Hi, On Thu, 2024-01-04 at 23:37 +0100, Richard Weinberger wrote: > On Fri, Nov 10, 2023 at 12:03 PM <benja...@sipsolutions.net> wrote: > > > > From: Benjamin Berg <benja...@sipsolutions.net> > > > > The threads allocated inside the kernel have only a single page of > > stack. Unfortunately, the vfprintf function in standard glibc may use > > too much stack-space, overflowing it. > > Another option is giving the helper threads more memory, we don't have > that many. > Did you explore this option already?
I had not really considered that. One thing though is that userspace_tramp calls os_info while working with the stub stack. So that also means setting STUB_DATA_PAGES to 2. But, I suspect we may want to do that anyway eventually to fit the ever increasing mcontext size for all the AVX512 registers and such. As I said, I think that is fine to do. Benjamin
