Messages in this thread | | | Subject | Re: SELinux performance issue with large systems (32 cpus) | From | Stephen Smalley <> | Date | Tue, 23 Nov 2004 15:54:12 -0500 |
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On Tue, 2004-11-23 at 14:22, keith wrote: > After some lock profiling (keeping track of what locks were last used > and how many cycles were spent waiting) it became quite clean the the > avc_lock was to blame. The avc_lock is a SELinux lock.
Thanks to work by Kaigai Kohei of NEC, the global avc spinlock has been replaced by an RCU-based scheme. Those changes are in the -mm patches (e.g. 2.6.10-rc2-mm3) and will hopefully go upstream after 2.6.10 is released. There is also ongoing work on baseline performance.
-- Stephen Smalley <sds@epoch.ncsc.mil> National Security Agency
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