Messages in this thread | | | Date | Sun, 25 Mar 2001 19:00:59 +0200 | From | Jamie Lokier <> | Subject | Re: Larger dev_t |
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Mitchell Blank Jr wrote: > Wichert Akkerman wrote: > > You are just delaying the problem then, at some point your uptime will > > be large enough that you have run through all 64bit pids for example. > > 64 bits is enough to fork 1 million processes per second for over > 500,000 years. I think that's putting the problem off far enough.
The year is 2006. IBM's latest supercluster has 1000 boxes, each with 4 x 8-way SMT processors running at 1THz. Dense optical interconnect provides NUMA-style cache coherency, and the entire system runs like a giant SMP box (using kernel data structure replication). Each active thread is able to clone() 500,000,000 threads per second, in a pid space shared throughout the cluster.
A virus arrives containing while(1){clone();}
Engineers observe pid wraparound approximately 2 weeks later :-)
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