protection faults (so-called "kernel oops").
If you run into some kind of deadlock, you can try to dump a call trace
-for each process using sysrq-t (see Documentation/sysrq.txt).
+for each process using sysrq-t (see Documentation/admin-guide/sysrq.rst).
This way it is possible to figure where *exactly* some process in "D"
state is stuck.
This is particularly useful for syncing disks unmounting & rebooting
if the machine gets partially hung.
-Read Documentation/sysrq.txt for more info
+Read Documentation/admin-guide/sysrq.rst for more info
References:
===========
- softlockup_all_cpu_backtrace
- soft_watchdog
- stop-a [ SPARC only ]
-- sysrq ==> Documentation/sysrq.txt
+- sysrq ==> Documentation/admin-guide/sysrq.rst
- sysctl_writes_strict
- tainted
- threads-max
This takes one argument, which is a single letter. It calls the
generic kernel's SysRq driver, which does whatever is called for by
- that argument. See the SysRq documentation in Documentation/sysrq.txt
- in your favorite kernel tree to see what letters are valid and what
- they do.
+ that argument. See the SysRq documentation in
+ Documentation/admin-guide/sysrq.rst in your favorite kernel tree to
+ see what letters are valid and what they do.