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[Sohail Khan]

Hello Loom Dev,

Thanks a lot for your great work on Project Loom. I am really excited
about Project Loom.
I had a couple of questions that I felt you could answer and help me.  My
questions are in the context of Linux OS and IO.

   1.  Current implementation of  Java Threads are wrappers around Native
   Threads. In linux, threads are Process sharing Virtual Address Space
   allocated to the parent process. If a Java thread makes a blocking
   system call like Read() on a file descriptor, scheduler adds it to the Wait
   Queue, to be awakened later. When running in virtual threads. blocking it
   could be detrimental to the entire JVM. Is my understanding correct?. If
   it's correct then the only IO allowed from Virtual Thread will be
   non-blocking syscalls, any traditional API that uses blocking under the
   hood will need to be invoked from a non virtual thread.
   2. SInce JVM will be doing scheduling, will Java Compiler add bytecodes
   to the task definition, to indicate the JVM to context switch a new virtual
   thread on the native thread. This would lead the JVM to save all the
   context, call stack in Data Structure and allocate a new executable task to
   the native thread. Is my understanding correct?
   3. Will Java Scheduler Implement TIme Slicing, between competing  CPU
   bound executable tasks or the preferred way of executing them would be to
   use existing ForkJoin Pool. Also in case if Java implements preemptive
   scheduling using time slicing, how will JVM interrupt the process as its
   running in the user space
   4. As of today Netty is one very popular wrapper around Java NIO, that
   relies on Event Loops. Will JVM Internally implement event loops for
   Project Loom, because availability of data on Socket buffers could make a
   task executable again.


I was just trying to understand this topic in detail and seeking your help
to do it. Thanks a lot for the help.
I am not a JDK developer but just someone who has keen passion in
understanding this topic and hopefully someday try contributing back as
well to the community.

Thanks and Regards
Sohail Khan