Messages in this thread | | | Date | Tue, 21 Mar 2000 08:37:24 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: Some questions about linux kernel. |
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On Mon, 20 Mar 2000, David Whysong wrote:
> On Mon, 20 Mar 2000, Richard B. Johnson wrote: > > >The only solution to an out-of-memory condition is to never run > >out of memory. > > Yes! > > >The place where all of the system information is known is in "user > >space". The kernel readily "knows" stuff about the current process, but > >retrieving information about other tasks in a page-fault handler would > >result in an extremely poor performing machine. A user-space daemon can > >acquire information about all the tasks, can detect runaway tasks, can > >safeguard special tasks like Web Servers that haven't gone crazy, and > >can watch for performance hurting rogue programs. > > > >Such a program, if properly designed, is the solution to such > >out-of-memory conditions. > > No! Or perhaps it depends on what you want this user-space daemon to do. >
It is yes. The purpose of the daemon is to monitor the system and prevent an out of memory condition from existing. The kernel should never kill anything (unless asked). Killing a task is policy. It is specified by the administrator and administered by the daemon.
Cheers, Dick Johnson
Penguin : Linux version 2.3.41 on an i686 machine (800.63 BogoMips).
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