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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Hold the lock on the containing vm object when calling
vm_page_sleep_if_busy().

Remove vnode->v_bsize. This was a dead-end.

Use VM_ALLOC_NOBUSY to eliminate vm_page_wakeup() calls and the acquisition
and release of the global page queues lock required to make the call.

Remove GIANT_REQUIRED from vm_hold_free_pages(). Al

Use VM_ALLOC_NOBUSY to eliminate vm_page_wakeup() calls and the acquisition
and release of the global page queues lock required to make the call.

Remove GIANT_REQUIRED from vm_hold_free_pages(). All of its VM operations
are properly synchronized.

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Collapse vnode->v_object and buf->b_object into bufobj->bo_object.

Move the buffer method vector (buf->b_op) to the bufobj.

Extend it with a strategy method.

Add bufstrategy() which do the usual VOP_SPECSTRATEGY/VOP_STRATEGY
song and dance.

Rename ibwrite to bufw

Move the buffer method vector (buf->b_op) to the bufobj.

Extend it with a strategy method.

Add bufstrategy() which do the usual VOP_SPECSTRATEGY/VOP_STRATEGY
song and dance.

Rename ibwrite to bufwrite().

Move the two NFS buf_ops to more sensible places, add bufstrategy
to them.

Add inlines for bwrite() and bstrategy() which calls through
buf->b_bufobj->b_ops->b_{write,strategy}().

Replace almost all VOP_STRATEGY()/VOP_SPECSTRATEGY() calls with bstrategy().

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Add b_bufobj to struct buf which eventually will eliminate the need for b_vp.

Initialize b_bufobj for all buffers.

Make incore() and gbincore() take a bufobj instead of a vnode.

Make inmem() local

Add b_bufobj to struct buf which eventually will eliminate the need for b_vp.

Initialize b_bufobj for all buffers.

Make incore() and gbincore() take a bufobj instead of a vnode.

Make inmem() local to vfs_bio.c

Change a lot of VI_[UN]LOCK(bp->b_vp) to BO_[UN]LOCK(bp->b_bufobj)
also VI_MTX() to BO_MTX(),

Make buf_vlist_add() take a bufobj instead of a vnode.

Eliminate other uses of bp->b_vp where bp->b_bufobj will do.

Various minor polishing: remove "register", turn panic into KASSERT,
use new function declarations, TAILQ_FOREACH_SAFE() etc.

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Move the VI_BWAIT flag into no bo_flag element of bufobj and call it BO_WWAIT

Add bufobj_wref(), bufobj_wdrop() and bufobj_wwait() to handle the write
count on a bufobj. Bufobj_wdrop() replaces vwa

Move the VI_BWAIT flag into no bo_flag element of bufobj and call it BO_WWAIT

Add bufobj_wref(), bufobj_wdrop() and bufobj_wwait() to handle the write
count on a bufobj. Bufobj_wdrop() replaces vwakeup().

Use these functions all relevant places except in ffs_softdep.c where
the use if interlocked_sleep() makes this impossible.

Rename b_vnbufs to b_bobufs now that we touch all the relevant files anyway.

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use dev_re[fl]thread() rather than home rolled versions.

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

Make dev_strategy() handle errors and departing devices properly.

Do not refcount the cdevsw, but rather maintain a cdev->si_threadcount
of the number of threads which are inside whatever is behind the
cdevsw for this particular cdev.

Make the device mutex visible

Do not refcount the cdevsw, but rather maintain a cdev->si_threadcount
of the number of threads which are inside whatever is behind the
cdevsw for this particular cdev.

Make the device mutex visible through dev_lock() and dev_unlock().
We may want finer granularity later.

Replace spechash_mtx use with dev_lock()/dev_unlock().

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Remove unused B_WRITEINPROG flag

undent some functions a bit.

stylistic polishing.

Remove the buffercache/vnode side of BIO_DELETE processing in
preparation for integration of p4::phk_bufwork. In the future,
local filesystems will talk to GEOM directly and they will consequently
b

Remove the buffercache/vnode side of BIO_DELETE processing in
preparation for integration of p4::phk_bufwork. In the future,
local filesystems will talk to GEOM directly and they will consequently
be able to issue BIO_DELETE directly. Since the removal of the fla
driver, BIO_DELETE has effectively been a no-op anyway.

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Eliminate unused second argument to reassignbuf() and simplify it
accordingly.

Neuter this warning for now, I think I know the remaining issues.

Remove GIANT_REQUIRED from vmapbuf().

Fix bug introduced in rev 1.434:

When avoiding the zeroing of "bogus_page" when it appears in a buf,
be sure to advance the pointers into the data for successive pages.

The bug caused file corrupti

Fix bug introduced in rev 1.434:

When avoiding the zeroing of "bogus_page" when it appears in a buf,
be sure to advance the pointers into the data for successive pages.

The bug caused file corruption when read(2)ing from a "hole" in a
file where a previous page of the read block had already been faulted
in: fsx tripped up on this pretty quickly. The particular access
pattern is probably pretty unusual, so other applications probably
wouldn't have had problems, but you'd never know.

Reviewed By: alc@

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Make the last commit handle non-phk root devices better.

Consistently use __inline instead of __inline__ as the former is an empty macro
in <sys/cdefs.h> for compilers without support for inline.

Blocksize for I/O should be a property of the vnode and not found by groping
around in the vnodes surroundings when we allocate a block.

Assign a blocksize when we create a vnode, and yell a warning

Blocksize for I/O should be a property of the vnode and not found by groping
around in the vnodes surroundings when we allocate a block.

Assign a blocksize when we create a vnode, and yell a warning (and ignore it)
if we got the wrong size.

Please email all such warnings to me.

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Remove stale comment

Second half of the dev_t cleanup.

The big lines are:
NODEV -> NULL
NOUDEV -> NODEV
udev_t -> dev_t
udev2dev() -> findcdev()

Various minor adjustments including handling of userland access to ke

Second half of the dev_t cleanup.

The big lines are:
NODEV -> NULL
NOUDEV -> NODEV
udev_t -> dev_t
udev2dev() -> findcdev()

Various minor adjustments including handling of userland access to kernel
space struct cdev etc.

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Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.