The problem is that we have
kernel:[22741.852001] Call Trace:
and system freezes.
It happens when we use high I/O operations (copy via NFSv.4)
The system is 11.3 and 2.6.34 x86_64 kernel.
I found that there is a bug of the kernel at high I/O operations when cache filled by 100%.
And it is already fixed in the 11.4.
It’s a pity that we cannot change this system anyhow.
And the question is it possible to provide some specific kernel parameters or some tuning to the system to avoid such situation when the cache filled up and the bug in the kernel crashes the system.
We are not able to change the kernel version due to technical reasons.