PR/60030 CVS commit: src/sys

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

The following reply was made to PR kern/60030; it has been noted by GNATS.

From: "Taylor R Campbell" <riastradh%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/60030 CVS commit: src/sys
Date: Sun, 16 Aug 2026 21:52:42 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Sun Aug 16 21:52:42 UTC 2026
 
 Modified Files:
 	src/sys/external/bsd/drm2/linux: linux_rwsem.c linux_ww_mutex.c
 	src/sys/kern: kern_lock.c kern_mutex.c kern_rwlock.c
 	src/sys/sys: lockdebug.h
 
 Log Message:
 kernel: Track what lock each lwp is waiting for without LOCKDEBUG.
 
 This is reasonably cheap -- one extra pointer on the stack, couple
 extra stores when _waiting_ (spinning or sleeping) for a _contended_
 lock -- and doesn't change the kernel ABI.  Will enable us to get
 diagnostics from crash dumps when, e.g., there's a softint deadlock
 tripping a heartbeat panic.
 
 PR kern/60030: ddb/crash: show all locks without LOCKDEBUG
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.4 -r1.5 src/sys/external/bsd/drm2/linux/linux_rwsem.c
 cvs rdiff -u -r1.16 -r1.17 src/sys/external/bsd/drm2/linux/linux_ww_mutex.c
 cvs rdiff -u -r1.197 -r1.198 src/sys/kern/kern_lock.c
 cvs rdiff -u -r1.112 -r1.113 src/sys/kern/kern_mutex.c
 cvs rdiff -u -r1.76 -r1.77 src/sys/kern/kern_rwlock.c
 cvs rdiff -u -r1.22 -r1.23 src/sys/sys/lockdebug.h
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.