Provided by: manpages_6.9.1-1_all 

NAME
/proc/pid/wchan - wait channel
DESCRIPTION
/proc/pid/wchan (since Linux 2.6.0) The symbolic name corresponding to the location in the kernel where the process is sleeping. Permission to access this file is governed by a ptrace access mode PTRACE_MODE_READ_FSCREDS check; see ptrace(2).
SEE ALSO
proc(5) Linux man-pages 6.9.1 2024-05-02 proc_pid_wchan(5)