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Mikolaj Golub 1c1310eed7 Use cv_broadcast() instead of cv_signal() when waking up threads 
waiting on an empty queue as the queue may have several consumers.

Before the fix the following scenario was possible: 2 threads are
waiting on empty queue, 2 threads are inserting simultaneously. The
first inserting thread detects that the queue is empty and is going to
send the signal, but before it sends the second thread inserts
too. When the first sends the signal only one of the waiting threads
receive it while the other one may wait forever.

The scenario above is is believed to be the cause of the observed
cases, when ggate_recv_thread() was getting stuck on taking free
request, while the free queue was not empty.

Reviewed by:	pjd
Tested by:	Yamagi Burmeister yamagi.org
Approved by:	re (marius)
MFC after:	2 weeks
2013-09-19 20:15:24 +00:00
..
adjkerntz Revert r253748,253749 2013-07-28 18:44:17 +00:00
atm In sbin/atm/atmconfig/diag.c, fix a few warnings about format strings 2011-12-17 00:26:45 +00:00
badsect Add missing static keywords for global variables to tools in sbin/. 2011-11-04 13:36:02 +00:00
bsdlabel It seems that libdisk(3) incorrectly sets d_secperunit value. 2012-04-11 06:35:13 +00:00
camcontrol - Begin sentence on a new line. 2013-09-07 05:44:53 +00:00
ccdconfig Cross-reference gvinum(8) instead of vinum(8). 2013-03-16 22:02:47 +00:00
clri Switch the default WARNS level for sbin/ to 6. 2009-10-19 16:00:24 +00:00
comcontrol A number of places in the source tree still reference cuad.* after 2012-12-08 22:16:36 +00:00
conscontrol Changed "conscontrol unset" to accept an existing virtual 2011-04-18 20:28:07 +00:00
ddb remove duplicate semicolons where possible. 2012-10-22 03:00:37 +00:00
devd Correct the printf format specifier for total_events. 2013-07-08 21:10:30 +00:00
devfs Clarify how "hide" and "unhide" commands work on directories. 2013-07-12 06:03:25 +00:00
dhclient Change the cap_rights_t type from uint64_t to a structure that we can extend 2013-09-05 00:09:56 +00:00
dmesg Move the check whether the clear flag is set. This has 2 advantages 2013-06-11 17:46:32 +00:00
dump Mark non-returning function as such 2012-11-29 05:16:50 +00:00
dumpfs When running the -m option to generate a newfs(8) command suitable for 2013-05-16 20:07:08 +00:00
dumpon Adapt to the fact that minidumps are now on by default. 2013-04-30 07:22:03 +00:00
etherswitchcfg Typo in strtol(3). 2013-08-30 10:01:19 +00:00
fdisk VMware environment is frequent nowadays. Add VMFS id. 2012-04-16 17:30:19 +00:00
fdisk_pc98 Change <sys/diskpc98.h> to not redefine the same symbols that are 2013-08-07 00:00:48 +00:00
ffsinfo Cross-reference gvinum(8) instead of vinum(8). 2013-03-16 22:02:47 +00:00
fsck Make fsck and fsck_msdosfs WARNS=6 clean 2012-10-21 12:01:19 +00:00
fsck_ffs Fix the zeroing loop. I must have been drunk when I wrote this... 2013-08-20 07:19:58 +00:00
fsck_msdosfs Print a newline after the error message. 2012-11-03 09:18:37 +00:00
fsdb Revert 248634 and 248643 (e.g., restoring 248625 and 248639). 2013-03-23 20:00:02 +00:00
fsirand Fix sbin/ build with a 64-bit ino_t. 2012-09-27 23:31:06 +00:00
gbde Add the Clang specific -Wmissing-variable-declarations to WARNS=6. 2013-04-19 19:45:00 +00:00
geom Note NULL encryption method for GELI 2013-08-05 10:38:34 +00:00
ggate Fix warnings found by -Wmising-variable-declarations. 2012-10-19 05:43:38 +00:00
growfs Allow the use of lowercase 'yes' 2013-05-08 18:55:38 +00:00
gvinum Remove reference to vinum(4). The manual page was removed in r248370. 2013-03-16 21:50:06 +00:00
hastctl Make hastctl(1) ('list' command) output a worker pid. 2013-07-01 18:41:07 +00:00
hastd Use cv_broadcast() instead of cv_signal() when waking up threads 2013-09-19 20:15:24 +00:00
ifconfig Fix a typo (s/error/errno/). 2013-07-03 09:50:59 +00:00
init init: Set kernel login class and CPU mask on new processes. 2013-08-13 18:51:26 +00:00
ipf Update ipfilter 4.1.28 --> 5.1.2. 2013-09-06 23:11:19 +00:00
ipfw Remove duplicated parapgraph. 2013-07-24 08:36:29 +00:00
iscontrol Bring in the new iSCSI target and initiator. 2013-09-14 15:29:06 +00:00
kldconfig Raise WARNS for various tools where possible. 2010-01-17 21:56:27 +00:00
kldload Remove contractions. 2013-04-11 18:46:41 +00:00
kldstat In printfile(), exit the process instead of only printing the warning. 2010-11-13 16:49:07 +00:00
kldunload Switch the default WARNS level for sbin/ to 6. 2009-10-19 16:00:24 +00:00
ldconfig Add a comment about why aout support is still here: We need it for 2013-03-19 16:57:04 +00:00
mca Fix a variety of compile errors with gcc48 and clang 2012-05-31 08:22:02 +00:00
md5 Add the Clang specific -Wmissing-variable-declarations to WARNS=6. 2013-04-19 19:45:00 +00:00
mdconfig Resolve fflag with realpath(). 2013-07-31 07:06:58 +00:00
mdmfs Remove trailing whitespace per mdoc lint warning 2012-03-29 05:02:12 +00:00
mknod Fix some more warnings found by clang. 2010-11-22 20:10:48 +00:00
mksnap_ffs Note that a UFS filesystem can have up to 20 active snapshots. 2011-02-15 07:25:54 +00:00
mount Minor mdoc fixes. 2013-07-18 05:46:33 +00:00
mount_cd9660 Update the manual page to reflect reality. With r138509 and r152355, 2013-03-05 23:05:43 +00:00
mount_fusefs Fix warnings found by -Wmising-variable-declarations. 2012-10-19 05:43:38 +00:00
mount_msdosfs GC unused variables. Prefer NULL over 0 for pointers. 2013-03-05 22:41:35 +00:00
mount_nfs Document the "gssname" and "allgssname" mount options added by the 2013-07-09 01:31:36 +00:00
mount_nullfs GC unused variables. Prefer NULL over 0 for pointers. 2013-03-05 22:41:35 +00:00
mount_udf Use build_iovec() to make it less cryptic. This also fixes warnings. 2013-03-06 00:36:33 +00:00
mount_unionfs GC unused variables. Prefer NULL over 0 for pointers. 2013-03-05 22:41:35 +00:00
nandfs mdoc: remove superfluous paragraph macro. 2012-05-17 11:29:22 +00:00
natd remove duplicate semicolons where possible. 2012-10-22 03:00:37 +00:00
newfs Remove contractions. 2013-04-11 18:46:41 +00:00
newfs_msdos newfs_msdos: fix inaccurate comments. 2013-09-07 03:10:12 +00:00
newfs_nandfs Unbreak the build of newfs_nandfs. 2013-04-21 22:36:14 +00:00
nfsiod - Display current settings when run without options. 2009-12-26 08:36:02 +00:00
nos-tun nos-tun(8): make WARNS=3 clean 2010-03-10 18:51:13 +00:00
nvmecontrol Add message when nvd disks are attached and detached. 2013-07-19 21:40:57 +00:00
pfctl - Get rid of #ifdef __FreeBSD__. 2012-09-29 16:42:01 +00:00
pflogd pflogd does not depend on libutil 2013-01-01 18:28:21 +00:00
ping Check the return error of set[ug]id. While this can never fail in the 2012-10-22 03:31:22 +00:00
ping6 Remove EOL whitespace. 2013-05-08 21:04:19 +00:00
quotacheck Fix sbin/ build with a 64-bit ino_t. 2012-09-27 23:31:06 +00:00
rcorder Fix warnings found by -Wmising-variable-declarations. 2012-10-19 05:43:38 +00:00
reboot Add a new gptboot(8) man page. Factor out the redundant information 2013-07-01 22:38:36 +00:00
recoverdisk Fix 'SEE ALSO' list. 2013-07-12 09:20:55 +00:00
resolvconf Add resolvconf(8) which manages resolv.conf. 2011-03-18 12:18:52 +00:00
restore Check the return error of set[e][ug]id. While this can never fail in the 2012-10-22 03:07:05 +00:00
route Fix boundary check of sockaddr array. 2013-08-01 04:50:46 +00:00
routed mdoc sweep 2013-05-13 18:13:50 +00:00
rtsol Add dump.c to the rtsol build. It is needed now that sec2str is non-static 2011-06-08 21:59:07 +00:00
savecore With rotating kernel dumps the higest dump number is not necessarily the 2012-12-16 23:09:27 +00:00
sconfig Switch the default WARNS level for sbin/ to 6. 2009-10-19 16:00:24 +00:00
setkey Correct prefix for "locally installed things" 2013-01-16 05:03:46 +00:00
shutdown Add simple example. 2013-03-19 21:40:14 +00:00
spppcontrol mdoc: order prologue macros consistently by Dd/Dt/Os 2010-04-14 19:08:06 +00:00
sunlabel mdoc: fix column names, indentation, column separation within each row, and 2012-04-07 09:05:30 +00:00
swapon Style clean-ups. 2013-09-05 21:19:16 +00:00
sysctl Use the right format string for line buffer. 2013-01-13 04:28:44 +00:00
tunefs Constify string pointers. 2013-05-16 21:04:56 +00:00
umount Fix memory leak in umount.c 2012-11-15 15:06:21 +00:00
Makefile Remove all legacy ATA code parts, not used since options ATA_CAM enabled in 2013-04-04 07:12:24 +00:00
Makefile.amd64 Integrate nvmecontrol(8) into the amd64 and i386 builds. 2012-09-17 21:41:38 +00:00
Makefile.arm MF tbemd: Move to using Makefile.arch to select what to build. 2010-09-13 02:25:21 +00:00
Makefile.i386 Integrate nvmecontrol(8) into the amd64 and i386 builds. 2012-09-17 21:41:38 +00:00
Makefile.ia64 MF tbemd: Move to using Makefile.arch to select what to build. 2010-09-13 02:25:21 +00:00
Makefile.inc Switch the default WARNS level for sbin/ to 6. 2009-10-19 16:00:24 +00:00
Makefile.mips MF tbemd: Move to using Makefile.arch to select what to build. 2010-09-13 02:25:21 +00:00
Makefile.pc98 MF tbemd: Move to using Makefile.arch to select what to build. 2010-09-13 02:25:21 +00:00
Makefile.sparc64 MF tbemd: Move to using Makefile.arch to select what to build. 2010-09-13 02:25:21 +00:00