I did a little bit of digging, and this vulnerability in the documentation is referred to as:
L1TF = L1 Terminal Fault
Actually I found the kernel documentation directly, a quote:
l1tf= [X86] Control mitigation of the L1TF vulnerability on
The kernel PTE inversion protection is unconditionally
enabled and cannot be ...
The WCHAN value seems to be computed. From kernel sources arch/x86/Kconfig:
Single-depth WCHAN output
Calculate simpler /proc/<PID>/wchan values. If this option
is disabled then wchan values will recurse back to the
caller function. This provides more accurate wchan values,
at the expense of slightly ...