possible bug in 4.1BSD paging algorithms

utzoo!decvax!harpo!eagle!mhuxt!mhuxa!mhuxh!bwkna!haight utzoo!decvax!harpo!eagle!mhuxt!mhuxa!mhuxh!bwkna!haight
Fri Feb 11 08:22:32 AEST 1983

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an 11/750: A 1MB system running a fairly high DZ load and a very high
load of nested shell scripts would
  panic: dup page unlock...
about once a day in an obvious load-dependant way.  After a couple of
weeks we "fixed" it by adding 1MB (thereby eliminating paging).
Anyone else seen this one?

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