Brian Behlendorf ede0bdffb6 Treat mutex->owner as volatile ... When HAVE_MUTEX_OWNER is defined and we are directly accessing mutex->owner treat is as volative with the ACCESS_ONCE() helper. Without this you may get a stale cached value when accessing it from different cpus. This can result in incorrect behavior from mutex_owned() and mutex_owner(). This is not a problem for the !HAVE_MUTEX_OWNER case because in this case all the accesses are covered by a spin lock which similarly gaurentees we will not be accessing stale data. Secondly, check CONFIG_SMP before allowing access to mutex->owner. I see that for non-SMP setups the kernel does not track the owner so we cannot rely on it. Thirdly, check CONFIG_MUTEX_DEBUG when this is defined and the HAVE_MUTEX_OWNER is defined surprisingly the mutex->owner will not be cleared on mutex_exit(). When this is the case the SPL needs to make sure to do it to ensure MUTEX_HELD() behaves as expected or you will certainly assert in mutex_destroy(). Finally, improve the mutex regression tests. For mutex_owned() we now minimally check that it behaves correctly when checked from the owner thread or the non-owner thread. This subtle behaviour has bit me before and I'd like to catch it early next time if it reappears. As for mutex_owned() regression test additonally verify that mutex->owner is always cleared on mutex_exit().		2010-06-28 16:02:57 -07:00
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fm	Public Release Prep	2010-05-17 15:18:00 -07:00
fs	Public Release Prep	2010-05-17 15:18:00 -07:00
sysevent	Public Release Prep	2010-05-17 15:18:00 -07:00
acl_impl.h	Public Release Prep	2010-05-17 15:18:00 -07:00
acl.h	Public Release Prep	2010-05-17 15:18:00 -07:00
atomic.h	Public Release Prep	2010-05-17 15:18:00 -07:00
attr.h	Public Release Prep	2010-05-17 15:18:00 -07:00
bitmap.h	Public Release Prep	2010-05-17 15:18:00 -07:00
bootconf.h	Public Release Prep	2010-05-17 15:18:00 -07:00
bootprops.h	Stub out additional missing headers	2010-06-11 15:57:25 -07:00
buf.h	Public Release Prep	2010-05-17 15:18:00 -07:00
byteorder.h	Public Release Prep	2010-05-17 15:18:00 -07:00
callb.h	Public Release Prep	2010-05-17 15:18:00 -07:00
cmn_err.h	Public Release Prep	2010-05-17 15:18:00 -07:00
compress.h	Public Release Prep	2010-05-17 15:18:00 -07:00
condvar.h	Public Release Prep	2010-05-17 15:18:00 -07:00
conf.h	Public Release Prep	2010-05-17 15:18:00 -07:00
console.h	Public Release Prep	2010-05-17 15:18:00 -07:00
cpupart.h	Stub out additional missing headers	2010-06-11 15:57:25 -07:00
cpuvar.h	Public Release Prep	2010-05-17 15:18:00 -07:00
crc32.h	Public Release Prep	2010-05-17 15:18:00 -07:00
cred.h	Public Release Prep	2010-05-17 15:18:00 -07:00
ctype.h	Public Release Prep	2010-05-17 15:18:00 -07:00
ddi.h	Public Release Prep	2010-05-17 15:18:00 -07:00
debug.h	Public Release Prep	2010-05-17 15:18:00 -07:00
dirent.h	Public Release Prep	2010-05-17 15:18:00 -07:00
disp.h	Public Release Prep	2010-05-17 15:18:00 -07:00
dkio.h	Public Release Prep	2010-05-17 15:18:00 -07:00
dklabel.h	Public Release Prep	2010-05-17 15:18:00 -07:00
dnlc.h	Public Release Prep	2010-05-17 15:18:00 -07:00
dumphdr.h	Public Release Prep	2010-05-17 15:18:00 -07:00
efi_partition.h	Public Release Prep	2010-05-17 15:18:00 -07:00
errno.h	Public Release Prep	2010-05-17 15:18:00 -07:00
file.h	Public Release Prep	2010-05-17 15:18:00 -07:00
int_limits.h	Public Release Prep	2010-05-17 15:18:00 -07:00
int_types.h	Public Release Prep	2010-05-17 15:18:00 -07:00
inttypes.h	Public Release Prep	2010-05-17 15:18:00 -07:00
isa_defs.h	Public Release Prep	2010-05-17 15:18:00 -07:00
kidmap.h	Public Release Prep	2010-05-17 15:18:00 -07:00
kmem.h	Add kmem_vasprintf function	2010-06-24 09:41:59 -07:00
kobj.h	Public Release Prep	2010-05-17 15:18:00 -07:00
kstat.h	Cleanly split Linux proc.h (fs) from conflicting Solaris proc.h (process)	2010-06-11 15:57:25 -07:00
list.h	Public Release Prep	2010-05-17 15:18:00 -07:00
Makefile.in	Build system and packaging (RPM support)	2009-03-09 15:56:55 -07:00
mkdev.h	Public Release Prep	2010-05-17 15:18:00 -07:00
mntent.h	Public Release Prep	2010-05-17 15:18:00 -07:00
modctl.h	Public Release Prep	2010-05-17 15:18:00 -07:00
mode.h	Public Release Prep	2010-05-17 15:18:00 -07:00
mount.h	Public Release Prep	2010-05-17 15:18:00 -07:00
mutex.h	Treat mutex->owner as volatile	2010-06-28 16:02:57 -07:00
note.h	Public Release Prep	2010-05-17 15:18:00 -07:00
open.h	Public Release Prep	2010-05-17 15:18:00 -07:00
param.h	Public Release Prep	2010-05-17 15:18:00 -07:00
pathname.h	Public Release Prep	2010-05-17 15:18:00 -07:00
policy.h	Public Release Prep	2010-05-17 15:18:00 -07:00
pool.h	Stub out additional missing headers	2010-06-11 15:57:25 -07:00
priv_impl.h	Stub out additional missing headers	2010-06-11 15:57:25 -07:00
proc.h	Cleanly split Linux proc.h (fs) from conflicting Solaris proc.h (process)	2010-06-11 15:57:25 -07:00
processor.h	Public Release Prep	2010-05-17 15:18:00 -07:00
pset.h	Stub out additional missing headers	2010-06-11 15:57:25 -07:00
random.h	Public Release Prep	2010-05-17 15:18:00 -07:00
refstr.h	Public Release Prep	2010-05-17 15:18:00 -07:00
resource.h	Public Release Prep	2010-05-17 15:18:00 -07:00
rwlock.h	Simplify rwlock implementation.	2010-05-20 14:20:34 -07:00
sdt.h	Public Release Prep	2010-05-17 15:18:00 -07:00
sid.h	Minor cleanup and Solaris API additions.	2010-06-11 15:57:25 -07:00
signal.h	Public Release Prep	2010-05-17 15:18:00 -07:00
stat.h	Public Release Prep	2010-05-17 15:18:00 -07:00
stropts.h	Public Release Prep	2010-05-17 15:18:00 -07:00
sunddi.h	Public Release Prep	2010-05-17 15:18:00 -07:00
sunldi.h	Public Release Prep	2010-05-17 15:18:00 -07:00
sysdc.h	Stub out additional missing headers	2010-06-11 15:57:25 -07:00
sysevent.h	Public Release Prep	2010-05-17 15:18:00 -07:00
sysmacros.h	Minor cleanup and Solaris API additions.	2010-06-11 15:57:25 -07:00
systeminfo.h	Public Release Prep	2010-05-17 15:18:00 -07:00
systm.h	Public Release Prep	2010-05-17 15:18:00 -07:00
t_lock.h	Public Release Prep	2010-05-17 15:18:00 -07:00
taskq.h	Accept but ignore TASKQ_DC_BATCH and TQ_FRONT	2010-06-28 11:39:43 -07:00
thread.h	Cleanly split Linux proc.h (fs) from conflicting Solaris proc.h (process)	2010-06-11 15:57:25 -07:00
time.h	Public Release Prep	2010-05-17 15:18:00 -07:00
timer.h	Minor cleanup and Solaris API additions.	2010-06-11 15:57:25 -07:00
types32.h	Public Release Prep	2010-05-17 15:18:00 -07:00
types.h	Minor cleanup and Solaris API additions.	2010-06-11 15:57:25 -07:00
u8_textprep.h	Public Release Prep	2010-05-17 15:18:00 -07:00
uio.h	Add xuio_* structures and typedefs.	2010-06-11 15:57:25 -07:00
unistd.h	Public Release Prep	2010-05-17 15:18:00 -07:00
utsname.h	Public Release Prep	2010-05-17 15:18:00 -07:00
va_list.h	Public Release Prep	2010-05-17 15:18:00 -07:00
varargs.h	Public Release Prep	2010-05-17 15:18:00 -07:00
vfs_opreg.h	Public Release Prep	2010-05-17 15:18:00 -07:00
vfs.h	Public Release Prep	2010-05-17 15:18:00 -07:00
vmsystm.h	Public Release Prep	2010-05-17 15:18:00 -07:00
vnode.h	Public Release Prep	2010-05-17 15:18:00 -07:00
zmod.h	Public Release Prep	2010-05-17 15:18:00 -07:00
zone.h	Public Release Prep	2010-05-17 15:18:00 -07:00