Attilio Rao d52d7aa871 Fix a bug in UMTX_PROFILING: ...

UMTX_PROFILING should really analyze the distribution of locks as they
index entries in the umtxq_chains hash-table.
However, the current implementation does add/dec the length counters
for *every* thread insert/removal, measuring at all really userland
contention and not the hash distribution.

Fix this by correctly add/dec the length counters in the points where
it is really needed.

Please note that this bug brought us questioning in the past the quality
of the umtx hash table distribution.
To date with all the benchmarks I could try I was not able to reproduce
any issue about the hash distribution on umtx.

Sponsored by:	EMC / Isilon storage division
Reviewed by:	jeff, davide
MFC after:	2 weeks

2013-03-21 19:58:25 +00:00

..

bus_if.m

Add a BUS_CHILD_DELETED() method that a bus can hook to allow it to cleanup

2012-08-21 18:13:09 +00:00

capabilities.conf

Sort syscalls properly.

2013-03-15 23:00:13 +00:00

clock_if.m

…

cpufreq_if.m

…

device_if.m

Revert r239178 and implement two new functions, namely

2012-08-15 15:42:57 +00:00

dtio_kdtrace.c

Change the module name for the I/O provider to "kernel" from

2012-09-25 19:16:28 +00:00

genassym.sh

…

imgact_aout.c

Cosmetics: define FREEBSD32_MINUSER and AOUT32_MINUSER for struct

2012-07-22 13:41:45 +00:00

imgact_elf32.c

…

imgact_elf64.c

…

imgact_elf.c

- Fix two possible overflows when testing if ELF program headers are on

2013-03-13 22:01:31 +00:00

imgact_gzip.c

Remove an old hack I noticed years ago, but never committed.

2012-06-28 07:33:43 +00:00

imgact_shell.c

The execution of the shebang script requires putting interpreter path,

2011-03-06 22:59:30 +00:00

inflate.c

…

init_main.c

print compiler version in the kernel banner

2013-02-02 11:58:35 +00:00

init_sysent.c

Regen after r247667.

2013-03-02 21:12:54 +00:00

kern_acct.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_alq.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_clock.c

Add a generic way to call per event allocate / release function.

2013-03-05 10:18:48 +00:00

kern_clocksource.c

- Make callout(9) tickless, relying on eventtimers(4) as backend for

2013-03-04 11:09:56 +00:00

kern_condvar.c

MFcalloutng:

2013-03-04 12:20:48 +00:00

kern_conf.c

Reject spaces and double quotation marks in device names. devctl(4)

2012-12-22 13:33:28 +00:00

kern_cons.c

cngetc: use cpu_spinwait to ease the cncheckc loop a tiny bit

2012-10-06 19:50:23 +00:00

kern_context.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

kern_cpu.c

Revert r175376 and tune cpufreq(4) frequency comparison logic instead.

2012-03-10 18:56:16 +00:00

kern_cpuset.c

Post r222812 KTR_CPUMASK started being initialized only as a tunable

2012-08-30 21:22:47 +00:00

kern_ctf.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_descrip.c

Use dedicated malloc type for filecaps-related data, so we can detect any

2013-03-03 23:25:45 +00:00

kern_dtrace.c

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

2011-11-07 06:44:47 +00:00

kern_environment.c

Reserve room for the terminating NUL when setting or getting kernel

2012-08-14 19:16:30 +00:00

kern_et.c

Fix incorrect assertion that caused panic when periodic-only timers used.

2013-03-13 06:42:01 +00:00

kern_event.c

Rework overflow checks of r247898 to not let too "intelligent" compiler to

2013-03-09 09:07:13 +00:00

kern_exec.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

kern_exit.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

kern_fail.c

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

2011-11-07 06:44:47 +00:00

kern_ffclock.c

Revise the sysctl handling code and restructure the hierarchy of sysctls

2011-12-01 07:19:13 +00:00

kern_fork.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

kern_gzio.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_hhook.c

Staticize malloc types.

2011-04-13 11:28:46 +00:00

kern_idle.c

On multi-core, multi-threaded PPC systems, it is important that the threads

2011-05-31 15:11:43 +00:00

kern_intr.c

MFcalloutng (r244355):

2013-03-04 11:22:19 +00:00

kern_jail.c

prison_racct_detach can be called for not fully initialized jail, so make it check that the jail has racct before doing anything

2012-12-18 18:34:36 +00:00

kern_khelp.c

Use the full and proper company name for Swinburne University of Technology

2011-04-12 08:13:18 +00:00

kern_kthread.c

Stop treating td_sigmask specially for the purposes of new thread

2012-05-26 20:03:47 +00:00

kern_ktr.c

ktr: correctly handle possible wrap-around in the boot buffer

2013-02-08 07:29:07 +00:00

kern_ktrace.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_linker.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_lock.c

lockmgr: unlock interlock (if requested) when dealing with upgrade/downgrade

2013-01-06 21:47:59 +00:00

kern_lockf.c

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

2011-11-07 06:44:47 +00:00

kern_lockstat.c

…

kern_loginclass.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

kern_malloc.c

Try to improve r242655 take III: move these SYSCTLs describing the kernel

2013-02-04 09:35:48 +00:00

kern_mbuf.c

Move the mbuf memory limit calculations from init_param2() to

2013-01-17 21:28:31 +00:00

kern_mib.c

fix some fat-fingering in r246246

2013-02-02 14:19:50 +00:00

kern_module.c

Fix a typo.

2012-08-22 20:01:57 +00:00

kern_mtxpool.c

…

kern_mutex.c

Fixup r240424: On entering KDB backends, the hijacked thread to run

2012-12-22 09:37:34 +00:00

kern_ntptime.c

Limit popcorn limit to something sane (either 2ns or 2 ticks if that's

2012-08-16 02:35:44 +00:00

kern_osd.c

…

kern_physio.c

Do not remap usermode pages into KVA for physio.

2013-03-19 14:43:57 +00:00

kern_pmc.c

Add software PMC support.

2012-03-28 20:58:30 +00:00

kern_poll.c

Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.

2011-11-07 15:43:11 +00:00

kern_priv.c

- Add sysctl to allow unprivileged users to call mlock(2)-family system

2012-12-18 07:36:45 +00:00

kern_proc.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

kern_prot.c

Style fix

2012-11-14 10:33:12 +00:00

kern_racct.c

Accessing td_state requires thread lock to be held.

2013-03-14 23:20:18 +00:00

kern_rangelock.c

Add a rangelock implementation, intended to be used to range-locking

2012-05-30 16:06:38 +00:00

kern_rctl.c

Add CPU percentage limit enforcement to RCTL. The resouce name is "pcpu".

2012-10-26 16:01:08 +00:00

kern_resource.c

Call sched_prio() to immediately change the priority of the thread in

2013-03-07 02:53:29 +00:00

kern_rmlock.c

Fixup r240424: On entering KDB backends, the hijacked thread to run

2012-12-22 09:37:34 +00:00

kern_rwlock.c

Fixup r240424: On entering KDB backends, the hijacked thread to run

2012-12-22 09:37:34 +00:00

kern_sdt.c

Instead of only iterating over the set of known SDT probes when sdt.ko is

2012-03-27 15:07:43 +00:00

kern_sema.c

…

kern_sharedpage.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

kern_shutdown.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

kern_sig.c

Tweak some comments.

2013-03-18 18:04:09 +00:00

kern_switch.c

Add a comment on why inlining critical_enter() may not be a good idea

2012-12-09 04:54:22 +00:00

kern_sx.c

Fixup r240424: On entering KDB backends, the hijacked thread to run

2012-12-22 09:37:34 +00:00

kern_synch.c

Partially revert r195702. Deferring stops is now implemented via a set of

2013-03-18 17:23:58 +00:00

kern_syscalls.c

…

kern_sysctl.c

- Use strdup(9) instead of reimplementing it.

2013-03-01 18:49:14 +00:00

kern_tc.c

- Make callout(9) tickless, relying on eventtimers(4) as backend for

2013-03-04 11:09:56 +00:00

kern_thr.c

Stop treating td_sigmask specially for the purposes of new thread

2012-05-26 20:03:47 +00:00

kern_thread.c

Another NFS SIGSTOP related fix: Ignore thread suspend requests due to

2013-03-21 14:06:27 +00:00

kern_time.c

Make kern_nanosleep() and pause_sbt() to use per-CPU sleep queues.

2013-03-12 06:58:49 +00:00

kern_timeout.c

Bring back the comment on the sizing of the callout array that got

2013-03-10 22:55:35 +00:00

kern_umtx.c

Fix a bug in UMTX_PROFILING:

2013-03-21 19:58:25 +00:00

kern_uuid.c

Convert all users of IF_ADDR_LOCK to use new locking macros that specify

2012-01-05 19:00:36 +00:00

kern_xxx.c

…

ksched.c

sched_rr_interval() seems always returned period in hz ticks, but same

2012-08-10 18:19:57 +00:00

link_elf_obj.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

link_elf.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

linker_if.m

…

Make.tags.inc

Disconnect non-MPSAFE SMBFS from the build in preparation for dropping

2012-10-18 12:04:56 +00:00

Makefile

Continue to introduce Capsicum Capability Mode support:

2011-03-01 13:28:27 +00:00

makesyscalls.sh

- Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate()

2011-11-21 01:26:10 +00:00

md4c.c

…

md5c.c

…

p1003_1b.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

posix4_mib.c

Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which

2011-07-17 23:05:24 +00:00

sched_4bsd.c

Add CPU percentage limit enforcement to RCTL. The resouce name is "pcpu".

2012-10-26 16:01:08 +00:00

sched_ule.c

Fix bug in r242852 that prevented CPU from becoming idle if kernel built

2012-11-15 14:10:51 +00:00

serdev_if.m

…

stack_protector.c

…

subr_acl_nfs4.c

Fix bug where NFSv4 ACL enforcement code wouldn't unconditionally

2012-04-17 14:54:00 +00:00

subr_acl_posix1e.c

Add module load/unload stubs.

2012-03-13 20:27:48 +00:00

subr_autoconf.c

Retire PCONFIG and leave the priority of thread0 alone when waiting for

2011-01-06 22:09:37 +00:00

subr_blist.c

Remove reference to the rlist code from comments, and fix a typo visible

2013-02-05 20:08:33 +00:00

subr_bufring.c

…

subr_bus_dma.c

Implement the concept of the unmapped VMIO buffers, i.e. buffers which

2013-03-19 14:13:12 +00:00

subr_bus.c

Fix a typo.

2013-01-23 14:37:05 +00:00

subr_busdma_bufalloc.c

Create an architecture-agnostic buffer pool manager that uses uma(9) to

2012-12-20 00:34:54 +00:00

subr_clock.c

Improve style and wording of comments and sysctl descriptions [1].

2011-01-09 14:34:56 +00:00

subr_devstat.c

Fix build for kernels with dtrace hooks.

2012-07-11 18:50:50 +00:00

subr_disk.c

…

subr_dummy_vdso_tc.c

Implement mechanism to export some kernel timekeeping data to

2012-06-22 07:06:40 +00:00

subr_eventhandler.c

…

subr_fattime.c

…

subr_firmware.c

Correct sizeof usage

2012-06-25 05:41:16 +00:00

subr_hash.c

Convert panic()s to KASSERT()s. This is an optimisation for

2012-01-23 16:31:46 +00:00

subr_hints.c

Style fixes.

2012-09-04 23:16:55 +00:00

subr_kdb.c

- Extend the KDB interface to add a per-debugger callback to print a

2012-04-12 17:43:59 +00:00

subr_kobj.c

As it turns out, r186347 actually is insufficient to avoid the use of the

2011-11-15 20:11:03 +00:00

subr_lock.c

- Implement run-time expansion of the KTR buffer via sysctl.

2012-11-15 00:51:57 +00:00

subr_log.c

MFcalloutng (r244255 by mav, with minor changes):

2013-03-04 16:07:55 +00:00

subr_mbpool.c

…

subr_mchain.c

Mechanically substitute flags from historic mbuf allocator with

2012-12-05 08:04:20 +00:00

subr_module.c

Provide convenience function for obtaining MODINFO_ADDR and MODINFO_SIZE

2011-02-09 19:08:21 +00:00

subr_msgbuf.c

- Clean up timestamps in msgbuf code. The timestamps should now be

2012-03-19 00:36:32 +00:00

subr_param.c

Implement the concept of the unmapped VMIO buffers, i.e. buffers which

2013-03-19 14:13:12 +00:00

subr_pcpu.c

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

2011-11-07 06:44:47 +00:00

subr_power.c

…

subr_prf.c

Fix double vision syndrome (read: double output) when in the

2011-10-16 14:16:46 +00:00

subr_prof.c

Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.

2011-11-07 15:43:11 +00:00

subr_rman.c

Unlock in the error path to prevent a lock leak.

2012-05-31 17:27:05 +00:00

subr_rtc.c

Core structure and functions to support a feed-forward clock within the kernel.

2011-11-19 14:10:16 +00:00

subr_sbuf.c

r222015 introduced a new assertion that the size of a fixed-length sbuf

2011-08-19 08:29:10 +00:00

subr_scanf.c

Xen netback driver rewrite.

2012-01-26 16:35:09 +00:00

subr_sglist.c

…

subr_sleepqueue.c

Partially revert r195702. Deferring stops is now implemented via a set of

2013-03-18 17:23:58 +00:00

subr_smp.c

- Correctly handle EWOULDBLOCK in quiesce_cpus

2012-12-19 20:08:06 +00:00

subr_stack.c

Constify stack argument for functions that don't modify it.

2011-11-16 19:06:55 +00:00

subr_syscall.c

Fix build on ARM (and probably other platforms)

2012-12-28 06:52:53 +00:00

subr_taskqueue.c

Add a special meaning to the negative ticks argument for

2012-11-20 15:33:48 +00:00

subr_trap.c

Partially revert r195702. Deferring stops is now implemented via a set of

2013-03-18 17:23:58 +00:00

subr_turnstile.c

Update the comment: we do show the backtrace of misbehaving thread.

2013-02-17 21:37:32 +00:00

subr_uio.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

subr_unit.c

Correct double "the the"

2012-09-14 21:28:56 +00:00

subr_witness.c

Correct the lock class for the vm object lock.

2013-03-09 10:16:08 +00:00

sys_capability.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

sys_generic.c

Rework overflow checks of r247898 to not let too "intelligent" compiler to

2013-03-09 09:07:13 +00:00

sys_pipe.c

Remove redundant space.

2013-02-17 11:48:16 +00:00

sys_procdesc.c

Add the wait6(2) system call. It takes POSIX waitid()-like process

2012-11-13 12:52:31 +00:00

sys_process.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

sys_socket.c

Add the fo_chown and fo_chmod methods to struct fileops and use them

2011-08-16 20:07:47 +00:00

syscalls.c

Regen after r247667.

2013-03-02 21:12:54 +00:00

syscalls.master

- Implement two new system calls:

2013-03-02 21:11:30 +00:00

systrace_args.c

Regen after r247667.

2013-03-02 21:12:54 +00:00

sysv_ipc.c

…

sysv_msg.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

sysv_sem.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

sysv_shm.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

tty_compat.c

…

tty_info.c

Fix whitespace inconsistencies in TTY code.

2012-02-06 18:15:46 +00:00

tty_inq.c

Use strchr() and strrchr().

2012-01-02 12:12:10 +00:00

tty_outq.c

Fix whitespace inconsistencies in the TTY layer and its drivers owned by me.

2011-06-26 18:26:20 +00:00

tty_pts.c

Fix possible fp reference leak in posix_openpt

2012-11-18 15:48:34 +00:00

tty_tty.c

Finish r210923, 210926. Mark some devices as eternal.

2011-01-04 10:59:38 +00:00

tty_ttydisc.c

Correct SIGTTIN handling.

2012-10-25 09:05:21 +00:00

tty.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

uipc_accf.c

…

uipc_cow.c

Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/

2011-02-25 10:11:01 +00:00

uipc_debug.c

…

uipc_domain.c

- Implement two new system calls:

2013-03-02 21:11:30 +00:00

uipc_mbuf2.c

Mechanically substitute flags from historic mbuf allocator with

2012-12-05 08:04:20 +00:00

uipc_mbuf.c

In m_align() add assertions that mbuf is virgin, similar to assertions

2013-03-17 07:41:14 +00:00

uipc_mqueue.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

uipc_sem.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

uipc_shm.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

uipc_sockbuf.c

Use m_get() and m_getcl() instead of compat macros.

2013-03-15 10:21:18 +00:00

uipc_socket.c

Implement SOCK_CLOEXEC, SOCK_NONBLOCK and MSG_CMSG_CLOEXEC.

2013-03-19 20:58:17 +00:00

uipc_syscalls.c

Implement SOCK_CLOEXEC, SOCK_NONBLOCK and MSG_CMSG_CLOEXEC.

2013-03-19 20:58:17 +00:00

uipc_usrreq.c

Implement SOCK_CLOEXEC, SOCK_NONBLOCK and MSG_CMSG_CLOEXEC.

2013-03-19 20:58:17 +00:00

vfs_acl.c

Prezero the acl structure which is to be copied to usermode, to avoid

2013-02-06 15:18:46 +00:00

vfs_aio.c

Do not remap usermode pages into KVA for physio.

2013-03-19 14:43:57 +00:00

vfs_bio.c

Only size and create the bio_transient_map when unmapped buffers are

2013-03-21 07:28:15 +00:00

vfs_cache.c

When renaming a directory from one parent directory to another,

2013-03-20 17:57:00 +00:00

vfs_cluster.c

Implement the concept of the unmapped VMIO buffers, i.e. buffers which

2013-03-19 14:13:12 +00:00

vfs_default.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

vfs_export.c

Further refine the handling of stop signals in the NFS client. The

2013-02-21 19:02:50 +00:00

vfs_extattr.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

vfs_hash.c

Add exported vfs_hash_index() function, which calculates the canonical

2013-01-14 05:41:40 +00:00

vfs_init.c

Don't worry if a module is already loaded when looking for a fstype to mount

2013-02-21 02:41:37 +00:00

vfs_lookup.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

vfs_mount.c

When the journaled FFS volume is suspended due to the journal space

2013-03-20 21:07:49 +00:00

vfs_mountroot.c

Do not allocate buffer of the 255 bytes length on the stack.

2012-12-04 20:49:04 +00:00

vfs_subr.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

vfs_syscalls.c

Require CAP_SEEK if both O_APPEND and O_TRUNC flags are absent.

2013-03-16 23:19:13 +00:00

vfs_vnops.c

Separate the copyright lines and the informational block by a blank line.

2013-03-15 14:01:37 +00:00

vnode_if.src

remove vop_lookup_pre and vop_lookup_post

2012-11-22 10:36:10 +00:00