Messages in this thread | | | Date | Mon, 31 Jul 2006 17:00:50 -0400 | From | Vivek Goyal <> | Subject | Re: [Fastboot] [CFT] ELF Relocatable x86 and x86_64 bzImages |
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On Mon, Jul 31, 2006 at 04:25:20PM -0400, Vivek Goyal wrote: > On Mon, Jul 31, 2006 at 10:19:04AM -0600, Eric W. Biederman wrote: > > > > I have spent some time and have gotten my relocatable kernel patches > > working against the latest kernels. I intend to push this upstream > > shortly. > > > > Could all of the people who care take a look and test this out > > to make certain that it doesn't just work on my test box? > > > Hi Eric, > > Currently I am testing your patches on i386. With CONFIG_RELOCATABLE=y > kernel boots fine and kexec also works. > > But my kernel hangs on kexec on panic case. It hangs early in > decompress_kernel(). Kernel hangs at following condition. > > + if (((u32)output - CONFIG_PHYSICAL_START) & 0x3fffff) > + error("Destination address not 4M aligned"); >
Ok. I am decompressing the kernel to 16MB and after reducing 1MB of CONFIG_PHYSICAL_START I am left with 15MB which is not 4M aligned hence I seems to be running into it.
I changed it to
if ((u32)output) & 0x3fffff)
and kdump kernel booted fine. But this will run into issues if I load kernel at 1MB.
I got a dump question. Why do I have to load the kernel at 4MB alignment? Existing kernel boots loads at 1MB, which is non 4MB aligned and it works fine?
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