Hi all,
I have a design question regarding implementation of procfs.
Whenever we look into /proc, it is very likely that its contents
change(directory names with PIDs), since processes are created and die. So
everytime it is better to fetch this information whenever a contents are
looked in this directory. But how to manage the old nodes?
1. Is it better to free all those nodes as soon as they are displayed and
create them whenever they are required?
2. Or create nodes for each of these PIDs and keep them, when updating the
nodes when client looks at /proc replace only the name and information of
the nodes which no longer exists(corresponding to a process that died), with
new process information and also create new nodes if the number of process
currently running only when it exceeds its previous number?
3. Whenever client looks into /proc create nodes for directories and give
the required information. When /proc is looked for second time, free all the
previous nodes and create nodes?
Which among the above is a better approach than the other. Please suggest
me.
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Thanks and regards,
Madhusudan.C.S
Blogs at: www.madhusudancs.info
