VAC Conflict - What Is It, What Can It Effect

(Doc ID 1008355.1)

Last updated on JULY 29, 2016

Applies to:

Solaris Operating System - Version 8 6/00 U1 and later
All Platforms


"VAC conflict" or "Virtual Address Cache conflict" is a situation that can happen when a page of memory is explicitly mapped by a program to a virtual address that conflicts with the virtual addresses of other mappings to the same
page of memory. The situation causes the Solaris[TM] operating system to have to work very hard to avoid data corruption. Visible symptoms are many CPU xcalls, mutex contention on an anon_array mutex, slow memory accesses
 to that page.


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