Ed Schouten f3b86a5fd7 Mark most often used sysctl's as MPSAFE. ...

After running a `make buildkernel', I noticed most of the Giant locks in
sysctl are only caused by a very small amount of sysctl's:

- sysctl.name2oid. This one is locked by SYSCTL_LOCK, just like
  sysctl.oidfmt.

- kern.ident, kern.osrelease, kern.version, etc. These are just constant
  strings.

- kern.arandom, used by the stack protector. It is already protected by
  arc4_mtx.

I also saw the following sysctl's show up. Not as often as the ones
above, but still quite often:

- security.jail.jailed. Also mark security.jail.list as MPSAFE. They
  don't need locking or already use allprison_lock.

- kern.devname, used by devname(3), ttyname(3), etc.

This seems to reduce Giant locking inside sysctl by ~75% in my primitive
test setup.

2009-01-28 19:58:05 +00:00

..

bus_if.m

Allow device hints to wire the unit numbers of devices.

2008-11-18 21:01:54 +00:00

clock_if.m

…

cpufreq_if.m

…

device_if.m

…

genassym.sh

…

imgact_aout.c

Add sv_flags field to struct sysentvec with intention to provide description

2008-11-22 12:36:15 +00:00

imgact_elf32.c

…

imgact_elf64.c

…

imgact_elf.c

When a statically linked binary is executed (or at least, one without

2009-01-25 12:07:43 +00:00

imgact_gzip.c

…

imgact_shell.c

Decontextualize the couplet VOP_GETATTR / VOP_SETATTR as the passed thread

2008-08-28 15:23:18 +00:00

inflate.c

…

init_main.c

Rename three MAC entry points from _proc_ to _cred_ to reflect the fact

2008-10-28 11:33:06 +00:00

init_sysent.c

Regenerate system call tables for r184789.

2008-11-09 10:48:06 +00:00

kern_acct.c

Properly lock proctree_lock before locking the process while accounting.

2008-08-21 15:02:17 +00:00

kern_alq.c

Use msleep_spin() instead of unlock/tsleep/lock. This was

2008-07-02 20:44:33 +00:00

kern_clock.c

- Implement generic macros for producing KTR records that are compatible

2009-01-17 07:17:57 +00:00

kern_condvar.c

- Don't do a WITNESS_SAVE() on the interlock if it is Giant in the condition

2008-09-25 13:42:19 +00:00

kern_conf.c

Explicitely note that destroy_dev() sleeps.

2008-11-27 16:47:25 +00:00

kern_cons.c

Reimplement the /dev/console device node.

2008-11-01 08:35:28 +00:00

kern_context.c

…

kern_cpu.c

If possible, try to obtain max_mhz on cpufreq attach instead of first request.

2008-12-16 01:24:05 +00:00

kern_cpuset.c

MFp4:

2008-11-29 14:32:14 +00:00

kern_ctf.c

Add the CTF source file which gets shared with link_elf.c and link_elf_obj.c.

2008-05-23 03:04:27 +00:00

kern_descrip.c

Clear the pointers to the file in the struct filedesc before file is closed

2008-12-30 12:51:56 +00:00

kern_dtrace.c

Remove code that isn't required. It actually breaks the case where KDTRACE_HOOKS

2008-06-16 04:44:29 +00:00

kern_environment.c

Implement the following macros for completeness:

2008-07-21 15:05:25 +00:00

kern_event.c

Fix a number of style issues in the MALLOC / FREE commit. I've tried to

2008-10-23 20:26:15 +00:00

kern_exec.c

Several threads in a process may do vfork() simultaneously. Then, all

2008-12-05 20:50:24 +00:00

kern_exit.c

Several threads in a process may do vfork() simultaneously. Then, all

2008-12-05 20:50:24 +00:00

kern_fork.c

Several threads in a process may do vfork() simultaneously. Then, all

2008-12-05 20:50:24 +00:00

kern_idle.c

…

kern_intr.c

style(9)

2008-09-23 14:25:56 +00:00

kern_jail.c

Mark most often used sysctl's as MPSAFE.

2009-01-28 19:58:05 +00:00

kern_kthread.c

Kill a dead variable

2008-08-03 21:07:19 +00:00

kern_ktr.c

…

kern_ktrace.c

Fix a credential reference leak. [1]

2008-12-03 15:54:35 +00:00

kern_linker.c

Conditionally compile out V_ globals while instantiating the appropriate

2008-12-10 23:12:39 +00:00

kern_lock.c

Teach WITNESS about the interlocks used with lockmgr. This removes a bunch

2008-09-10 19:13:30 +00:00

kern_lockf.c

Remove unused variable.

2008-11-27 04:40:37 +00:00

kern_malloc.c

- Make the keg abstraction more complete. Permit a zone to have multiple

2009-01-25 09:11:24 +00:00

kern_mbuf.c

Temporary workaround for the limitations of the mbuf flowid field: zero

2009-01-01 20:03:01 +00:00

kern_mib.c

Mark most often used sysctl's as MPSAFE.

2009-01-28 19:58:05 +00:00

kern_module.c

When the SYSINIT() to load a module invokes the MOD_LOAD event successfully,

2008-12-05 16:47:30 +00:00

kern_mtxpool.c

Fix a number of style issues in the MALLOC / FREE commit. I've tried to

2008-10-23 20:26:15 +00:00

kern_mutex.c

Teach WITNESS about the interlocks used with lockmgr. This removes a bunch

2008-09-10 19:13:30 +00:00

kern_ntptime.c

…

kern_osd.c

Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes.

2008-11-17 20:49:29 +00:00

kern_physio.c

…

kern_pmc.c

Support sparsely numbered CPUs.

2008-09-22 10:37:02 +00:00

kern_poll.c

Order #includes - also to reduce diffs with vimage branches in p4.

2008-12-11 16:09:31 +00:00

kern_priv.c

Remove the suser(9) interface from the kernel. It has been replaced from

2008-09-17 15:49:44 +00:00

kern_proc.c

- Add conditional Giant locking around the vrele() in

2009-01-23 22:46:45 +00:00

kern_prot.c

The userland_sysctl() function retries sysctl_root() until returned

2008-12-12 12:06:28 +00:00

kern_resource.c

Don't rearm callout if the process is exiting, it may leak a callout

2008-10-24 01:09:24 +00:00

kern_rmlock.c

Teach WITNESS about the interlocks used with lockmgr. This removes a bunch

2008-09-10 19:13:30 +00:00

kern_rwlock.c

add RW_SYSINIT_FLAGS macro and rw_sysinit_flags initialization function

2008-12-08 21:46:55 +00:00

kern_sdt.c

Add kernel support for the Statically Defined Trace provider.

2008-05-18 19:32:36 +00:00

kern_sema.c

…

kern_shutdown.c

It's possible that the dump device has gone away after it was

2008-11-23 21:05:22 +00:00

kern_sig.c

Revert rev 184216 and 184199, due to the way the thread_lock works,

2008-11-05 03:01:23 +00:00

kern_subr.c

Make ureadc() warn when holding any locks, just like uiomove().

2008-08-28 19:34:58 +00:00

kern_switch.c

fix typo in runz_fuzz

2008-05-12 06:42:06 +00:00

kern_sx.c

Teach WITNESS about the interlocks used with lockmgr. This removes a bunch

2008-09-10 19:13:30 +00:00

kern_synch.c

- Implement generic macros for producing KTR records that are compatible

2009-01-17 07:17:57 +00:00

kern_syscalls.c

Various style fixes. 7 space indent is just odd.

2008-09-18 20:10:11 +00:00

kern_sysctl.c

Mark most often used sysctl's as MPSAFE.

2009-01-28 19:58:05 +00:00

kern_tc.c

…

kern_thr.c

Add sv_flags field to struct sysentvec with intention to provide description

2008-11-22 12:36:15 +00:00

kern_thread.c

Update ZFS from version 6 to 13 and bring some FreeBSD-specific changes.

2008-11-17 20:49:29 +00:00

kern_time.c

In realtimer_delete(), clear timer's value and interval to tell

2008-10-20 02:37:53 +00:00

kern_timeout.c

Add explicit static DTrace tracing to the callout mechanism, capturing

2009-01-24 10:22:49 +00:00

kern_umtx.c

Add two commands to _umtx_op system call to allow a simple mutex to be

2008-06-24 07:32:12 +00:00

kern_uuid.c

Rather than using hidden includes (with cicular dependencies),

2008-12-02 21:37:28 +00:00

kern_vimage.c

Conditionally compile out V_ globals while instantiating the appropriate

2008-12-10 23:12:39 +00:00

kern_xxx.c

Fix compilation. Also move ogetkerninfo() to kern_xxx.c.

2008-12-29 19:24:00 +00:00

ksched.c

…

link_elf_obj.c

Calling linker_load_dependencies() while holding the module'

2008-08-03 13:33:45 +00:00

link_elf.c

Calling linker_load_dependencies() while holding the module'

2008-08-03 13:33:45 +00:00

linker_if.m

Add the ctf_get method.

2008-05-23 04:06:49 +00:00

Make.tags.inc

Catch up with the disappearance of sys/dev/hfa.

2008-12-01 14:34:42 +00:00

Makefile

…

makesyscalls.sh

Tidy up a few things with syscall generation:

2008-09-25 20:07:42 +00:00

md4c.c

…

md5c.c

…

p1003_1b.c

…

posix4_mib.c

…

sched_4bsd.c

- Use __XSTRING where I want the define to be expanded. This resulted in

2009-01-25 07:35:10 +00:00

sched_ule.c

- Use __XSTRING where I want the define to be expanded. This resulted in

2009-01-25 07:35:10 +00:00

serdev_if.m

…

stack_protector.c

Fix a chicken-and-egg problem: this files implements SSP support,

2008-06-26 07:52:45 +00:00

subr_acl_posix1e.c

Rename a variable missed in previous accmode_t-related commits.

2008-10-28 21:58:48 +00:00

subr_autoconf.c

If run_interrupt_driven_config_hooks() waits 360 seconds and INVARIANTS

2008-07-21 20:50:49 +00:00

subr_blist.c

Retire the MALLOC and FREE macros. They are an abomination unto style(9).

2008-10-23 15:53:51 +00:00

subr_bufring.c

- bump __FreeBSD version to reflect added buf_ring, memory barriers,

2008-11-22 05:55:56 +00:00

subr_bus.c

Allow device hints to wire the unit numbers of devices.

2008-11-18 21:01:54 +00:00

subr_clist.c

Now that the number of clist consumers have dropped massively, trim down

2008-09-21 18:12:18 +00:00

subr_clock.c

Now that all platforms use genclock, shuffle things around slightly

2008-04-22 19:38:30 +00:00

subr_devstat.c

…

subr_disk.c

…

subr_eventhandler.c

…

subr_fattime.c

…

subr_firmware.c

Avoid scheduling firmware taskqs when cold.

2008-11-11 12:25:08 +00:00

subr_hints.c

…

subr_kdb.c

Expand kdb_alt_break a little, most commonly used with the option

2008-05-04 23:29:38 +00:00

subr_kobj.c

Modularize the Open Firmware client interface to allow run-time switching

2008-12-20 00:33:10 +00:00

subr_lock.c

- track maximum wait time

2008-07-27 21:45:20 +00:00

subr_log.c

…

subr_mbpool.c

…

subr_mchain.c

…

subr_module.c

…

subr_msgbuf.c

…

subr_param.c

Document the relationship between enum VM_GUEST and the vm_guest_sysctl_names

2008-12-30 23:49:54 +00:00

subr_pcpu.c

- Implement generic macros for producing KTR records that are compatible

2009-01-17 07:17:57 +00:00

subr_power.c

…

subr_prf.c

Revert r185891.

2008-12-21 21:54:01 +00:00

subr_prof.c

…

subr_rman.c

Trivially avoid a null pointer dereference when drivers

2008-10-22 18:20:45 +00:00

subr_rtc.c

Now that all platforms use genclock, shuffle things around slightly

2008-04-22 19:38:30 +00:00

subr_sbuf.c

Switch to simplified BSD license (with phk's approval), plus whitespace

2008-08-09 10:26:21 +00:00

subr_scanf.c

…

subr_sleepqueue.c

Revision 184199 had not been fully reverted, add missing piece.

2008-12-01 01:54:55 +00:00

subr_smp.c

Whitespace tweak.

2009-01-26 15:32:39 +00:00

subr_stack.c

Make it possible to compile kernel with KTR but without DDB.

2008-10-30 21:48:28 +00:00

subr_taskqueue.c

revert local change

2008-07-18 07:10:33 +00:00

subr_trap.c

- Bug fix: prevent a thread from migrating between CPUs between the

2008-12-13 13:07:12 +00:00

subr_turnstile.c

Make ddb command registration dynamic so modules can extend

2008-09-15 22:45:14 +00:00

subr_unit.c

…

subr_witness.c

Add functions WITNESS so it can be asserted that the lock is not released for a

2009-01-21 04:19:18 +00:00

sys_generic.c

- bit has to be fd_mask to work properly on 64bit platforms. Constants

2009-01-25 18:38:42 +00:00

sys_pipe.c

Several cleanups related to pipe(2).

2008-11-11 14:55:59 +00:00

sys_process.c

Revert rev 184216 and 184199, due to the way the thread_lock works,

2008-11-05 03:01:23 +00:00

sys_socket.c

Lock receive socket buffer in soo_stat() rather than commenting that we

2008-10-07 07:10:28 +00:00

syscalls.c

Regenerate system call tables for r184789.

2008-11-09 10:48:06 +00:00

syscalls.master

Mark uname(), getdomainname() and setdomainname() with COMPAT_FREEBSD4.

2008-11-09 10:45:13 +00:00

systrace_args.c

Regenerate system call tables for r184789.

2008-11-09 10:48:06 +00:00

sysv_ipc.c

…

sysv_msg.c

…

sysv_sem.c

Lock the semaphore identifier lock during semaphore initialization to

2009-01-15 12:15:46 +00:00

sysv_shm.c

…

tty_compat.c

Fix an awful bug inside our COMPAT_43TTY code.

2008-09-04 16:30:53 +00:00

tty_info.c

Integrate the new MPSAFE TTY layer to the FreeBSD operating system.

2008-08-20 08:31:58 +00:00

tty_inq.c

Fix some edge cases in the TTY queues:

2008-08-30 09:18:27 +00:00

tty_outq.c

Fix some edge cases in the TTY queues:

2008-08-30 09:18:27 +00:00

tty_pts.c

Set PTS_FINISHED before waking up any threads.

2008-12-21 21:16:57 +00:00

tty_pty.c

Remove unneeded use of device unit numbers from pty(4).

2009-01-25 08:27:11 +00:00

tty_tty.c

Remove unneeded Giant locking of /dev/tty.

2008-06-03 12:38:00 +00:00

tty_ttydisc.c

Don't forget to relock the TTY after uiomove() returns an error.

2008-11-12 09:04:44 +00:00

tty.c

Use the proper flag to let kern.ttys be executed without Giant.

2009-01-26 16:43:18 +00:00

uipc_accf.c

Retire the MALLOC and FREE macros. They are an abomination unto style(9).

2008-10-23 15:53:51 +00:00

uipc_cow.c

Extend the struct vm_page wire_count to u_int to avoid the overflow

2009-01-03 13:24:08 +00:00

uipc_debug.c

Remove two further uses (debugging and NULLing) of pr_ousrreq, missed due

2009-01-04 19:16:36 +00:00

uipc_domain.c

Remove Giant locking from domains list.

2009-01-04 19:22:53 +00:00

uipc_mbuf2.c

…

uipc_mbuf.c

Teach m_copyback() to use trailing space of the last mbuf in chain.

2009-01-18 20:19:55 +00:00

uipc_mqueue.c

Fix matching of message queues by name.

2008-11-28 14:53:18 +00:00

uipc_sem.c

Rework the lifetime management of the kernel implementation of POSIX

2008-06-27 05:39:04 +00:00

uipc_shm.c

Shared memory objects that have size which is not necessarily equal to

2008-12-01 22:33:50 +00:00

uipc_sockbuf.c

Rewrite sbreserve_locked()'s comment on NULL thread pointers, eliminating

2008-10-07 09:51:39 +00:00

uipc_socket.c

Make sure nmbclusters are initialized before maxsockets

2008-12-10 22:17:09 +00:00

uipc_syscalls.c

Retire the MALLOC and FREE macros. They are an abomination unto style(9).

2008-10-23 15:53:51 +00:00

uipc_usrreq.c

White space and comment tweaks.

2009-01-01 20:03:22 +00:00

vfs_acl.c

…

vfs_aio.c

Use the correct type for the timeout parameter to the 32-bit

2009-01-23 13:23:17 +00:00

vfs_bio.c

Remove the struct thread unuseful argument from bufobj interface.

2008-10-10 21:23:50 +00:00

vfs_cache.c

Convert the global mutex protecting the directory lookup name cache from a

2009-01-28 19:05:18 +00:00

vfs_cluster.c

…

vfs_default.c

Add a new VOP, VOP_VPTOCNP, which translates a vnode to its component name

2008-12-12 00:57:38 +00:00

vfs_export.c

drop rnh lock before destroying it

2008-12-28 14:32:27 +00:00

vfs_extattr.c

Do not call namei() while having another user-controlled vnode

2009-01-08 12:47:30 +00:00

vfs_hash.c

…

vfs_init.c

…

vfs_lookup.c

Do not return success and doomed vnode from lookup. LK_UPGRADE allows

2008-12-18 11:58:12 +00:00

vfs_mount.c

1) Fix a deadlock in the VFS:

2008-12-16 23:16:10 +00:00

vfs_subr.c

Tweak the wording for vfs_mark_atime() since the I/O it is avoiding by not

2009-01-23 22:13:00 +00:00

vfs_syscalls.c

Use shared vnode locks for fchdir().

2009-01-23 22:13:30 +00:00

vfs_vnops.c

Move the code from ufs_lookup.c used to do dotdot lookup, into

2009-01-21 14:51:38 +00:00

vnode_if.src

Move the VA_MARKATIME flag for VOP_SETATTR() out into its own VOP:

2009-01-21 14:42:00 +00:00