Subject: CVS commit: [vmlocking] src/sys/kern
To: None <source-changes@NetBSD.org>
From: Andrew Doran <ad@netbsd.org>
List: source-changes
Date: 04/06/2007 12:26:44
Module Name: src
Committed By: ad
Date: Fri Apr 6 12:26:44 UTC 2007
Modified Files:
src/sys/kern [vmlocking]: kern_mutex.c
Log Message:
- Blocking in order to avoid deadlocking against the kernel_lock turns
out to be not so good, since it puts a lot of back pressure onto other
locks. Instead, just drop kernel_lock and re-acquire it when returning
from mutex_vector_exit. In the LOCKDEBUG case, continue to block as it
helps to expose locking bugs.
- Allow NODEBUG mutexes to be spin mutexes, also. To be revisited.
To generate a diff of this commit:
cvs rdiff -r1.11.2.3 -r1.11.2.4 src/sys/kern/kern_mutex.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.