Hi, all.
I've developed linux driver for AT91SAM9g20-EK based system.
I've accessed external memory with pointer that ioremap() returns, but following message was shown and failed to get pointer.

vmap allocation for size XXXXXXXX failed: use vmalloc=<size> to increase
size.

I increased VMALLOC_END in /arc/arm/mach-at91/include/mach/vmalloc.h and rebuild kernel, and kernel didn't boot...

How do I increase vmalloc size?

Isn't vmalloc=xxx a kernel boot parameter, try setting it in the uboot environment to pass into the kernel.

Thank you for kindly advice!

I have added "vmalloc=xx" to bootargs parameter in u-boot environment , but unfortunately the issue has not fixed yet.

I have increased vmalloc size to 10G, but VmallocTotal size , cat /proc/meminfo shows, didn't increase.

This procedure is not correct ?

>>I have increased vmalloc size to 10G, but VmallocTotal size , cat /proc/meminfo shows, didn't increase.

10GB, just how big is the ioremap() supposed to be?

I agree that 10G is too big size.
I tried to set 1G, 2G before 10G, but the issue had not fixed.
So, as a trial, I set 10G.

Could you show me how to get maximum settable size of vmalloc?
The size depends on memory size?　(i.e. SAM9g20-EK has 64MB SDRAM)