Re: [uml-user] UML hang on COW and devfs

[<ta...@cr...>]

Jeff Dike wrote:
>> Kernel virtual memory size shrunk to 32505856 bytes=20
>> Failed to vmalloc COW bitmap, size =3D 6399856=20
> I realize that 6M is less than 32M, but you might try reducing your phy=
sical
> memory size to free up some address space for vmalloc.

Well, I think I didn't test the COW use after compiling with -O1,
but it seemed to fix the issue. However, it still hangs after mounting
devfs.

The amount of memory given to UML didn't seem to have any effect on
the problem. I also tried setting /proc/sys/kernel/exec-shield and=20
exec-shield-randomize to 0, but it didn't help.

Could my SKAS patch have something to do with this? I merged some
of it by hand as it doesn't apply directly over the RHEL kernel
(I can contribute the patch if it indeed works properly). Maybe
I made an error somewhere in the merge process.

I think I'll try an older guest kernel.

--=20
   Taneli Lepp=E4         | Crasman Co Ltd
   <ta...@cr...>  | <http://www.crasman.fi/>