Re: Bootstrapping on a new platform

[Paul Boddie <paul@boddie.org.uk>]

On Tuesday 12. December 2017 17.10.59 Ludovic Courtès wrote:
> Paul Boddie <paul@boddie.org.uk> skribis:
> > 
> > Sorry for the noise, but I guess this is what happens when someone tries
> > to do things the hard way. Thanks for identifying the cause of the
> > problem!
> 
> Great that you found out!

I'll keep you posted about the end result. I managed to encounter a problem 
with User Mode Linux that is known:

do_syscall_stub : ret = -12, offset = 1052680, data = 09b80008
do_syscall_stub: syscall 192 failed, return value = 0xfffffff4, expected 
return value = 0x1cff8000
    syscall parameters: 0x1cff8000 0x1000 0x7 0x11 0x3 0xd464
Failed to flush page for address 0x1cff8000

Apparently, this scary error, which causes the offending process to terminate, 
is the result of an insufficiently large value in /proc/sys/vm/max_map_count. 
Since I don't have huge amounts of memory by modern standards, I'm used to 
occasional problems with UML, and I guess that some of the build tasks are 
quite demanding.

Hopefully, I'll be able to complete the build of GCC 5.4, which is the thing 
that repeatably causes this. Then we'll see what happens.

Thanks once again!

Paul