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114a1006a8
freebsd-nq/sys/kern
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Jeff Roberson 114a1006a8 - Change holdcnt use around vnode recycling. We now always keep a holdcnt 
ref while we're calling vgone().  This prevents transient refs from
   re-adding us to the free list.  Previously, a vfree() triggered via
   vinvalbuf() getting rid of all of a vnode's pages could place a partially
   destructed vnode on the free list where vtryrecycle() could find it.  The
   first call to vtryrecycle would hang up on the vnode lock, but when it
   failed it would place a now dead vnode onto the free list, and another
   call to vtryrecycle() would free an already free vnode.  There were many
   complications of having a zero ref count while freeing which can now go
   away.
 - Change vdropl() to release the interlock before returning.  All callers
   now respect this, so vdropl() directly frees VI_DOOMED vnodes once the
   last ref is dropped.  This means that we'll never have VI_DOOMED vnodes
   on the free list.
 - Seperate v_incr_usecount() into v_incr_usecount(), v_decr_usecount() and
   v_decr_useonly().  The incr/decr split is so that incr usecount can
   return with the interlock still held while decr drops the interlock so
   it can call vdropl() which will potentially free the vnode.  The calling
   function can't drop the lock of an already free'd node.  v_decr_useonly()
   drops a usecount without droping the hold count.  This is done so the
   usecount reaches zero in vput() before we recycle, however the holdcount
   is still 1 which prevents any new references from placing the vnode
   back on the free list.
 - Fix vnlrureclaim() to vhold the vnode since it doesn't do a vget().  We
   wouldn't want vnlrureclaim() to bump the usecount since this has
   different semantics.  Also change vnlrureclaim() to do a NOWAIT on the
   vn_lock.  When this function runs we're usually in a desperate situation
   and we wouldn't want to wait for any specific vnode to be released.
 - Fix a bunch of misc comments to reflect the new behavior.
 - Add vhold() and vdrop() to vflush() for the same reasons that we do in
   vlrureclaim().  Previously we held no reference and a vnode could have
   been freed while we were waiting on the lock.
 - Get rid of vlruvp() and vfreehead().  Neither are used.  vlruvp() should
   really be rethought before it's reintroduced.
 - vgonel() always returns with the vnode locked now and never puts the
   vnode back on a free list.  The vnode will be freed as soon as the last
   reference is released.

Sponsored by:	Isilon Systems, Inc.
Debugging help from:	Kris Kennaway, Peter Holm
Approved by:	re (blanket vfs)
2005-06-16 04:41:42 +00:00
..
bus_if.m /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
clock_if.m /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
cpufreq_if.m Introduce a new method, cpufreq_drv_type(), that returns the type of the 2005-02-18 00:23:36 +00:00
device_if.m /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
genassym.sh
imgact_aout.c - Neither of our image formats require Giant now that the vm and vfs have 2005-05-03 10:51:38 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c Don't set the default of kern.fallback_elf_brand to FreeBSD for arm, as 2005-05-24 22:21:44 +00:00
imgact_gzip.c - Change the vm_mmap() function to accept an objtype_t parameter specifying 2005-04-01 20:00:11 +00:00
imgact_shell.c Remove the previous parsing-logic for arguments on the '#!'-line of shell 2005-06-09 00:27:02 +00:00
inflate.c
init_main.c Add /rescue/init to the default init_path, before /stand/sysinstall. 2005-02-17 10:00:10 +00:00
init_sysent.c Rebuild generated system call definition files following the addition of 2005-05-30 15:20:21 +00:00
kern_acct.c When mac_check_system_acct() fails, make sure to unlock as well as close 2005-03-01 08:56:13 +00:00
kern_acl.c Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is 2004-07-26 07:24:04 +00:00
kern_alq.c Modify the alq(9) alq_open() API to accept a file creation mode, rather 2005-04-16 12:12:27 +00:00
kern_clock.c Kernel hooks to support PMC sampling modes. 2005-05-30 06:29:29 +00:00
kern_condvar.c Refine the turnstile and sleep queue interfaces just a bit: 2004-10-12 18:36:20 +00:00
kern_conf.c cdev (still) needs per instance uid/gid/mode 2005-03-31 10:29:57 +00:00
kern_context.c
kern_cpu.c Add debugging prints to all the methods in case there are problems with 2005-04-10 19:11:23 +00:00
kern_descrip.c - Use NAMEI to pickup Giant if we need it in fpcheckstd(). 2005-05-03 10:52:22 +00:00
kern_environment.c My addled brains didn't realize that since vtp points into value, we 2005-03-09 12:16:45 +00:00
kern_event.c Wrap copyin/copyout for kevent so the 32bit wrapper does not have 2005-06-03 23:15:01 +00:00
kern_exec.c MFP4: 2005-06-09 19:45:09 +00:00
kern_exit.c Use low level constructs borrowed from interrupt threads to wait for 2005-05-23 23:01:53 +00:00
kern_fork.c Inherit signal mask for child process in fork1(), RELENG_4 and other 2005-04-20 13:14:52 +00:00
kern_idle.c Divorce critical sections from spinlocks. Critical sections as denoted by 2005-04-04 21:53:56 +00:00
kern_intr.c Use PCPU_LAZY_INC() for cnt.v_{intr,trap,syscalls} rather than atomic 2005-04-12 23:18:54 +00:00
kern_jail.c Rename sysctl security.jail.getfsstatroot_only to security.jail.enforce_statfs 2005-06-09 18:49:19 +00:00
kern_kse.c Remove thread_upcall_check, it was used to avoid race bug in earlier 2005-05-27 15:57:27 +00:00
kern_kthread.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_ktr.c - Add curthread to the state that ktr is saving. The extra information is 2005-06-10 23:21:29 +00:00
kern_ktrace.c Remove process information leak from inside a jail, when 2005-06-09 18:33:21 +00:00
kern_linker.c Fix panic when module is compiled in and it is loaded from loader.conf. 2005-05-28 23:20:05 +00:00
kern_lock.c - Differentiate two UPGRADE panics so I have a better idea of what's going 2005-04-12 05:43:03 +00:00
kern_lockf.c Print name of device instead of useless major/minor numbers. 2005-03-29 08:13:01 +00:00
kern_mac.c Get the directory structure correct in a comment. 2005-04-22 19:09:12 +00:00
kern_malloc.c Fix typo. 2005-06-10 18:06:59 +00:00
kern_mbuf.c Well, it seems that I pre-maturely removed the "All rights reserved" 2005-02-16 21:45:59 +00:00
kern_mib.c Add a sysctl that records the amount of physical memory in the machine. 2005-02-28 21:42:56 +00:00
kern_module.c Swap the arguments for CP so we copy the correct source and 2005-02-18 22:14:40 +00:00
kern_mtxpool.c Make a bunch of malloc types static. 2005-02-10 12:02:37 +00:00
kern_mutex.c Add additional newline to debug.mutex.prof.stats header, so that 2005-04-08 14:14:09 +00:00
kern_ntptime.c Explicitly acquire Giant around the ntp_gettime() and assert it in the 2005-05-28 14:34:41 +00:00
kern_physio.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_pmc.c MFP4: 2005-06-09 19:45:09 +00:00
kern_poll.c Remove recently added note about DEVICE_POLLING not working with SMP. 2005-02-25 22:07:51 +00:00
kern_proc.c Add a sysctl that returns the full path of a process' text file. 2005-04-18 02:10:37 +00:00
kern_prot.c Introduce p_canwait() and MAC Framework and MAC Policy entry points 2005-04-18 13:36:57 +00:00
kern_resource.c Giant is no longer required in kern_setrlimit(); remove its acquisition and 2005-06-01 17:52:51 +00:00
kern_sema.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_shutdown.c - Remove unused include. 2005-04-12 05:45:58 +00:00
kern_sig.c Fix a bug relavant to debugging, a masked signal unexpectedly interrupts 2005-06-06 05:13:10 +00:00
kern_subr.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_switch.c Restore preemption of idle threads. 2005-06-10 03:00:29 +00:00
kern_sx.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_synch.c Use low level constructs borrowed from interrupt threads to wait for 2005-05-23 23:01:53 +00:00
kern_syscalls.c Do a pass over all modules in the kernel and make them return EOPNOTSUPP 2004-07-15 08:26:07 +00:00
kern_sysctl.c Make another bunch of SYSCTL_NODEs static 2005-02-10 12:16:08 +00:00
kern_tc.c s/ENOTTY/ENOIOCTL/ 2005-03-26 20:04:28 +00:00
kern_thr.c Add new syscall thr_new to create thread in atomic, it will 2005-04-23 02:36:07 +00:00
kern_thread.c Remove sleep queue hack, it is no longer needed with current sleep queue. 2005-05-27 04:27:22 +00:00
kern_time.c Implement kern_adjtime(), kern_readv(), kern_sched_rr_get_interval(), 2005-03-31 22:51:18 +00:00
kern_timeout.c When processing a timeout() callout and returning it to the free 2005-02-11 00:14:00 +00:00
kern_umtx.c Allocate umtx_q from heap instead of stack, this avoids 2005-03-05 09:15:03 +00:00
kern_uuid.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_xxx.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
ksched.c /* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00
link_elf_obj.c Add support for completing the installation of ELF relocatable 2004-08-29 01:21:51 +00:00
link_elf.c Normalize the VM wiring done with SPARSE_MAPPING: check for errors, and 2004-08-09 18:46:13 +00:00
linker_if.m /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
Make.tags.inc
Makefile
makesyscalls.sh Introduce a new field in the syscalls.master file format to hold the 2005-05-30 15:09:18 +00:00
md4c.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
md5c.c MD5Pad() should never have been exposed. 2005-02-10 12:20:42 +00:00
p1003_1b.c Actually commit the code for kern_sched_get_rr_interval(). 2005-03-31 22:54:48 +00:00
posix4_mib.c Back when VOP_* was introduced, we did not have new-style struct 2004-12-01 23:16:38 +00:00
sched_4bsd.c Lots of whitespace cleanup. 2005-06-09 19:43:08 +00:00
sched_ule.c - Fix the case where we're not preempting but there is already a newtd 2005-06-07 02:59:16 +00:00
subr_acl_posix1e.c Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is 2004-07-26 07:24:04 +00:00
subr_autoconf.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_blist.c Move the definitions of SWAPBLK_NONE and SWAPBLK_MASK from vm_page.h to 2004-06-04 04:03:26 +00:00
subr_bus.c Simplify the code a bit after the bzero(). 2005-06-09 05:50:01 +00:00
subr_clist.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_clock.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_devstat.c - Remove two mtx_asserts that can incorrectly trigger if 2005-05-03 10:58:05 +00:00
subr_disk.c - Fix insertions of bios which represent data earlier than anything else 2005-06-15 23:32:07 +00:00
subr_eventhandler.c eliminate potential null deref 2005-02-23 19:32:29 +00:00
subr_hints.c Don't set ret_namelen and ret_resnamelen in res_find() unless both the 2005-03-24 21:20:25 +00:00
subr_kdb.c Implement an alternate method to stop CPUs when entering DDB. Normally we use 2005-04-30 20:01:00 +00:00
subr_kobj.c
subr_log.c Use dynamic major number allocation. 2005-02-27 22:02:03 +00:00
subr_mbpool.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_mchain.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_module.c
subr_msgbuf.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_param.c Increase default HZ for sparc64 to 1000. 2005-04-16 15:07:41 +00:00
subr_pcpu.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_power.c
subr_prf.c Make "show msgbuf" use the pager instead of blasting the whole thing out. 2005-06-06 22:18:32 +00:00
subr_prof.c netchild's mega-patch to isolate compiler dependencies into a central 2005-03-02 21:33:29 +00:00
subr_rman.c If we are going to 2005-05-06 02:50:00 +00:00
subr_rtc.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_sbuf.c Make a bunch of malloc types static. 2005-02-10 12:02:37 +00:00
subr_scanf.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
subr_sleepqueue.c Remove thread_upcall_check, it was used to avoid race bug in earlier 2005-05-27 15:57:27 +00:00
subr_smp.c Implement an alternate method to stop CPUs when entering DDB. Normally we use 2005-04-30 20:01:00 +00:00
subr_taskqueue.c o enable shutdown of taskqueue threads; the thread servicing the queue checks 2005-05-01 00:38:11 +00:00
subr_trap.c - Rev 1.83 of kern_lock.c fixes the td_locks assert, reenable it here. 2005-03-28 12:52:46 +00:00
subr_turnstile.c Make a bunch of malloc types static. 2005-02-10 12:02:37 +00:00
subr_unit.c Remove debugging printfs. 2005-03-14 06:51:29 +00:00
subr_witness.c After some input from bde@ and rereading the datasheet use a MTX_SPIN 2005-06-04 23:24:50 +00:00
sys_generic.c Implement kern_adjtime(), kern_readv(), kern_sched_rr_get_interval(), 2005-03-31 22:51:18 +00:00
sys_pipe.c Rearrange the kninit calls for both directions of a pipe so that 2005-01-17 07:56:28 +00:00
sys_process.c Add missing cases for PT_SYSCALL. 2005-03-18 21:22:28 +00:00
sys_socket.c Introduce three additional MAC Framework and MAC Policy entry points to 2005-04-16 18:46:29 +00:00
syscalls.c Rebuild generated system call definition files following the addition of 2005-05-30 15:20:21 +00:00
syscalls.master Introduce a new field in the syscalls.master file format to hold the 2005-05-30 15:09:18 +00:00
sysv_ipc.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
sysv_msg.c Add much needed descriptions for a number of the IPC related sysctl OIDs. 2005-02-12 01:22:39 +00:00
sysv_sem.c Gratuitous renaming of four System V Semaphore MAC Framework entry 2005-06-07 05:03:28 +00:00
sysv_shm.c Actually use the iterating variable in the for loop when trying to avoid 2005-05-12 20:04:48 +00:00
tty_compat.c Put the pre FreeBSD-2.x tty compat code under BURN_BRIDGES. 2004-06-21 22:57:16 +00:00
tty_conf.c Preparation commit for the tty cleanups that will follow in the near 2004-07-15 20:47:41 +00:00
tty_cons.c Use dynamic major number allocation for /dev/console, there is no 2005-02-27 21:52:42 +00:00
tty_pty.c Explicitly hold a reference to the cdev we have just cloned. This 2005-03-31 12:19:44 +00:00
tty_subr.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
tty_tty.c Explicitly hold a reference to the cdev we have just cloned. This 2005-03-31 12:19:44 +00:00
tty.c According to the comment in struct tty, t_modem is optional; hence we should 2005-04-13 13:56:17 +00:00
uipc_accf.c o setsockopt(2) cannot remove accept filter. [1] 2005-06-11 11:59:48 +00:00
uipc_cow.c Allow sends sent from non page-aligned userspace addresses to be 2005-06-05 17:13:23 +00:00
uipc_domain.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_mbuf2.c Make a bunch of malloc types static. 2005-02-10 12:02:37 +00:00
uipc_mbuf.c Change m_uiotombuf so it will accept offset at which data should be copied 2005-05-04 18:55:03 +00:00
uipc_proto.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
uipc_sem.c In sem_forkhook(), don't attempt to generate a copy of the process semaphore 2005-06-08 07:29:22 +00:00
uipc_sockbuf.c In the current world order, each socket has two mutexes: a mutex 2005-05-27 17:16:43 +00:00
uipc_socket2.c In the current world order, each socket has two mutexes: a mutex 2005-05-27 17:16:43 +00:00
uipc_socket.c Stop embedding struct ifnet at the top of driver softcs. Instead the 2005-06-10 16:49:24 +00:00
uipc_syscalls.c Change m_uiotombuf so it will accept offset at which data should be copied 2005-05-04 18:55:03 +00:00
uipc_usrreq.c Fix two issues which were missed in FreeBSD-SA-05:08.kmem. 2005-05-07 00:41:36 +00:00
vfs_acl.c Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is 2004-07-26 07:24:04 +00:00
vfs_aio.c In lio_listio(2) change jobref from an int to a long so that 2005-06-07 05:28:21 +00:00
vfs_bio.c - Add and enhance asserts related to the wrong bufobj panic. 2005-06-14 20:32:27 +00:00
vfs_cache.c - Clear v_dd in cache_zap() instead of cache_purge() as cache_purge() may 2005-06-13 05:59:59 +00:00
vfs_cluster.c Revert revision 1.164: pmap_qremove() does not require protection by 2005-05-14 05:09:11 +00:00
vfs_default.c - Add and enhance asserts related to the wrong bufobj panic. 2005-06-14 20:32:27 +00:00
vfs_export.c Handle theoretical case of vfs_export being called with both MNT_DELEXPORT and 2005-05-11 18:25:42 +00:00
vfs_extattr.c - Remove vnode lock asserts at the end of vfs syscalls. These asserts were 2005-06-14 01:14:40 +00:00
vfs_hash.c Fix bug in vfs_hash_rehash(): use correct bucket. This only affected 2005-04-07 07:54:08 +00:00
vfs_init.c Remove VFS_START(). Its original purpose involved the mfs filesystem, 2005-02-20 23:02:20 +00:00
vfs_lookup.c - Remove a debugging printf that slipped in. 2005-04-13 23:36:28 +00:00
vfs_mount.c devfs_first() return value isn't used, remove it. 2005-05-18 22:05:12 +00:00
vfs_subr.c - Change holdcnt use around vnode recycling. We now always keep a holdcnt 2005-06-16 04:41:42 +00:00
vfs_syscalls.c - Remove vnode lock asserts at the end of vfs syscalls. These asserts were 2005-06-14 01:14:40 +00:00
vfs_vnops.c - Remove vnode lock asserts at the end of vfs syscalls. These asserts were 2005-06-14 01:14:40 +00:00
vnode_if.src Allow EVFILT_VNODE events to work on every filesystem type, not just 2005-06-09 20:20:31 +00:00