Search notes:

/sys/kernel/debug

/sys/kernel/debug is the directory on which debugfs is typically mounted.
The purpose of this file system is to make information available to user space.
It differs from /proc in that /proc makes process related information information available.
It also differs from the sysfs file system (/sys) because sysfs allows one value per file only and /sys/kernel/debug explicitely does not state any rule on the format of its files.

See also

/sys/kernel, /sys/kernel/tracing
ftrace

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/fh...', 1738290289, '18.191.171.86', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/fhs/sys/kernel/debug/index(48): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78