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dillon a179ee09ab This patch implements O_DIRECT about 80% of the way. It takes a patchset 
Tor created a while ago, removes the raw I/O piece (that has cache coherency
problems), and adds a buffer cache / VM freeing piece.

Essentially this patch causes O_DIRECT I/O to not be left in the cache, but
does not prevent it from going through the cache, hence the 80%.  For
the last 20% we need a method by which the I/O can be issued directly to
buffer supplied by the user process and bypass the buffer cache entirely,
but still maintain cache coherency.

I also have the code working under -stable but the changes made to sys/file.h
may not be MFCable, so an MFC is not on the table yet.

Submitted by:	tegge, dillon
2001-05-24 07:22:27 +00:00
..
bus_if.m
Alter the return value and arguments of the GET_RESOURCE_LIST bus method.
2000-11-28 06:49:15 +00:00
device_if.m
* Factor out the object system from new-bus so that it can be used by
2000-04-08 14:17:18 +00:00
genassym.sh
Improve kernel bootstrapping:
2001-01-28 06:39:56 +00:00
gensetdefs.pl
Generate useful error messages.
2001-04-13 09:37:25 +00:00
imgact_aout.c
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
imgact_elf.c
Lock the VM while twiddling the vmspace.
2001-05-23 22:05:08 +00:00
imgact_gzip.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
imgact_shell.c
Fix #! script exec under linux emulation. If a script is exec'd from a
2000-04-26 20:58:40 +00:00
inflate.c
Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
1999-12-29 05:07:58 +00:00
init_main.c
- Lock the VM when initializing the vmspace for proc0.
2001-05-23 22:06:47 +00:00
init_sysent.c
Regen syscalls that were made mpsafe via vm_mtx
2001-05-19 01:37:12 +00:00
kern_acct.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_acl.c
o As part of the move to not maintaining copies of the vnode owning uid
2001-04-29 19:53:50 +00:00
kern_cap.c
Remove unneeded #include <sys/proc.h> lines.
2000-10-29 13:57:19 +00:00
kern_clock.c
Remove unneeded includes of sys/ipl.h and machine/ipl.h.
2001-05-15 23:22:29 +00:00
kern_condvar.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_conf.c
Call strlen() once instead of twice.
2001-04-14 21:33:58 +00:00
kern_descrip.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_environment.c
Previous commit changing SYSCTL_HANDLER_ARGS violated KNF.
2000-07-04 11:25:35 +00:00
kern_event.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_exec.c
Axe unneeded spl()'s.
2001-05-21 18:30:50 +00:00
kern_exit.c
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
kern_fork.c
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
kern_idle.c
- Split out the support for per-CPU data from the SMP code. UP kernels
2001-05-10 17:45:49 +00:00
kern_intr.c
- Remove the global ithread_list_lock spin lock in favor of per-ithread
2001-05-17 22:43:26 +00:00
kern_jail.c
o Move per-process jail pointer (p->pr_prison) to inside of the subject
2001-02-21 06:39:57 +00:00
kern_kthread.c
Convert the allproc and proctree locks from lockmgr locks to sx locks.
2001-03-28 11:52:56 +00:00
kern_ktr.c
Switch from save/disable/restore_intr() to critical_enter/exit().
2001-03-28 03:06:10 +00:00
kern_ktrace.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_linker.c
o Actually extract version of interface and store it along with the name.
2001-03-22 08:58:45 +00:00
kern_lock.c
Instead of asserting that a mutex is not still locked after unlocking it,
2001-04-28 12:11:01 +00:00
kern_lockf.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_malloc.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_mib.c
Overhaul of the SMP code. Several portions of the SMP kernel support have
2001-04-27 19:28:25 +00:00
kern_module.c
Mechanical change to use <sys/queue.h> macro API instead of
2001-02-04 13:13:25 +00:00
kern_mutex.c
- Move state about lock objects out of struct lock_object and into a new
2001-05-04 17:15:16 +00:00
kern_ntptime.c
Update to the 2001-04-02 version of the nanokernel code from Dave Mills.
2001-04-16 13:05:05 +00:00
kern_physio.c
Separate the struct bio related stuff out of <sys/buf.h> into
2000-05-05 09:59:14 +00:00
kern_proc.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_prot.c
o Modify access control checks in p_candebug() such that the policy is as
2001-05-17 21:48:44 +00:00
kern_random.c
This patchset fixes a large number of file descriptor race conditions.
2000-11-18 21:01:04 +00:00
kern_resource.c
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
kern_shutdown.c
Revert consequences of changes to mount.h, part 2.
2001-04-29 02:45:39 +00:00
kern_sig.c
- Remove unneeded include of sys/ipl.h.
2001-05-15 23:13:58 +00:00
kern_subr.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_switch.c
Catch up to header include changes:
2001-03-28 09:17:56 +00:00
kern_sx.c
- Move state about lock objects out of struct lock_object and into a new
2001-05-04 17:15:16 +00:00
kern_synch.c
Add in assertions to ensure that we always call msleep or mawait with
2001-05-23 19:38:26 +00:00
kern_syscalls.c
sysvipc loadable.
2000-12-01 08:57:47 +00:00
kern_sysctl.c
Add convenience function kernel_sysctlbyname() for kernel consumers,
2001-05-19 05:45:55 +00:00
kern_tc.c
Remove a bogus #ifdef KTR stanza.
2001-01-01 23:09:53 +00:00
kern_time.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
kern_timeout.c
Catch up to header include changes:
2001-03-28 09:17:56 +00:00
kern_xxx.c
This is kind of a hack, but it should work. Currently, world is broken
2001-03-24 04:40:49 +00:00
ksched.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
link_aout.c
Manually add an extra _ to _DYNAMIC since it is provided by ld, not gcc.
2001-02-25 07:25:05 +00:00
link_elf_obj.c
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
link_elf.c
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
linker_if.m
First round implementation of a fine grain enhanced module to module
2000-04-29 13:19:31 +00:00
Make.tags.inc
- FDESC, FIFO, NULL, PORTAL, PROC, UMAP and UNION file
2001-05-23 09:42:29 +00:00
Makefile
- FDESC, FIFO, NULL, PORTAL, PROC, UMAP and UNION file
2001-05-23 09:42:29 +00:00
makeobjops.pl
Use getopt instead of a home grown one
2001-04-07 20:51:24 +00:00
makesyscalls.sh
Add reserved lkmressys keyword. I swear, this script will die the
2000-12-01 08:47:54 +00:00
md4c.c
Import kernel part of SMB/CIFS requester.
2001-04-10 07:59:06 +00:00
md5c.c
Add ia64 support.
2000-09-29 13:36:47 +00:00
p1003_1b.c
o First step in cleaning up authorization code for the posix4
2001-05-06 16:15:42 +00:00
posix4_mib.c
Add $FreeBSD$.
2000-04-22 15:13:06 +00:00
subr_acl_posix1e.c
o As part of the move to not maintaining copies of the vnode owning uid
2001-04-29 19:53:50 +00:00
subr_autoconf.c
Back out the previous change to the queue(3) interface.
2000-05-26 02:09:24 +00:00
subr_blist.c
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
subr_bus.c
Unset the devclass if the attach fails and the devclass was not set to
2001-01-08 22:16:26 +00:00
subr_clist.c
Make cblock_alloc_cblocks() spell its own name
2001-03-27 10:21:26 +00:00
subr_devstat.c
Another round of the <sys/queue.h> FOREACH transmogriffer.
2001-02-04 16:08:18 +00:00
subr_disk.c
Always initialize bio_resid from bio_bcount in the disk mini-layer so
2001-05-08 08:24:54 +00:00
subr_disklabel.c
A bit of sanity-checking in bioqdisksort(): panic if we recurse.
2001-01-14 18:48:42 +00:00
subr_diskmbr.c
Make diskerr() always log with printf.
2000-11-26 19:29:15 +00:00
subr_diskslice.c
Add a new ioctl for doing virgin disklabels.
2000-10-31 07:05:40 +00:00
subr_eventhandler.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
subr_kobj.c
Convert more malloc+bzero to malloc+M_ZERO.
2000-12-08 21:51:06 +00:00
subr_log.c
syslogd gets kernel log messages only once every 30 seconds or
2001-05-23 19:02:50 +00:00
subr_mchain.c
Remove superfluous m_pkthdr.rcv_if = NULL assignment following
2001-02-25 06:33:50 +00:00
subr_module.c
Preceed/preceeding are not english words. Use precede and preceding.
2001-02-18 10:43:53 +00:00
subr_param.c
Remove unneeded <stddef.h> #includes.
2000-10-29 16:57:42 +00:00
subr_pcpu.c
- Split out the support for per-CPU data from the SMP code. UP kernels
2001-05-10 17:45:49 +00:00
subr_prf.c
Use PCPU_GET, PCPU_PTR and PCPU_SET to access all per-cpu variables
2001-01-10 04:43:51 +00:00
subr_prof.c
Remove unneeded includes of sys/ipl.h and machine/ipl.h.
2001-05-15 23:22:29 +00:00
subr_rman.c
Change and clean the mutex lock interface.
2001-02-09 06:11:45 +00:00
subr_sbuf.c
Rewrite of the CAM error recovery code.
2001-03-27 05:45:52 +00:00
subr_scanf.c
Change the prototype of the strto* routines to make the second
1999-11-24 01:03:08 +00:00
subr_smp.c
- Split out the support for per-CPU data from the SMP code. UP kernels
2001-05-10 17:45:49 +00:00
subr_taskqueue.c
remove include of ipl.h because it no longer exists
2001-05-16 02:52:06 +00:00
subr_trap.c
Don't acquire Giant just to call trap_fatal(), we are about to panic
2001-05-23 22:58:09 +00:00
subr_turnstile.c
- Move state about lock objects out of struct lock_object and into a new
2001-05-04 17:15:16 +00:00
subr_witness.c
- Don't panic on a try lock operation for a sleep lock if we hold a spin
2001-05-17 22:44:56 +00:00
subr_xxx.c
Extend kqueue down to the device layer.
2001-02-15 16:34:11 +00:00
sys_generic.c
Back out scanning file descriptors with holding a process lock.
2001-05-15 10:19:57 +00:00
sys_pipe.c
aquire vm_mutex a little bit earlier to protect a pmap call.
2001-05-23 10:26:36 +00:00
sys_process.c
- FDESC, FIFO, NULL, PORTAL, PROC, UMAP and UNION file
2001-05-23 09:42:29 +00:00
sys_socket.c
Extend kqueue down to the device layer.
2001-02-15 16:34:11 +00:00
syscalls.c
Regen syscalls that were made mpsafe via vm_mtx
2001-05-19 01:37:12 +00:00
syscalls.master
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
sysv_ipc.c
sysvipc loadable.
2000-12-01 08:57:47 +00:00
sysv_msg.c
o Move per-process jail pointer (p->pr_prison) to inside of the subject
2001-02-21 06:39:57 +00:00
sysv_sem.c
o Move per-process jail pointer (p->pr_prison) to inside of the subject
2001-02-21 06:39:57 +00:00
sysv_shm.c
Correct style bugs with regards to long lines and comments.
2001-05-23 23:38:05 +00:00
tty_compat.c
…
tty_conf.c
Don't refer to TABLDISC in the comments here.
2000-01-30 10:14:13 +00:00
tty_cons.c
Send the remains (such as I have located) of "block major numbers" to
2001-03-26 12:41:29 +00:00
tty_pty.c
Send the remains (such as I have located) of "block major numbers" to
2001-03-26 12:41:29 +00:00
tty_snoop.c
Convert this driver to (ab?)use line disciplines to get the input it
2001-05-22 22:13:14 +00:00
tty_subr.c
Make cblock_alloc_cblocks() spell its own name
2001-03-27 10:21:26 +00:00
tty_tty.c
Support /dev/ctty again
2001-05-15 18:12:38 +00:00
tty.c
Unifdef DEV_SNP; snp(4) no longer requires these ugly hacks.
2001-05-22 22:16:18 +00:00
uipc_accf.c
Remove unneeded #include <sys/proc.h> lines.
2000-10-29 13:57:19 +00:00
uipc_domain.c
Use callout_reset instead of timeout(9). Most callouts are statically
2000-11-27 22:52:31 +00:00
uipc_mbuf2.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
uipc_mbuf.c
Increment mbstat.m_mpfail, not mbstat.m_mcfail, when m_pullup() fails.
2001-05-23 20:44:54 +00:00
uipc_proto.c
…
uipc_sockbuf.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
uipc_socket2.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
uipc_socket.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
uipc_syscalls.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
uipc_usrreq.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
vfs_acl.c
o As part of the move to not maintaining copies of the vnode owning uid
2001-04-29 19:53:50 +00:00
vfs_aio.c
Check validity of signal callback requested via aio routines.
2001-04-18 22:18:39 +00:00
vfs_bio.c
This patch implements O_DIRECT about 80% of the way. It takes a patchset
2001-05-24 07:22:27 +00:00
vfs_cache.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
vfs_cluster.c
This patch implements O_DIRECT about 80% of the way. It takes a patchset
2001-05-24 07:22:27 +00:00
vfs_conf.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
vfs_default.c
Don't release the vm lock just to turn around and grab it again.
2001-05-23 19:51:12 +00:00
vfs_export.c
vfs_subr.c is getting rather fat. The underlying repocopy and this
2001-04-26 20:47:14 +00:00
vfs_extattr.c
Don't release Giant around vm_oject_page_clean() in fsync() as the pager
2001-05-23 22:55:13 +00:00
vfs_init.c
Revert consequences of changes to mount.h, part 2.
2001-04-29 02:45:39 +00:00
vfs_lookup.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
vfs_mount.c
Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
2001-05-01 08:13:21 +00:00
vfs_subr.c
Introduce a global lock for the vm subsystem (vm_mtx).
2001-05-19 01:28:09 +00:00
vfs_syscalls.c
Don't release Giant around vm_oject_page_clean() in fsync() as the pager
2001-05-23 22:55:13 +00:00
vfs_vnops.c
This patch implements O_DIRECT about 80% of the way. It takes a patchset
2001-05-24 07:22:27 +00:00
vnode_if.pl
replace calls to non-existant bail() subroutine with calls to
2001-03-23 11:48:50 +00:00
vnode_if.src
VOP_BALLOC was never really a VOP in the first place, so convert it
2001-04-29 12:36:52 +00:00