Use the proc mtx to prevent simultaneous changes to p_aioinfo.

Eliminate unnecessary calls to wakeup(); no one sleeps on &aio_freeproc.

Eliminate an unused flag, AIOP_SCHED; it's cleared but never set.

Eliminate aio_activeproc; it's unused.

Eliminate aio_bufjobs; it's unused.

- Acquire Giant in AIO's iodone routine. VFS will no longer do it for us
soon.

Sponsored by: Isilon Systems, Inc.

fix aio+kq... I've been running ambrisko's test program for much longer
w/o problems than I was before... This simply brings back the knote_delete
as knlist_delete which will also drop the knote's,

fix aio+kq... I've been running ambrisko's test program for much longer
w/o problems than I was before... This simply brings back the knote_delete
as knlist_delete which will also drop the knote's, instead of just clearing
the list and seeing _ONESHOT...

Fix a race where if a note was _INFLUX and _DETACHED, it could end up being
modified... whoopse..

MFC after: 1 week
Prodded by: ambrisko and dwhite

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Make a SYSCTL_NODE static

/* -> /*- for copyright notices, minor format tweaks as necessary

Remove buf->b_dev field.

Give dev_strategy() an explict cdev argument in preparation for removing
buf->b-dev.

Put a bio between the buf passed to dev_strategy() and the device driver
strategy routine in order to not clobber

Give dev_strategy() an explict cdev argument in preparation for removing
buf->b-dev.

Put a bio between the buf passed to dev_strategy() and the device driver
strategy routine in order to not clobber fields in the buf.

Assert copyright on vfs_bio.c and update copyright message to canonical
text. There is no legal difference between John Dysons two-clause
abbreviated BSD license and the canonical text.

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Put the I/O block size in bufobj->bo_bsize.

We keep si_bsize_phys around for now as that is the simplest way to pull
the number out of disk device drivers in devfs_open(). The correct solution
woul

Put the I/O block size in bufobj->bo_bsize.

We keep si_bsize_phys around for now as that is the simplest way to pull
the number out of disk device drivers in devfs_open(). The correct solution
would be to do an ioctl(DIOCGSECTORSIZE), but the point is probably mooth
when filesystems sit on GEOM, so don't bother for now.

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cover soreadable and sowriteable with the corresponding socketbuffer locks.

Eliminate DEV_STRATEGY() macro: call dev_strategy() directly.

Make dev_strategy() handle errors and departing devices properly.

Tag AIO as requiring Giant over the network stack using
NET_NEEDS_GIANT().

RELENG_5 candidate.

Add locking to the kqueue subsystem. This also makes the kqueue subsystem
a more complete subsystem, and removes the knowlege of how things are
implemented from the drivers. Include locking around

Add locking to the kqueue subsystem. This also makes the kqueue subsystem
a more complete subsystem, and removes the knowlege of how things are
implemented from the drivers. Include locking around filter ops, so a
module like aio will know when not to be unloaded if there are outstanding
knotes using it's filter ops.

Currently, it uses the MTX_DUPOK even though it is not always safe to
aquire duplicate locks. Witness currently doesn't support the ability
to discover if a dup lock is ok (in some cases).

Reviewed by: green, rwatson (both earlier versions)

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clean up whitespace...

- Use atomic ops for updating the vmspace's refcnt and exitingcnt.
- Push down Giant into shmexit(). (Giant is acquired only if the vmspace
contains shm segments.)
- Eliminate the acquisition o

- Use atomic ops for updating the vmspace's refcnt and exitingcnt.
- Push down Giant into shmexit(). (Giant is acquired only if the vmspace
contains shm segments.)
- Eliminate the acquisition of Giant from proc_rwmem().
- Reduce the scope of Giant in exit1(), uncovering the destruction of the
address space.

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Merge additional socket buffer locking from rwatson_netperf:

- Lock down low hanging fruit use of sb_flags with socket buffer
lock.

- Lock down low hanging fruit use of so_state with socket lock.

Merge additional socket buffer locking from rwatson_netperf:

- Lock down low hanging fruit use of sb_flags with socket buffer
lock.

- Lock down low hanging fruit use of so_state with socket lock.

- Lock down low hanging fruit use of so_options.

- Lock down low-hanging fruit use of sb_lowwat and sb_hiwat with
socket buffer lock.

- Annotate situations in which we unlock the socket lock and then
grab the receive socket buffer lock, which are currently actually
the same lock. Depending on how we want to play our cards, we
may want to coallesce these lock uses to reduce overhead.

- Convert a if()->panic() into a KASSERT relating to so_state in
soaccept().

- Remove a number of splnet()/splx() references.

More complex merging of socket and socket buffer locking to
follow.

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Add missing #include <sys/module.h>

Make the process_exit eventhandler run without Giant. Add Giant hooks
in the two consumers that need it.. processes using AIO and netncp.
Update docs. Say that process_exec is called with Giant, bu

Make the process_exit eventhandler run without Giant. Add Giant hooks
in the two consumers that need it.. processes using AIO and netncp.
Update docs. Say that process_exec is called with Giant, but not to
depend on it. All our consumers can handle it without Giant.

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Send B_PHYS out to pasture, it no longer serves any function.

don't allow reading from files that haven't been open'd for reading.

We need to initialize bp->b_offset and bp->b_iooffset
becuase bp->b_blkno is ignored now.

Fix asynchronous physio breakage introduced in rev 1.163.
We cannnot use bp->b_caller2 because DEV_STRATEGY will overwrite it.

Add a f_vnode field to struct file.

Several of the subtypes have an associated vnode which is used for
stuff like the f*() functions.

By giving the vnode a speparate field, a number of checks for t

Add a f_vnode field to struct file.

Several of the subtypes have an associated vnode which is used for
stuff like the f*() functions.

By giving the vnode a speparate field, a number of checks for the specific
subtype can be replaced simply with a check for f_vnode != NULL, and
we can later free f_data up to subtype specific use.

At this point in time, f_data still points to the vnode, so any code I
might have overlooked will still work.

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