What is [aiod1], [aiod2], [aiod3], and [aiod4]?

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Anonymous

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Yesterday, I found in the mid of the list generated by ps -axj 4 entries named [aiod1], [aiod2], [aiod3], and [aiod4], all of them being child processes of /sbin/init --. Using Google, I could not find any satisfactory answer on what [aoidN] is, and what to do about/with it. After restarting the system, they disappeared.

The system is running FreeBSD 8.2-RELEASE (GENERIC_IPSEC) #1, i.e. a derivate of a GENERIC kernel with IPsec enabled.

Many thanks in advance for any reply.

Best regards

Rolf
 
aio(4)

The aio facility provides system calls for asynchronous I/O. It is
available both as a kernel option for static inclusion and as a dynamic
kernel module.
Click to expand...

By the way, the brackets [] entry inside ps output are kernel threads.
 
SirDice and Zare, thank you very much for your response.

What could have triggered the start of 4 kernel aio-daemons in the mid of the day, i.e. long time after the last reboot? For what pupose? I never saw this before.
 
Torfinn, thank you very much for your reply. This brought me to checking Samba, and indeed, it created the 4 [aiodN] kernel processes, once I connected to a share.

Best regards

Rolf
 
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