armv7m7-imxrt117x: touch failure return EIO and VM pool exhaustion

[mateusz-bloch]

Trying to enable test execution in the new psh on this target, in relation to the resolution provided in issue #866 . I encountered a failure when using ls in the test touch. The command touch returns success, but the ls print that the directory does not seem to exist when attempting to list it. Additionally, a error message vm: Entry pool exhausted! appears.

  (psh)% touch test_touch_dir/slash_file/
  (psh)% echo $?
  0
  (psh)% date +%Y:%m:%d:%H:%M:%S
  1970:01:01:00:00:03
  (psh)% ls -la test_touch_dir
  ls: can't access test_touch_dir: no such file or directory
  (psh)% exit
  (psh)% dmesg -E
  vm: Entry pool exhausted!
  (psh)% vm: Entry pool exhausted!

Currently, also with touch command in touch test:

  (psh)% mkdir /test_touch_dir/multi_arg9
  (psh)% echo $?
  0
  (psh)% touch /test_touch_dir/multi_arg9/K2C?i#8M /test_touch_dir/multi_arg9/+y?@ /test_touch_dir/multi_arg9/BUAX?
  psh: failed to touch /test_touch_dir/multi_arg9/+y?@: EIO
  psh: failed to touch /test_touch_dir/multi_arg9/BUAX?: EIO
  (psh)% exit
  (psh)% dmesg -E
  vm: Entry pool exhausted!
  vm: Entry pool exhausted!
  (psh)% vm: Entry pool exhausted!
  vm: Entry pool exhausted!

Problems occur after adding changes from :

* phoenix-rtos-kernel 7634e1e...5beec45 (3):
  > NOMMU: Implement message passing between processes of different MPU regions
  > imxrt: Fix hal_exceptionJump and initial stack align
  > armv7m: Enable MPU

Currently seeking an easy way to reproduce the issue with minimal code for a more straightforward investigation