Re: [Qemu-devel] Regression with commit 095497ffc66b7f031

[Paolo Bonzini]

On 15/07/2016 10:47, Juergen Gross wrote:
> Nothing scaring and no real difference between working and not working
> variant.
> 
> Meanwhile I've been digging a little bit deeper and found the reason:
> libxenstore is setting up a reader thread which is waiting for the
> watch to fire. With above commit the stack size of that thread (16kB)
> is too small. Setting it to 32kB made qemu work again.

This makes very little sense (not your fault)...  The commit doesn't
change stack usage at all, TLS should not be on the stack.

Can you capture a backtrace where the 16K stack is exceeded?  Perhaps
it's only due to inlining decision on the compiler, in which case
Peter's patch from today is only a bandaid.

Thanks,

Paolo