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freebsd-skq/sys/kern
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rwatson fdcdf27f80 Revise locking strategy used for UNIX domain sockets in order to improve 
concurrency:

- Add per-unpcb mutexes protecting unpcb connection state, fields, etc.

- Replace global UNP mutex with a global UNP rwlock, which will protect the
  UNIX domain socket connection topology, v_socket, and be acquired
  exclusively before acquiring more than per-unpcb at a time in order to
  avoid lock order issues.

In performance measurements involving MySQL, this change has little or no
overhead on UP (+/- 1%), but leads to a significant (5%-30%) improvement in
multi-processor measurements using the sysbench and supersmack benchmarks.

Much testing by:	kris
Approved by:		re (kensmith)
2007-02-26 20:47:52 +00:00
..
bus_if.m o break newbus api: add a new argument of type driver_filter_t to 2007-02-23 12:19:07 +00:00
clock_if.m
cpufreq_if.m
device_if.m
genassym.sh
imgact_aout.c Correct two vm object reference leaks in error cases. 2006-03-16 08:51:59 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c Use FOREACH_PROC_IN_SYSTEM instead of using its unrolled form. 2007-01-17 14:58:53 +00:00
imgact_gzip.c Maintain the lock on the vnode for most of exec_elfN_imgact(). 2005-12-24 04:57:50 +00:00
imgact_shell.c
inflate.c Normalize a significant number of kernel malloc type names: 2005-10-31 15:41:29 +00:00
init_main.c - Remove setrunqueue and replace it with direct calls to sched_add(). 2007-01-23 08:46:51 +00:00
init_sysent.c This commits the remake in kern/ make sysent to get 2006-11-03 18:57:49 +00:00
kern_acct.c Resort copyrights and licenses in kern_acct.c: per UCB letter, 2007-01-08 20:35:13 +00:00
kern_acl.c Re-wrap comments to wider margins now that they have been relocated from 2007-01-12 22:01:03 +00:00
kern_alq.c Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h 2006-10-22 11:52:19 +00:00
kern_clock.c Align the interfaces for the various watchdogs and make the interface 2006-12-15 21:44:49 +00:00
kern_condvar.c Add second sleep queue so that sx and lockmgr can have separate sleep 2006-12-16 06:54:09 +00:00
kern_conf.c Use int instead of u_int for the 'extra' argument to the 2007-02-02 22:27:45 +00:00
kern_context.c
kern_cpu.c - Print message about cpufreq and timecounter TSC 2006-03-03 02:06:04 +00:00
kern_descrip.c Catch up file descriptor printing function in DDB to the addition of kqueues 2007-02-15 10:55:43 +00:00
kern_environment.c Sweep kernel replacing suser(9) calls with priv(9) calls, assigning 2006-11-06 13:42:10 +00:00
kern_event.c Save exit status of an exiting process in kn_data in the knote. 2006-11-20 22:17:50 +00:00
kern_exec.c Sweep kernel replacing suser(9) calls with priv(9) calls, assigning 2006-11-06 13:42:10 +00:00
kern_exit.c Move sigqueue_take() call into proc_reparent(), this fixed bugs where 2006-10-25 06:18:04 +00:00
kern_fork.c Close race conditions between fork() and [sg]etpriority()'s 2007-02-26 03:38:09 +00:00
kern_idle.c - Remove setrunqueue and replace it with direct calls to sched_add(). 2007-01-23 08:46:51 +00:00
kern_intr.c o break newbus api: add a new argument of type driver_filter_t to 2007-02-23 12:19:07 +00:00
kern_jail.c Remove unused PRIV_IPC_EXEC. Renumbers System V IPC privilege. 2007-02-20 00:12:52 +00:00
kern_kse.c - Remove setrunqueue and replace it with direct calls to sched_add(). 2007-01-23 08:46:51 +00:00
kern_kthread.c - Remove setrunqueue and replace it with direct calls to sched_add(). 2007-01-23 08:46:51 +00:00
kern_ktr.c Remove slightly oddly placed suser() call from the KTR/ALQ setup sysctl: 2006-09-09 16:09:01 +00:00
kern_ktrace.c Do not do a vn_close for all references to the ktraced file if we are 2007-02-13 00:20:13 +00:00
kern_linker.c Fix a comment. 2007-02-26 16:36:48 +00:00
kern_lock.c general LOCK_PROFILING cleanup 2007-02-26 08:26:44 +00:00
kern_lockf.c
kern_malloc.c Increase usefulness of "show malloc" by moving from displaying the basic 2006-10-26 10:17:13 +00:00
kern_mbuf.c Fix for problems that occur when all mbuf clusters migrate to the mbuf packet 2007-01-25 01:05:23 +00:00
kern_mib.c mp_ncpus is always (properly) initialized, even on UP kernels, so just use it. 2005-08-21 18:03:31 +00:00
kern_module.c Address a problem I missed in removing Giant from the kernel linker. Not 2006-06-26 18:34:45 +00:00
kern_mtxpool.c
kern_mutex.c general LOCK_PROFILING cleanup 2007-02-26 08:26:44 +00:00
kern_ntptime.c When ntp_gettime() was converted from a sysctl + wrapper to a system 2007-01-12 07:40:30 +00:00
kern_physio.c
kern_pmc.c Fix -Wundef. 2005-12-04 02:12:43 +00:00
kern_poll.c Threading cleanup.. part 2 of several. 2006-12-06 06:34:57 +00:00
kern_priv.c Add a new priv(9) kernel interface for checking the availability of 2006-11-06 13:37:19 +00:00
kern_proc.c Threading cleanup.. part 2 of several. 2006-12-06 06:34:57 +00:00
kern_prot.c Sort copyrights together. 2007-01-08 20:37:02 +00:00
kern_resource.c Close race conditions between fork() and [sg]etpriority()'s 2007-02-26 03:38:09 +00:00
kern_rwlock.c Add rw_wowned() interface to rwlock(9), allowing a kernel thread to 2007-02-26 19:05:13 +00:00
kern_sema.c
kern_shutdown.c Sweep kernel replacing suser(9) calls with priv(9) calls, assigning 2006-11-06 13:42:10 +00:00
kern_sig.c Give which signal caller has attempted to deliver when panicking. 2007-02-09 17:48:28 +00:00
kern_subr.c Removes useless (flags | ) KASSERT. The ^ one that actually 2007-01-16 11:40:55 +00:00
kern_switch.c - Change types for necent runq additions to u_char rather than int. 2007-02-08 01:52:25 +00:00
kern_sx.c general LOCK_PROFILING cleanup 2007-02-26 08:26:44 +00:00
kern_synch.c Add a new kernel sleep function pause(9). pause(9) is for places that 2007-02-23 16:22:09 +00:00
kern_syscalls.c Make system call modules a bit more robust: 2006-08-01 16:32:20 +00:00
kern_sysctl.c Sweep kernel replacing suser(9) calls with priv(9) calls, assigning 2006-11-06 13:42:10 +00:00
kern_tc.c Commit the results of the typo hunt by Darren Pilgrim. 2006-08-04 07:56:35 +00:00
kern_thr.c - Remove setrunqueue and replace it with direct calls to sched_add(). 2007-01-23 08:46:51 +00:00
kern_thread.c Prefer a more traditional spelling of inhibited in comments and panic 2006-12-31 15:56:04 +00:00
kern_time.c - Remove third parameter of itimer_find, the parameter is always zero. 2006-11-28 03:24:34 +00:00
kern_timeout.c Improve ktr(4) logging for callout(9) subsystem. Log all inserts and 2006-10-11 14:57:03 +00:00
kern_umtx.c Add a lwpid field into per-cpu structure, the lwpid represents current 2006-12-20 04:40:39 +00:00
kern_uuid.c Separate functions with a newline. 2006-07-17 21:00:42 +00:00
kern_xxx.c Sweep kernel replacing suser(9) calls with priv(9) calls, assigning 2006-11-06 13:42:10 +00:00
ksched.c Threading cleanup.. part 2 of several. 2006-12-06 06:34:57 +00:00
link_elf_obj.c Linker set support depends on the magic __start_<section> and 2006-11-30 10:50:29 +00:00
link_elf.c Mark the kernel linker file as linked so that it is visible to the various 2007-02-26 16:48:14 +00:00
linker_if.m
Make.tags.inc Makefile changes to reflect moving sys/isofs/cd9660 to sys/fs/cd9660. 2007-02-11 14:01:32 +00:00
Makefile Add support for the generated file systrace_args.c. 2006-08-05 19:25:14 +00:00
makesyscalls.sh Merge posix4/* into normal kernel hierarchy. 2006-11-11 16:26:58 +00:00
md4c.c
md5c.c Fix a panic on sparc64 related to inproper aligment - we cannot assume, 2006-03-30 18:45:50 +00:00
p1003_1b.c Update #includes list. 2006-11-11 16:19:12 +00:00
posix4_mib.c Fix mispatch of includes list; allows my kernel to build successfully. 2006-11-12 03:34:03 +00:00
sched_4bsd.c Move the seting of the idle_mask bits to a place where they 2007-02-02 05:14:22 +00:00
sched_core.c - Remove setrunqueue and replace it with direct calls to sched_add(). 2007-01-23 08:46:51 +00:00
sched_ule.c general LOCK_PROFILING cleanup 2007-02-26 08:26:44 +00:00
serdev_if.m MFp4: Add the ipend() method to the serdev I/F to allow umbrella 2006-04-23 22:12:39 +00:00
subr_acl_posix1e.c Sweep kernel replacing suser(9) calls with priv(9) calls, assigning 2006-11-06 13:42:10 +00:00
subr_autoconf.c Add a mutex to protect the list of interrupt config hooks. We do assume 2006-07-19 18:53:56 +00:00
subr_blist.c
subr_bus.c Use NULL rather than 0 for various pointer constants. 2007-02-26 19:28:18 +00:00
subr_clist.c
subr_clock.c Use utc_offset() where applicable, and hide the internals of it 2006-10-02 18:23:37 +00:00
subr_devstat.c
subr_disk.c Add a new I/O request - BIO_FLUSH, which basically tells providers below to 2006-10-31 21:11:21 +00:00
subr_eventhandler.c
subr_fattime.c Better naming of fattime conversion functions, they do convert to timespec 2006-10-24 10:27:23 +00:00
subr_firmware.c Cleanup and document the implementation of firmware(9) based on 2007-02-15 17:21:31 +00:00
subr_hints.c Use a sleep mutex instead of an sx lock for the kernel environment. This 2006-07-09 21:42:58 +00:00
subr_kdb.c Add a funny sysctl: debug.kdb.trap_code . 2006-06-18 12:27:59 +00:00
subr_kobj.c Increment kobj_lookup_misses on a miss rather than decrementing it. 2005-12-29 18:00:42 +00:00
subr_lock.c general LOCK_PROFILING cleanup 2007-02-26 08:26:44 +00:00
subr_log.c
subr_mbpool.c
subr_mchain.c Change API of mb_copy_t in libmchain so that netsmb can handle 2005-07-29 13:22:37 +00:00
subr_module.c
subr_msgbuf.c
subr_param.c Partially revert revision 1.66, which contained a change that did not 2005-10-14 19:15:10 +00:00
subr_pcpu.c Fix 'show allpcpu' ddb command on non-x86. CPU IDs are in the range 0 .. 2005-11-03 21:06:29 +00:00
subr_power.c General consensus is that it would be even better to run this in a 2005-11-09 16:22:56 +00:00
subr_prf.c Flushing the buffer is conditional on actually using the buffer. Oops. 2006-11-30 07:25:52 +00:00
subr_prof.c Change the addupc_*() functions to use the uintfptr_t type for pc rather 2005-12-16 22:08:32 +00:00
subr_rman.c Fix a case in rman_manage_region() where the resource list would get missorted. 2007-02-23 22:53:56 +00:00
subr_rtc.c Use utc_offset() where applicable, and hide the internals of it 2006-10-02 18:23:37 +00:00
subr_sbuf.c Make sbuf_copyin() return the number of bytes copied on success. 2005-12-23 11:49:53 +00:00
subr_scanf.c
subr_sleepqueue.c Cleaner fix for handling declaration of loop variable under INVARIANTS 2006-12-17 00:14:20 +00:00
subr_smp.c Rename the KDB_STOP_NMI kernel option to STOP_NMI and make it apply to all 2005-10-24 21:04:19 +00:00
subr_stack.c Correct typos 2006-05-28 22:15:28 +00:00
subr_taskqueue.c - Remove setrunqueue and replace it with direct calls to sched_add(). 2007-01-23 08:46:51 +00:00
subr_trap.c Threading cleanup.. part 2 of several. 2006-12-06 06:34:57 +00:00
subr_turnstile.c - Remove setrunqueue and replace it with direct calls to sched_add(). 2007-01-23 08:46:51 +00:00
subr_unit.c
subr_witness.c Remove unnecessary privilege and privilege check for WITNESS sysctl. 2007-02-20 23:49:31 +00:00
sys_generic.c Prevent IOC_IN with zero size argument (this is only supported 2006-10-14 19:01:55 +00:00
sys_pipe.c Use pipe_direct_write() optimization only if the data is in process' memory. 2006-12-19 12:52:22 +00:00
sys_process.c Make KSE a kernel option, turned on by default in all GENERIC 2006-10-26 21:42:22 +00:00
sys_socket.c Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h 2006-10-22 11:52:19 +00:00
syscalls.c This commits the remake in kern/ make sysent to get 2006-11-03 18:57:49 +00:00
syscalls.master Ok, here it is, we finally add SCTP to current. Note that this 2006-11-03 15:23:16 +00:00
systrace_args.c Ok, here it is, we finally add SCTP to current. Note that this 2006-11-03 15:23:16 +00:00
sysv_ipc.c Sync up PRIV_IPC_{ADMIN,READ,WRITE} priv checks in ipcperm() with 2007-02-20 00:06:59 +00:00
sysv_msg.c Do allow privilege to create over-sized messages on System V IPC 2007-02-19 13:23:45 +00:00
sysv_sem.c Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h 2006-10-22 11:52:19 +00:00
sysv_shm.c Remove call to ipcperm() in shmget_existing(). The flags argument is 2007-02-19 22:56:10 +00:00
tty_compat.c Move the old BSD4.3 tty compatibility from (!BURN_BRIDGES && COMPAT_43) 2006-01-10 09:19:10 +00:00
tty_conf.c
tty_cons.c Sweep kernel replacing suser(9) calls with priv(9) calls, assigning 2006-11-06 13:42:10 +00:00
tty_pts.c Canonicalize copyrights in some files I hold copyrights on: 2007-01-08 17:49:59 +00:00
tty_pty.c Sweep kernel replacing suser(9) calls with priv(9) calls, assigning 2006-11-06 13:42:10 +00:00
tty_subr.c
tty_tty.c Use ctty instead of just returning. ctty just has a simple open that 2006-09-27 16:41:15 +00:00
tty.c Back out rev. 1.266. The real cause for the recent panics has been fixed 2006-12-20 02:49:59 +00:00
uipc_accf.c
uipc_cow.c Previously, nothing prevented the page that was returned by pmap_extract() 2005-10-23 07:41:56 +00:00
uipc_debug.c Teach DDB how to print sockets, socket buffers, protosw's, and domain 2007-02-15 01:28:22 +00:00
uipc_domain.c soreceive_generic(), and sopoll_generic(). Add new functions sosend(), 2006-07-24 15:20:08 +00:00
uipc_mbuf2.c Complete break-out of sys/sys/mac.h into sys/security/mac/mac_framework.h 2006-10-22 11:52:19 +00:00
uipc_mbuf.c Unbreak writes of 0 bytes. Zero byte writes happen when only ancillary 2007-01-22 14:50:28 +00:00
uipc_mqueue.c Merge posix4/* into normal kernel hierarchy. 2006-11-11 16:26:58 +00:00
uipc_sem.c Merge posix4/* into normal kernel hierarchy. 2006-11-11 16:26:58 +00:00
uipc_sockbuf.c Use sysctl_handle_long() instead of duplicating it's logic for 2006-09-06 21:59:36 +00:00
uipc_socket2.c Change two XXX's to two notes: the fact that SOCK_LOCK(so) == 2006-08-02 16:23:52 +00:00
uipc_socket.c Don't block on the socket zone limit during the socket() 2007-02-26 10:45:21 +00:00
uipc_syscalls.c Fixes the MSG_PEEK for sctp_generic_recvmsg() the msg_flags 2007-01-24 12:59:56 +00:00
uipc_usrreq.c Revise locking strategy used for UNIX domain sockets in order to improve 2007-02-26 20:47:52 +00:00
vfs_acl.c Re-wrap comments to wider margins now that they have been relocated from 2007-01-12 22:01:03 +00:00
vfs_aio.c Merge posix4/* into normal kernel hierarchy. 2006-11-11 16:26:58 +00:00
vfs_bio.c Use LIST_EMPTY() instead of unrolled version (LIST_FIRST() [!=]= NULL) 2007-02-22 14:52:59 +00:00
vfs_cache.c Axe Giant from vn_fullpath(9). The vnode -> pathname lookup should be 2006-06-16 05:09:28 +00:00
vfs_cluster.c Replace PG_BUSY with VPO_BUSY. In other words, changes to the page's 2006-10-22 04:28:14 +00:00
vfs_default.c Remove VFS_VPTOFH entirely. API is already broken and it is good time to 2007-02-16 17:32:41 +00:00
vfs_export.c Move vnode-to-file-handle translation from vfs_vptofh to vop_vptofh method. 2007-02-15 22:08:35 +00:00
vfs_extattr.c Update comments to reflect changes in the extattrctl() code. 2006-12-23 00:30:03 +00:00
vfs_hash.c In vfs_hash_get(): mount point should never be changed 2006-04-18 08:05:08 +00:00
vfs_init.c Remove VFS_VPTOFH entirely. API is already broken and it is good time to 2007-02-16 17:32:41 +00:00
vfs_lookup.c If both ISDOTDOT and NOCROSSMOUNT are set then lookup() might breaks out 2007-02-15 09:53:49 +00:00
vfs_mount.c Make vfs_getopts() set *error to ENOENT if the option wasn't found, so that 2007-02-13 01:28:48 +00:00
vfs_subr.c change vop_lock handling to allowing tracking of callers' file and line for 2006-11-13 05:51:22 +00:00
vfs_syscalls.c Remove union_dircheckp hook, it is not needed by new unionfs code anymore. 2007-02-19 10:56:09 +00:00
vfs_vnops.c Add a VNASSERT to vn_close to detect if v_writecount is going 2007-02-12 22:53:01 +00:00
vnode_if.src Move vnode-to-file-handle translation from vfs_vptofh to vop_vptofh method. 2007-02-15 22:08:35 +00:00