ed
[Michael Tokarev - Fri, Oct 09, 2009 at 06:17:50PM +0400]
Ok, finally the mystery solved. After a week of
digging.
The original problem was titled "Cannot boot on
a PIII Celeron", and Rafael filed a bug #14270
for this.
In short, what I observed was that a new kernel
(2.6.31) fails to boot on a PIII Celeron machine.
But changing just the CPU to plain PIII and voila,
it now works. I don't know why it behaved this
way, but I found where was the problem, finally.
We should switch to printf here. Hexadecimal constants in echo aren't
guaranteed by POSIX.
That's what I initially proposed. However, as Scott Olson pointed
out, there's already a fix for this:
http://lkml.org/lkml/2009/8/19/84
http://patchwork.kernel.org/patch/42564/
which uses still-non-portable /bin/echo.
(I wish I knew about it a week before now - it wasn't a pleasant week for me).
Still an interesting result. I can understand if it failed
for systems with smaller amounts of memory, -- nope, it fails
with Celeron on a 64Mb system, but works on the same system
if I replace the CPU to a real PIII... Fun.
/mjt
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