Messages in this thread | | | Date | Mon, 15 Apr 2002 13:38:25 -0700 | From | Andrew Morton <> | Subject | Re: [patch] writeback daemons |
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Pavel Machek wrote: > > Hi! > > > The number of threads is dynamically managed by a simple > > demand-driven algorithm. > > So... when we are low on free memory, we try to create more threads... Possible > deadlock?
Nope. The number of threads is never allowed to fall below two, for this very reason.
If the machine is super-low on memory, attempts to start more threads fail (usually due to the 1-order allocation for the kernel stack). I've seen this happen. But the existing two threads are safe, and that's plenty to get the machine out of trouble.
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