Re: am335x: load a kernel with integrated initramfs

[Sascha Hauer <s.hauer@pengutronix.de>]

On Mon, Mar 23, 2020 at 01:22:33PM +0100, Yegor Yefremov wrote:
> Hi Sascha,
> 
> On Mon, Mar 23, 2020 at 9:30 AM Sascha Hauer <s.hauer@pengutronix.de> wrote:
> >
> > Hi Yegor,
> >
> > On Fri, Mar 20, 2020 at 09:29:04AM +0100, Yegor Yefremov wrote:
> > > I get an "handler failed with: Out of memory" message when trying to
> > > load my 22MB large kernel-fit.itb. Below you can see the related log:
> > >
> > > mounted /dev/nand0.UBI.ubi.kernel on /mnt/nand0.UBI.ubi.kernel
> > > YY: bootm_boot
> > > YY: read file 0, size 22661672, PAGE_SIZE 4096
> > > YY: fit_open
> > > FIT: Opened FIT image: Simple image with single Linux kernel and FDT blob
> > > FIT: configuration 'conf221@1': Boot Linux kernel with FDT blob (221)
> > > FIT: image 'kernel@1': 'Vanilla Linux kernel'
> > > FIT: /images/kernel@1/hash@1: hash OK
> > >
> > > Loading open firmware Device Tree flattened Binary
> > > '/mnt/nand0.UBI.ubi.kernel/kernel-fit.itb'
> > > OS image not yet relocated
> > > Passing control to FIT image handler
> > > YY: do_bootm_linux
> > > YY: before bootm_load_os
> > > YY: bootm_load_os
> > > YY: kernel size 22484352
> > > YY: for each memory bank: size 22484352
> > > __request_region: 0x86b37000:0x880a857f conflicts with 0x87efe860:0x8fdfd0bf
> >
> > So your kernel has a size of 22484352 bytes. We want to places the
> > kernel at a place where we do not risk that it overwrites itself during
> > decompression. We assume that the kernel gets five times bigger during
> > decompression. So we put it at 0x80000000 + 22484352 * 5. Here the image
> > takes 22484352 bytes, so ends at 0x80000000 + 22484352 * (5 + 1) which
> > is already inside the malloc area.
> >
> > Try the attached patch, it should solve that issue.
> 
> No, it doesn't. But reducing the malloc size helped. I have tried the
> reduced size with and without the fix.

Nevertheless I would still be interested why the patch doesn't work.
Care to have a look? Some printfs of the addresses would be enough to
give me a clue.

Sascha


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