On Thu, Aug 10, 2006 at 12:09:56AM -0600, Eric W. Biederman wrote: > Don Zickus <[EMAIL PROTECTED]> writes: > > >> Looking at my build it appears bytes_out is being placed in the .bss. > >> A little odd since it is zero initialized but no big deal. > >> Could you confirm that bytes_out is being placed in the .bss section > >> by inspecting arch/x86_64/boot/compresssed/misc.o and > >> arch/x86_64/boot_compressed/vmlinux. "readelf -a $file" and then > >> looking up the section number and looking at the section table to see > >> which section it is was my technique. > >> > >> If bytes_out is in the .bss for you then I suspect something is not > >> correctly zeroing the .bss. Or else the .bss is being stomped. > >> > >> I'm not certain how rep stosb can be done wrong but some bad pointer > >> math could have done it. > >> > >> Eric > > > > It seems Vivek came up with a solution that works. He sent it to me this > > morning. We tested a bunch of machines and things seem to work now. It > > looks like it mimics the i386 behaviour now. > > Yes, this looks right. It looks like I forgot to make this change when > the logic from i386 was adopted to x86_64, ages ago. > > This is exactly the place in the code I would have expected a bug > from the symptoms you were seeing. > > Thanks all I will include this in my version of the patches.
Apart from this I think something is still off on x86_64. I have not been able to make kdump work on x86_64. Second kernel simply hangs. Two different machines are showing different results. - On one machine, it seems to be stuck somewhere in decompress_kernel(). Serial console is not behaving properly even with earlyprintk(). Somehow I feel it is some bss corruption even after my changes. - Other machines seems to be going till start_kernel() and even after that (No messages on the console, all serial debugging) and then either it hangs or jumps back to BIOS. Will look more into it. Thanks Vivek _______________________________________________ fastboot mailing list [email protected] https://lists.osdl.org/mailman/listinfo/fastboot
