> >>Even without getting into just how ugly this is, is it really worthSorry, it's my fault. Surely, CONFIG_DEBUG_PAGEALLOC.
> it is impossible to run debug kernels w/o this patch :/
> or are you asking whether this optimization worth it?
> > What makes me worry is that this is a sign that vendors
> don't even bother to run debug kernels :((((
Fedora rawhide is nearly always shipping with DEBUG_SLAB enabled,
and we didn't hit this once. Are you sure this is a problem
with DEBUG_SLAB, and not DEBUG_PAGEALLOC ?