CVS commit: src/lib/librumpuser

["Mindaugas Rasiukevicius" <rmind%netbsd.org@localhost>]

Module Name:    src
Committed By:   rmind
Date:           Tue Sep 24 23:45:16 UTC 2013

Modified Files:
        src/lib/librumpuser: rumpuser_pth.c

Log Message:
rumpuser_rwlock: replace internal pthread_spin_lock (for protecting reader
count) with atomic operations.  As pthread_spin_lock is not adaptive lock, it
can have hugely negative impact if contended here, especially with priority
inversions.  Now contended rwlock(9) no longer falls flat in RUMP kernels.


To generate a diff of this commit:
cvs rdiff -u -r1.31 -r1.32 src/lib/librumpuser/rumpuser_pth.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.