git: kernel - MPSAFE work - fast-path UP tokens when the mplock
commit c843cbf7c4875cfd75067aae571473448a124388
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Tue Jun 8 21:48:22 2010 -0700
kernel - MPSAFE work - fast-path UP tokens when the mplock is already held
* Optimize the case where a UP token is acquired and the MP lock is already
held, greatly reducing the acquisition & release overhead.
When the MP lock is already held we do not have to acquire it again
recursively, which saves us lots of unnecessary calls to get_mplock()
and rel_mplock().
Summary of changes:
sys/kern/lwkt_token.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/c843cbf7c4875cfd75067aae571473448a124388
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