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f58040c0fc8bc6490fcc75db7fc3e709dfc3c656
mirror_zfs/include/sys
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Chunwei Chen f58040c0fc Implement a proper rw_tryupgrade 
Current rw_tryupgrade does rw_exit and then rw_tryenter(RW_RWITER), and then
does rw_enter(RW_READER) if it fails. This violate the assumption that
rw_tryupgrade should be atomic and could cause extra contention or even lock
inversion.

This patch we implement a proper rw_tryupgrade. For rwsem-spinlock, we take
the spinlock to check rwsem->count and rwsem->wait_list. For normal rwsem, we
use cmpxchg on rwsem->count to change the value from single reader to single
writer.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes zfsonlinux/zfs#4692
Closes #554
2016-05-31 11:44:15 -07:00
..
fm
Kernel header installation should respect --prefix
2014-10-28 09:31:48 -07:00
fs
Kernel header installation should respect --prefix
2014-10-28 09:31:48 -07:00
sysevent
Kernel header installation should respect --prefix
2014-10-28 09:31:48 -07:00
acl_impl.h
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2013-03-04 19:09:34 -08:00
acl.h
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2013-03-04 19:09:34 -08:00
atomic.h
Remove atomic64_xchg() wrappers
2014-10-17 15:11:50 -07:00
attr.h
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2013-03-04 19:09:34 -08:00
bitmap.h
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bootconf.h
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bootprops.h
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2013-03-04 19:09:34 -08:00
buf.h
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2013-03-04 19:09:34 -08:00
byteorder.h
Changes to support zfs encryption
2016-02-25 11:42:46 -08:00
callb.h
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2013-03-04 19:09:34 -08:00
callo.h
Emulate illumos interface cv_timedwait_hires()
2013-11-04 09:49:24 -08:00
cmn_err.h
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2013-03-04 19:09:34 -08:00
compress.h
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2013-03-04 19:09:34 -08:00
condvar.h
Add cv_timedwait_sig_hires to allow interruptible sleep
2016-05-12 14:54:15 -07:00
conf.h
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2013-03-04 19:09:34 -08:00
console.h
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cpupart.h
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cpuvar.h
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crc32.h
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2013-03-04 19:09:34 -08:00
cred.h
Remove credential configure checks.
2014-10-17 15:11:51 -07:00
ctype.h
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ddi.h
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debug.h
Add IMPLY() and EQUIV() macros
2015-06-24 14:44:47 -07:00
dirent.h
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2013-03-04 19:09:34 -08:00
disp.h
Add kpreempt() compatibility macro
2013-10-09 13:52:55 -07:00
dkio.h
Additional dkio support for TRIM/Discard
2015-12-02 13:44:35 -08:00
dkioc_free_util.h
Use vmem_free() in dfl_free() and add dfl_alloc()
2016-04-26 11:20:14 -07:00
dklabel.h
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2013-03-04 19:09:34 -08:00
dnlc.h
Remove shrink_{i,d}node_cache() wrappers
2014-10-17 15:11:51 -07:00
dumphdr.h
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2013-03-04 19:09:34 -08:00
efi_partition.h
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errno.h
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extdirent.h
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fcntl.h
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file.h
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idmap.h
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int_limits.h
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int_types.h
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inttypes.h
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isa_defs.h
Add isa_defs for MIPS
2016-05-31 09:05:56 -07:00
kidmap.h
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2013-03-04 19:09:34 -08:00
kmem_cache.h
Fix CPU hotplug
2015-10-13 09:50:40 -07:00
kmem.h
Turn on both PF_FSTRANS and PF_MEMALLOC_NOIO in spl_fstrans_mark
2016-01-20 11:38:31 -08:00
kobj.h
kobj_read_file: Return -1 on vn_rdwr() error
2016-01-23 10:10:44 -08:00
kstat.h
3537 add kstat_waitq_enter and friends
2013-10-25 13:41:52 -07:00
list.h
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2013-03-04 19:09:34 -08:00
Makefile.am
Additional dkio support for TRIM/Discard
2015-12-02 13:44:35 -08:00
mkdev.h
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mntent.h
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modctl.h
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mode.h
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mount.h
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2013-03-04 19:09:34 -08:00
mutex.h
Use kernel provided mutex owner
2016-04-25 17:04:07 -07:00
note.h
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open.h
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param.h
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pathname.h
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policy.h
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pool.h
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priv_impl.h
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proc.h
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processor.h
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pset.h
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random.h
random_get_pseudo_bytes() need not provide cryptographic strength entropy
2016-02-17 09:49:09 -08:00
refstr.h
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2013-03-04 19:09:34 -08:00
resource.h
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2013-03-04 19:09:34 -08:00
rwlock.h
Implement a proper rw_tryupgrade
2016-05-31 11:44:15 -07:00
sdt.h
Define SET_ERROR()
2013-10-09 14:20:46 -07:00
sid.h
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signal.h
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stat.h
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stropts.h
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2013-03-04 19:09:34 -08:00
sunddi.h
Update code to use misc_register()/misc_deregister()
2014-10-17 15:07:28 -07:00
sunldi.h
Changes to support zfs encryption
2016-02-25 11:42:46 -08:00
sysdc.h
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2013-03-04 19:09:34 -08:00
sysevent.h
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2013-03-04 19:09:34 -08:00
sysmacros.h
sysmacros: Make P2ROUNDUP not trigger int overflow
2015-11-13 15:21:52 -08:00
systeminfo.h
Simplify hostid logic
2014-04-14 09:04:41 -07:00
systm.h
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t_lock.h
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taskq.h
Allow kicking a taskq to spawn more threads
2016-02-05 14:08:31 -08:00
thread.h
De-inline spl_kthread_create().
2014-04-09 19:17:12 -07:00
time.h
Add a macro to convert seconds to nanoseconds and vice-versa
2016-05-05 16:10:46 -07:00
timer.h
Add ddi_time_after and friends
2014-04-14 09:32:01 -07:00
tsd.h
Use tsd to store tq for taskq_member
2016-01-20 13:07:45 -08:00
types32.h
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2013-03-04 19:09:34 -08:00
types.h
Linux 4.5 compat: pfn_t typedef
2016-01-20 11:39:18 -08:00
u8_textprep.h
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2013-03-04 19:09:34 -08:00
uio.h
Restructure uio to accommodate bio_vec
2015-08-24 10:10:21 -07:00
unistd.h
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user.h
Fix race between getf() and areleasef()
2015-12-03 15:44:47 -08:00
va_list.h
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varargs.h
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vfs_opreg.h
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vfs.h
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vmem.h
Use spl_fstrans_mark instead of memalloc_noio_save
2015-12-18 13:24:52 -08:00
vmsystm.h
Include other sources of freeable memory in the freemem calculation
2015-08-19 09:25:30 -07:00
vnode.h
Implement areleasef()
2015-04-24 13:02:37 -07:00
zmod.h
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2013-03-04 19:09:34 -08:00
zone.h
Add crgetzoneid() stub
2015-04-02 09:49:55 -07:00