OS sleeps

[�–Ø]

Hello!

The hp server HP-UX9000 which we are using carried out the system failure last week.

When we investigated the log and accessed an inaccurate address ffff0380, HPMC occurred and it is cleared why OS is stopped.

Although it can be coped with the measure patch PHKL_22785 currently which is exhibited by the homepage of hp, we have no idea what timing and the reason CPU has accessed the inaccurate address.

If there are those familiar, please let us know.

[harry d brown jr]

Sometimes the OS sleeps inside of panic while it is flushing dirty buffers to disk. Upon waking up, the scheduler sets a flag which (incorrectly) indicates that the OS is executing in a process context.

As a result of this mistake, the OS later tries to write to a virtual address from real mode.

Resolution:

Reset the flag mentioned above to indicate that the OS is not executing in a process context and avoid the writing to a virtual address in real mode (i.e. the code that would create an HPMC).


Secondly, that patch has been REPLACED by PHKL_26306 .


live free or die
harry

[�–Ø]

thank you.

I knew what you indicated by the homepage.

When does flushing the dirty buffer to a disk by what reason occur?

If it knows, please let me know.