What is incore-inode in file system?
Answers:
It's the "in memory" version of a file system
inode (which resides on the disk).
It contains everything that the on disk version
holds, but *also* has other fields needed at
runtime. For example, the on-disk version doesn't
really need to keep track of which device it came
from -- it's *on* that device. However, once in
memory, it does need to keep track of that. Also,
at runtime, many locks are needed (to protect it
from multiple-update on a multi-processor system).
Take a look at "struct inode" at the reference below.
As the comment says:
Data in icommon is read in
from permanent inode on volume.
which tells you which data is stored in the on-disk
inode. The rest is for the in-core expansion of
that data.
Other answers: