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freebsd-dev/sys/kern
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Ian Dowse 4784a46912 Replace the code for reading and writing the kernel message buffer 
with a new implementation that has a mostly reentrant "addchar"
routine, supports multiple message buffers in the kernel, and hides
the implementation details from callers.

The new code uses a kind of sequence number to represend the current
read and write positions in the buffer. This approach (suggested
mainly by bde) permits the read and write pointers to be maintained
separately, which reduces the number of atomic operations that are
required. The "mostly reentrant" above refers to the way that while
it is now always safe to have any number of concurrent writers,
readers could see the message buffer after a writer has advanced
the pointers but before it has witten the new character.

Discussed on:	freebsd-arch
2003-06-22 02:18:31 +00:00
..
bus_if.m Give print_child a default method. 2003-03-25 04:32:52 +00:00
clock_if.m
device_if.m
genassym.sh
imgact_aout.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_elf32.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_elf64.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_elf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_gzip.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_shell.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
inflate.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
init_main.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
init_sysent.c Regen from syscalls.master:1.149, addition of extended attribute 2003-06-04 03:50:20 +00:00
kern_acct.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_acl.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_alq.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_clock.c Rename P_THREADED to P_SA. P_SA means a process is using scheduler 2003-06-15 00:31:24 +00:00
kern_condvar.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_conf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_context.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_descrip.c Don't (re)initialize f_gcflag to zero. 2003-06-20 08:02:30 +00:00
kern_environment.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_event.c Initialize struct fileops with C99 sparse initialization. 2003-06-18 18:16:40 +00:00
kern_exec.c Rename P_THREADED to P_SA. P_SA means a process is using scheduler 2003-06-15 00:31:24 +00:00
kern_exit.c Rename P_THREADED to P_SA. P_SA means a process is using scheduler 2003-06-15 00:31:24 +00:00
kern_fork.c Add a ratelimited message of the form 2003-06-19 05:57:25 +00:00
kern_idle.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_intr.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_jail.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_kse.c cpu_set_upcall_kse needs to access userspace, release schedule lock 2003-06-20 09:12:12 +00:00
kern_kthread.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_ktr.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_ktrace.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_linker.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_lock.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_lockf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_mac.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_malloc.c Don't overflow when calculating vm_kmem_size. This fixes kmem_map 2003-06-11 05:18:59 +00:00
kern_mib.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_module.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_mtxpool.c Style(9). 2003-06-13 19:39:21 +00:00
kern_mutex.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_ntptime.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_physio.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_poll.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_proc.c Drop the proc lock around SYSCTL_OUT in the no-threads case. 2003-06-17 19:14:00 +00:00
kern_prot.c Various cr*() calls believed to be MPSAFE, since the uidinfo 2003-06-15 15:57:42 +00:00
kern_resource.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_sema.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_shutdown.c Don't overwrite the static panicstr buffer for secondary and further 2003-06-15 11:43:00 +00:00
kern_sig.c When a STOP signal is being sent to a process, it is possible all 2003-06-20 03:36:45 +00:00
kern_subr.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_switch.c Rename P_THREADED to P_SA. P_SA means a process is using scheduler 2003-06-15 00:31:24 +00:00
kern_sx.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_synch.c Rename P_THREADED to P_SA. P_SA means a process is using scheduler 2003-06-15 00:31:24 +00:00
kern_syscalls.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_sysctl.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_tc.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_thr.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_thread.c cpu_set_upcall_kse needs to access userspace, release schedule lock 2003-06-20 09:12:12 +00:00
kern_time.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_timeout.c Don't put callout_lock under #ifdef DIAGNOSTIC despite the fact that it 2003-06-20 08:39:04 +00:00
kern_umtx.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_uuid.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_xxx.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
ksched.c Use __FBSDID(). 2003-06-11 06:34:30 +00:00
link_elf_obj.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
link_elf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
linker_if.m
Make.tags.inc
Makefile
makesyscalls.sh - Include umtx.h in files generated by makesyscalls.sh 2003-04-01 01:12:24 +00:00
md4c.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
md5c.c Use le32dec() instead of le32toh() because we are not guaranteed to have 2003-05-05 07:22:35 +00:00
p1003_1b.c Use __FBSDID(). 2003-06-11 06:34:30 +00:00
posix4_mib.c Use __FBSDID(). 2003-06-11 06:34:30 +00:00
sched_4bsd.c Rename P_THREADED to P_SA. P_SA means a process is using scheduler 2003-06-15 00:31:24 +00:00
sched_ule.c - lticks was erroneously being updated in sched_pctcpu(). This was causing 2003-06-21 02:31:49 +00:00
subr_acl_posix1e.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_autoconf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_blist.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_bus.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_clist.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_clock.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_devstat.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_disk.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_eventhandler.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_hints.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_kobj.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_log.c Replace the code for reading and writing the kernel message buffer 2003-06-22 02:18:31 +00:00
subr_mbuf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_mchain.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_module.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_msgbuf.c Replace the code for reading and writing the kernel message buffer 2003-06-22 02:18:31 +00:00
subr_param.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_pcpu.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_power.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_prf.c Replace the code for reading and writing the kernel message buffer 2003-06-22 02:18:31 +00:00
subr_prof.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_rman.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_rtc.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_sbuf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_scanf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_smp.c Document some sysctl variables. 2003-06-12 19:46:51 +00:00
subr_taskqueue.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_trap.c 1. Add code to support bound thread. when blocked, a bound thread never 2003-06-15 12:51:26 +00:00
subr_turnstile.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_witness.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_xxx.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
sys_generic.c Introduce a new flag on a file descriptor: DFLAG_SEEKABLE and use that 2003-06-18 19:53:59 +00:00
sys_pipe.c Initialize struct fileops with C99 sparse initialization. 2003-06-18 18:16:40 +00:00
sys_process.c Add vm object locking. 2003-06-11 06:43:48 +00:00
sys_socket.c Initialize struct fileops with C99 sparse initialization. 2003-06-18 18:16:40 +00:00
syscalls.c Regen from syscalls.master:1.149, addition of extended attribute 2003-06-04 03:50:20 +00:00
syscalls.master Add system calls to explicitly list extended attributes on a 2003-06-04 03:49:31 +00:00
sysv_ipc.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
sysv_msg.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
sysv_sem.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
sysv_shm.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty_compat.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty_conf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty_cons.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty_pty.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty_subr.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty_tty.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty.c Rename P_THREADED to P_SA. P_SA means a process is using scheduler 2003-06-15 00:31:24 +00:00
uipc_accf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_cow.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_domain.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_jumbo.c Lock the vm object when removing a page. 2003-06-11 21:23:04 +00:00
uipc_mbuf2.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_mbuf.c Hide the m_defrag* statistics under MBUF_STRESS_TEST, there seems 2003-06-17 02:34:40 +00:00
uipc_proto.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_sem.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_sockbuf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_socket2.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_socket.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_syscalls.c VOP_GETVOBJECT() wants to be called with the vnode lock held. 2003-06-19 03:55:01 +00:00
uipc_usrreq.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
vfs_acl.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
vfs_aio.c Get rid of the b_spc specialty field in struct buf by using an already 2003-06-16 07:18:39 +00:00
vfs_bio.c Initialize b_saveaddr when we hand out buffers 2003-06-20 08:26:38 +00:00
vfs_cache.c Make the VFS cache use zones instead of malloc(9). This results in a 2003-06-13 08:46:13 +00:00
vfs_cluster.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
vfs_default.c I have not had any reports of trouble for a long time, so remove the 2003-06-15 19:49:14 +00:00
vfs_export.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
vfs_extattr.c Don't (re)initialize f_gcflag to zero. 2003-06-20 08:02:30 +00:00
vfs_init.c Initialize struct vfsops C99-sparsely. 2003-06-12 20:48:38 +00:00
vfs_lookup.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
vfs_mount.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
vfs_subr.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
vfs_syscalls.c Don't (re)initialize f_gcflag to zero. 2003-06-20 08:02:30 +00:00
vfs_vnops.c Introduce a new flag on a file descriptor: DFLAG_SEEKABLE and use that 2003-06-18 19:53:59 +00:00
vnode_if.src Add comment about **vpp being special-cased in vnode_if.awk (1.38) 2003-06-20 12:24:06 +00:00