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Robert Wing 3c85ca21d1 fd: free old file descriptor tables when not shared 
During the life of a process, new file descriptor tables may be allocated. When
a new table is allocated, the old table is placed in a free list and held onto
until all processes referencing them exit.

When a new file descriptor table is allocated, the old file descriptor table
can be freed when the current process has a single-thread and the file
descriptor table is not being shared with any other processes.

Reviewed by:    kevans
Approved by:    kevans (mentor)
Differential Revision:  https://reviews.freebsd.org/D18617
2020-11-22 05:00:28 +00:00
..
bus_if.m
Remove trailing white space.
2020-02-26 16:22:28 +00:00
capabilities.conf
Permit cpuset_(get|set)domain() in capability mode.
2020-07-06 16:34:29 +00:00
clock_if.m
…
cpufreq_if.m
…
device_if.m
…
genassym.sh
…
genoffset.c
Merge td_epochnest with td_no_sleeping.
2019-10-29 17:28:25 +00:00
genoffset.sh
…
imgact_aout.c
Get rid of sv_errtbl and SV_ABI_ERRNO().
2020-09-17 11:39:33 +00:00
imgact_binmisc.c
imgact_binmisc: limit the extent of match on incoming entries
2020-11-08 04:24:29 +00:00
imgact_elf32.c
…
imgact_elf64.c
…
imgact_elf.c
Split out cwd/root/jail, cmask state from filedesc table
2020-11-17 21:14:13 +00:00
imgact_shell.c
…
init_main.c
Split out cwd/root/jail, cmask state from filedesc table
2020-11-17 21:14:13 +00:00
init_sysent.c
Regen after r366145.
2020-09-25 10:05:38 +00:00
kern_acct.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_alq.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_clock.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_clocksource.c
…
kern_condvar.c
…
kern_conf.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_cons.c
Remove sysctl_kern_consmute()
2020-10-05 15:54:19 +00:00
kern_context.c
…
kern_cpu.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_cpuset.c
cpuset: refcount-clean
2020-11-17 00:04:05 +00:00
kern_ctf.c
vfs: drop the mostly unused flags argument from VOP_UNLOCK
2020-01-03 22:29:58 +00:00
kern_descrip.c
fd: free old file descriptor tables when not shared
2020-11-22 05:00:28 +00:00
kern_dtrace.c
…
kern_dump.c
Avoid dump_avail[] redefinition.
2020-10-14 22:51:40 +00:00
kern_environment.c
Move kernel env global variables, etc to sys/kenv.h
2020-10-07 06:16:37 +00:00
kern_et.c
Remove NO_EVENTTIMERS support
2020-11-19 02:50:48 +00:00
kern_event.c
kqueue: save space by using only one func pointer for assertions
2020-11-09 00:04:35 +00:00
kern_exec.c
Stop using eventhandlers for itimers subsystem exec and exit hooks.
2020-11-21 21:43:36 +00:00
kern_exit.c
Stop using eventhandlers for itimers subsystem exec and exit hooks.
2020-11-21 21:43:36 +00:00
kern_fail.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_ffclock.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
kern_fork.c
linux(4) clone(2): Correctly handle CLONE_FS and CLONE_FILES
2020-11-17 21:20:11 +00:00
kern_hhook.c
Remove duplicated empty lines from kern/*.c
2020-01-30 20:05:05 +00:00
kern_idle.c
…
kern_intr.c
Allow swi_sched() to be called from NMI context.
2020-07-25 15:19:38 +00:00
kern_jail.c
jail: introduce per jail suser_enabled setting
2020-11-18 21:07:08 +00:00
kern_kcov.c
Mark COVERAGE and KCOV as part of KCSAN
2020-08-19 14:11:25 +00:00
kern_khelp.c
…
kern_kthread.c
thread: rework tidhash vs proc lock interaction
2020-11-11 08:50:04 +00:00
kern_ktr.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_ktrace.c
Move KTRUSERRET() from userret() to ast(). It's a really long
2020-10-03 12:03:08 +00:00
kern_linker.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_lock.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_lockf.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_lockstat.c
Add lockmgr(9) probes to the lockstat DTrace provider.
2019-08-21 23:43:58 +00:00
kern_loginclass.c
Drop "All rights reserved" from all my stuff. This includes
2020-10-28 13:46:11 +00:00
kern_malloc.c
malloc: make malloc_large closer to standalone
2020-11-16 17:56:58 +00:00
kern_mbuf.c
Add m_snd_tag_alloc() as a wrapper around if_snd_tag_alloc().
2020-10-29 23:28:39 +00:00
kern_mib.c
Make sysctl user.local a tunable that can be written at run-time
2020-10-31 23:48:41 +00:00
kern_module.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_mtxpool.c
Remove duplicated empty lines from kern/*.c
2020-01-30 20:05:05 +00:00
kern_mutex.c
mtx: add mtx_wait_unlocked
2020-08-04 23:00:00 +00:00
kern_ntptime.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_osd.c
…
kern_physio.c
physio: Don't store user addresses in bio_data
2020-10-15 17:05:21 +00:00
kern_pmc.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_poll.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
kern_priv.c
Add CTLFLAG_MPSAFE to the suser_enabled sysctl.
2020-11-18 21:26:14 +00:00
kern_proc.c
Split out cwd/root/jail, cmask state from filedesc table
2020-11-17 21:14:13 +00:00
kern_procctl.c
correct procctl(PROC_PROTMAX_STATUS _NOFORCE return
2020-05-01 14:30:59 +00:00
kern_prot.c
cred: fix minor nits in r367695
2020-11-19 04:28:39 +00:00
kern_racct.c
Drop "All rights reserved" from all my stuff. This includes
2020-10-28 13:46:11 +00:00
kern_rangelock.c
rangelock: add rangelock_cookie_assert
2019-09-15 02:59:53 +00:00
kern_rctl.c
Drop "All rights reserved" from all my stuff. This includes
2020-10-28 13:46:11 +00:00
kern_resource.c
thread: batch resource limit free calls
2020-11-14 19:21:46 +00:00
kern_rmlock.c
rms: several cleanups + debug read lockers handling
2020-11-07 16:57:53 +00:00
kern_rwlock.c
locks: fix a long standing bug for primitives with kdtrace but without spinning
2020-07-23 17:26:53 +00:00
kern_sdt.c
…
kern_sema.c
…
kern_sendfile.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
kern_sharedpage.c
random(4) FenestrasX: Push root seed version to arc4random(3)
2020-10-10 21:52:00 +00:00
kern_shutdown.c
Add an option for entering KDB on recursive panics
2020-11-19 18:03:40 +00:00
kern_sig.c
sig_intr(9): return early if AST is not scheduled.
2020-10-08 22:34:34 +00:00
kern_switch.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
kern_sx.c
locks: fix a long standing bug for primitives with kdtrace but without spinning
2020-07-23 17:26:53 +00:00
kern_synch.c
Handle PCATCH in blockcount_sleep() so it can be interrupted.
2020-04-21 17:13:06 +00:00
kern_syscalls.c
Move syscall_thread_{enter,exit}() into the slow path. This is only
2020-11-08 15:54:59 +00:00
kern_sysctl.c
sysctl+kern_sysctl: Honor SKIP for descendant nodes
2020-10-24 16:17:07 +00:00
kern_tc.c
Remove double-calls to tc_get_timecount() to warm timecounters.
2020-06-10 22:30:32 +00:00
kern_thr.c
thread: rework tidhash vs proc lock interaction
2020-11-11 08:50:04 +00:00
kern_thread.c
thread: numa-aware zombie reaping
2020-11-19 10:00:48 +00:00
kern_time.c
Stop using eventhandlers for itimers subsystem exec and exit hooks.
2020-11-21 21:43:36 +00:00
kern_timeout.c
callout(9): Fix a race between CPU migration and callout_drain()
2020-11-19 18:37:28 +00:00
kern_tslog.c
…
kern_ubsan.c
Remove duplicated empty lines from kern/*.c
2020-01-30 20:05:05 +00:00
kern_umtx.c
Remove unused prototype.
2020-11-21 10:58:19 +00:00
kern_uuid.c
validate_uuid: absorb the rest of parse_uuid with a flags arg
2020-04-15 18:39:12 +00:00
kern_xxx.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
ksched.c
…
link_elf_obj.c
link_elf_obj: Colour VM objects
2020-10-19 16:57:59 +00:00
link_elf.c
malloc: delegate M_EXEC handling to dedicacted routines
2020-10-30 20:02:32 +00:00
linker_if.m
…
Make.tags.inc
Remove a couple of harmless stray references to nandfs.
2019-06-25 16:39:25 +00:00
Makefile
sys/kern sysent: re-add dependency on capabilities.conf
2020-02-12 19:06:34 +00:00
makesyscalls.sh
makesyscalls.sh: improve the 'this is going away' message
2020-07-28 01:05:40 +00:00
md4c.c
…
md5c.c
…
msi_if.m
o Add iommu de-initialization method for MSI interface.
2020-10-24 20:09:27 +00:00
p1003_1b.c
…
pic_if.m
…
posix4_mib.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
sched_4bsd.c
sched: fix an incorrect comparison in sched_lend_user_prio_cond
2020-11-15 01:54:44 +00:00
sched_ule.c
sched: fix an incorrect comparison in sched_lend_user_prio_cond
2020-11-15 01:54:44 +00:00
serdev_if.m
…
stack_protector.c
…
subr_acl_nfs4.c
Drop "All rights reserved" from all my stuff. This includes
2020-10-28 13:46:11 +00:00
subr_acl_posix1e.c
vfs: remove the obsolete privused argument from vaccess
2020-08-05 09:27:03 +00:00
subr_atomic64.c
emulated atomic64: disable interrupts as the lock mechanism on !SMP
2020-01-03 18:29:20 +00:00
subr_autoconf.c
…
subr_blist.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_boot.c
…
subr_bufring.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_bus_dma.c
Move the iommu stubs to a generic place, so they are available on all the
2020-10-23 21:27:48 +00:00
subr_bus.c
newbus: use ssize_t to match sb's len and size, fix ordering of space check
2020-10-12 22:07:44 +00:00
subr_busdma_bufalloc.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_capability.c
Remove unused SYSINIT macros for capability rights.
2020-03-26 15:02:37 +00:00
subr_clock.c
Remove duplicated empty lines from kern/*.c
2020-01-30 20:05:05 +00:00
subr_compressor.c
clamp kernel dump compression level when using gzip
2020-02-20 23:53:48 +00:00
subr_counter.c
Rationalize per-cpu zones.
2020-11-05 15:08:56 +00:00
subr_coverage.c
Mark COVERAGE and KCOV as part of KCSAN
2020-08-19 14:11:25 +00:00
subr_csan.c
Add NetBSD compatible bus_space_peek_N() and bus_space_poke_N() functions.
2020-09-19 11:06:41 +00:00
subr_devmap.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_devstat.c
Fix asymmetry in devstat(9) calls by GEOM.
2020-10-24 21:07:10 +00:00
subr_disk.c
Enable bioq 'car limit' added at r335066 at 128 bios.
2020-10-26 04:04:06 +00:00
subr_dummy_vdso_tc.c
…
subr_early.c
…
subr_epoch.c
epoch: support non-preemptible epochs checking in_epoch()
2020-11-07 03:29:04 +00:00
subr_eventhandler.c
…
subr_fattime.c
Remove duplicated empty lines from kern/*.c
2020-01-30 20:05:05 +00:00
subr_filter.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_firmware.c
Fix a panic when unloading firmware
2020-06-29 21:35:50 +00:00
subr_gtaskqueue.c
Remove the "config" taskqgroup and its KPIs.
2020-03-30 14:24:03 +00:00
subr_hash.c
…
subr_hints.c
Move kernel env global variables, etc to sys/kenv.h
2020-10-07 06:16:37 +00:00
subr_intr.c
Also pass interrupt binding request to non-root interrupt controllers.
2020-11-20 09:05:36 +00:00
subr_kdb.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
subr_kobj.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_lock.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_log.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_mchain.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_module.c
Fix a loop condition
2020-10-08 18:29:17 +00:00
subr_msgbuf.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_param.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
subr_pcpu.c
Add more per-cpu zones.
2020-11-09 00:34:23 +00:00
subr_pctrie.c
Use SMR to provide safe unlocked lookup for pctries from SMR zones
2020-07-24 17:32:10 +00:00
subr_physmem.c
Avoid dump_avail[] redefinition.
2020-10-14 22:51:40 +00:00
subr_pidctrl.c
…
subr_power.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_prf.c
remove %n support from printf(9)
2020-05-09 15:56:02 +00:00
subr_prng.c
Add prng(9) API
2020-08-13 20:48:14 +00:00
subr_prof.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
subr_rangeset.c
…
subr_rman.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
subr_rtc.c
Address whitespace nits in subr_rtc.c
2020-09-28 17:19:57 +00:00
subr_sbuf.c
Remove duplicated empty lines from kern/*.c
2020-01-30 20:05:05 +00:00
subr_scanf.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_sfbuf.c
…
subr_sglist.c
Step 4.2: start divorce of M_EXT and M_EXTPG
2020-05-03 00:37:16 +00:00
subr_sleepqueue.c
Refactor sleepq_catch_signals().
2020-10-04 16:30:05 +00:00
subr_smp.c
smp: fix smp_rendezvous_cpus_retry usage before smp starts
2020-11-19 04:27:51 +00:00
subr_smr.c
Use COUNTER_U64_DEFINE_EARLY() in places where it simplifies things.
2020-03-06 19:10:00 +00:00
subr_stack.c
kern.tty_info_kstacks: add a compact format
2020-07-06 16:33:28 +00:00
subr_stats.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
subr_syscall.c
Allow some VOPs to return ERELOOKUP to indicate VFS operation restart at top level.
2020-11-13 09:42:32 +00:00
subr_taskqueue.c
Add flag to struct task to mark the task as requiring network epoch.
2020-02-11 18:48:07 +00:00
subr_terminal.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_trap.c
Move KTRUSERRET() from userret() to ast(). It's a really long
2020-10-03 12:03:08 +00:00
subr_turnstile.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_uio.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_unit.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
subr_vmem.c
vmem: trivial warning and style fixes.
2020-11-17 02:18:34 +00:00
subr_witness.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
sys_capability.c
Enter a write sequence when updating rights.
2020-03-19 15:39:45 +00:00
sys_generic.c
select: replace reference counting with memory barriers in selfd
2020-11-16 03:09:18 +00:00
sys_getrandom.c
Fix a typo in r356667 comment
2020-01-12 23:52:16 +00:00
sys_pipe.c
pipe: thundering herd problem in pipelock
2020-11-19 19:25:47 +00:00
sys_procdesc.c
procdesc: convert the zone to a malloc type
2020-11-09 00:05:21 +00:00
sys_process.c
Get rid of sa->narg. It serves no purpose; use sa->callp->sy_narg instead.
2020-09-27 18:47:06 +00:00
sys_socket.c
The ioctl() calls using FIONREAD, FIONWRITE, FIONSPACE, and SIOCATMARK
2020-11-07 21:17:49 +00:00
syscalls.c
Update the files created from the new syscalls.master from r361599.
2020-05-28 21:23:02 +00:00
syscalls.master
Add a syscall for the nfs-over-tls daemons to use.
2020-05-28 21:06:10 +00:00
systrace_args.c
Update the files created from the new syscalls.master from r361599.
2020-05-28 21:23:02 +00:00
sysv_ipc.c
…
sysv_msg.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
sysv_sem.c
sysv_sem: semusz depends on semume.
2020-10-22 09:28:11 +00:00
sysv_shm.c
sysvshm: pass relevant uap members as arguments
2020-11-03 19:14:03 +00:00
tty_compat.c
…
tty_info.c
kern.tty_info_kstacks: set compact format as default
2020-07-06 16:34:15 +00:00
tty_inq.c
…
tty_outq.c
…
tty_pts.c
tty_pts: don't rely on tty header pollution for sys/mutex.h
2019-11-29 03:56:01 +00:00
tty_tty.c
…
tty_ttydisc.c
Implement FLUSHO
2020-08-27 05:11:15 +00:00
tty.c
Check for process group change in tty_wait_background().
2020-10-28 22:12:47 +00:00
uipc_accf.c
Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)
2020-02-26 14:26:36 +00:00
uipc_debug.c
…
uipc_domain.c
- Move global network epoch definition to epoch.h, as more different
2020-01-15 03:34:21 +00:00
uipc_ktls.c
Add m_snd_tag_alloc() as a wrapper around if_snd_tag_alloc().
2020-10-29 23:28:39 +00:00
uipc_mbuf2.c
m_pulldown(): Change an if () panic() into a KASSERT().
2019-11-06 22:40:19 +00:00
uipc_mbuf.c
Permit sending empty fragments for TLS 1.0.
2020-10-13 17:30:34 +00:00
uipc_mbufhash.c
Implement mbuf hashing routines for IP over infiniband, IPoIB.
2020-10-22 09:17:56 +00:00
uipc_mqueue.c
Split out cwd/root/jail, cmask state from filedesc table
2020-11-17 21:14:13 +00:00
uipc_sem.c
Split out cwd/root/jail, cmask state from filedesc table
2020-11-17 21:14:13 +00:00
uipc_shm.c
Split out cwd/root/jail, cmask state from filedesc table
2020-11-17 21:14:13 +00:00
uipc_sockbuf.c
Permit sending empty fragments for TLS 1.0.
2020-10-13 17:30:34 +00:00
uipc_socket.c
kqueue: save space by using only one func pointer for assertions
2020-11-09 00:04:35 +00:00
uipc_syscalls.c
Only enable COMPAT_43 changes for syscalls ABI for a.out processes.
2019-08-11 19:16:07 +00:00
uipc_usrreq.c
Split out cwd/root/jail, cmask state from filedesc table
2020-11-17 21:14:13 +00:00
vfs_acl.c
vfs: fix trivial whitespace issues which don't interefere with blame
2020-07-10 09:01:36 +00:00
vfs_aio.c
vmspace: Convert to refcount(9)
2020-11-04 16:30:56 +00:00
vfs_bio.c
vmapbuf: don't smuggle address or length in buf
2020-10-21 16:00:15 +00:00
vfs_cache.c
vfs: group mount per-cpu vars into one struct
2020-11-09 23:02:13 +00:00
vfs_cluster.c
vfs: fix trivial whitespace issues which don't interefere with blame
2020-07-10 09:01:36 +00:00
vfs_default.c
vfs: group mount per-cpu vars into one struct
2020-11-09 23:02:13 +00:00
vfs_export.c
kern: clean up empty lines in .c and .h files
2020-09-01 22:12:32 +00:00
vfs_extattr.c
vfs_extattr: Allow extattr names up to the full max
2020-05-14 03:01:23 +00:00
vfs_hash.c
vfs: avoid exposing partially constructed vnodes
2020-09-05 00:26:03 +00:00
vfs_init.c
vfs: fix trivial whitespace issues which don't interefere with blame
2020-07-10 09:01:36 +00:00
vfs_lookup.c
vfs: change nt_zone into a malloc type
2020-11-05 12:06:50 +00:00
vfs_mount.c
vfs: group mount per-cpu vars into one struct
2020-11-09 23:02:13 +00:00
vfs_mountroot.c
cache: drop the force flag from purgevfs
2020-09-23 10:46:07 +00:00
vfs_subr.c
Fix a few nits in vn_printf().
2020-11-18 16:21:37 +00:00
vfs_syscalls.c
Split out cwd/root/jail, cmask state from filedesc table
2020-11-17 21:14:13 +00:00
vfs_vnops.c
Only attempt a VOP_UNLOCK() when the vn_lock() has been successful.
2020-11-20 20:22:01 +00:00
vnode_if.src
vfs: prevent avoidable evictions on mkdir of existing directories
2020-10-22 19:28:12 +00:00