Error after limits.conf file changes

[neo_returned]

Hi everyone

I am working on a posix thread project that use many threads and i am configuring stack size for user to create enough threads

but i want to apply ulimit changes over sessions and i changed /etc/security/limits.conf file for it.

but the problem is after i changed this file, my ubuntu has locked at desktop screen with a dark screen. i can enter f3 level login but desktop does not start.

the line i added is :

neo_returned soft stack 64

is there any wrong here?

[Rubberman]

You have limited your stack size to 64 bytes. Nothing can run that way.

[neo_returned]

You have limited your stack size to 64 bytes. Nothing can run that way.

but after logon , when i write ulimit -s 64 command everything is working ?

[Rubberman]

but after logon , when i write ulimit -s 64 command everything is working ?

That's because ulimit numbers, if not specified, are in 1025 (1K) byte increments, so you are setting the stack size to 64K, which is small, but adequate for a lot of simple programs. It is still too small in my opinion. I think that the size parameters in limits.conf are absolute values, not 1K increment values.