What is the uninterruptible power supply like when it is used

Tags: Uninterruptible Power Supply

Why there is a state called ''TASK_UNINTERRUPTIBLE'' in Linux

Another question is, if we enable PREEMPT then the linux kernel become a preemptive kernel so at any place when we are handling a syscall in the kernel mode, it may be preempted so
Do we need to call set_current_state (TASK

Yes, you must call set_current_state() before calling schedule(), because otherwise the scheduler will not remove the task from the run queue (if you just want to potentially allow other tasks
How to stop ''uninterruptible'' process on Linux?

I have a VirtualBox process hanging around which I tried to kill (KILL/ABORT) but without success. The parent pid is 1 (init). top shows the process as D which is documented as
how to find out what it is waiting for

When looking at the process with "ps ax" the stat column is "Dl" which means "uninterruptible sleep (usually IO)". Is it possible to find out more details on what the process is
understand perfetto Uninterruptible Sleep

Uninterruptible Sleep usually caused by I/O, sometime it''s caused by I/O trashing because of low memory. Only by looking your perfetto trace can figure it out.
Linux Process States

A process performing I/O will be put in D state (uninterruptable sleep), which frees the CPU until there is a hardware interrupt which tells the CPU to return to executing the program. See
Does read/write blocked system call put the process in TASK

The Uninterruptible state is mostly used by device drivers waiting for disk or network I/O. When the process is sleeping uninterruptibly, signals accumulated during the sleep are noticed when
What are use cases of making Java method UnInterruptible

What are other use cases that we might want to use the same pattern of uninterruptible code? Edit: I just realised I linked it to incorrect method. public static boolean
How can I put process into "uninterruptible sleep"?

I''m noticed that process that dumping a core is in uninterruptible sleep, so it can''t be killed with SIGKILL, but when I''m trying to emulate this behavior using pipe commands that receives coredump I can