correct indentation

no functional change, found by smatch warnings
ok miod@ bluhm@

Stop setting d_bbsize and d_sbsize. Nobody has paid
any attention for some time.

ok otto@ as part of larger diff

primary change: move uvm_vnode out of vnode, keeping only a pointer.
objective: vnode.h doesn't include uvm_extern.h anymore.
followup changes: include uvm_extern.h or lock.h where necessary.
ok and

primary change: move uvm_vnode out of vnode, keeping only a pointer.
objective: vnode.h doesn't include uvm_extern.h anymore.
followup changes: include uvm_extern.h or lock.h where necessary.
ok and help from deraadt

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use siphash for key lookups in all the filesystem hashes.

ok deraadt@ tedu@

include sys/unistd.h where needed instead of indirect reliance. ok jsg

Use 'CLR(<buf>->b_flags, B_READ | B_WRITE | B_DONE)' regardless of
what the previous IO was. Less chance of copy and paste errors.
Suggested by miod@.

In days of yore one could arbitrarily whack buffer flags. Those days
are past. Use CLR() and SET() to modify necessary flags while leaving
the flags used by the buffer cache in peace.

Should make bu

In days of yore one could arbitrarily whack buffer flags. Those days
are past. Use CLR() and SET() to modify necessary flags while leaving
the flags used by the buffer cache in peace.

Should make bufcache code much less confused about the state of the
bufs used in reading/writing disklabels. Other such flag abuses no
doubt await a visit.

Errors in original diff found by miod@.

ok beck@ deraadt@

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The only value that d_npartitions should have is MAXPARTITIONS.

Reset b_flags rather than just OR'ing in B_READ and B_RAW when
re-using a buf. Taken from the kern/subr_disk.c readdoslabel()
usage.

Avoids a loop in disksort() caused by trying to queue a buffer th

Reset b_flags rather than just OR'ing in B_READ and B_RAW when
re-using a buf. Taken from the kern/subr_disk.c readdoslabel()
usage.

Avoids a loop in disksort() caused by trying to queue a buffer that is
already in cd->buf_queue. I can now 'disklabel cd0' with "Command
& Conquer 3: Kane's Wrath" in the drive and not hang the system.

Problem reported and fix tested by Jasper Valentij. Thanks!

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Correct cases of mishandling of pending reads and writes to prevent
them going negative - this consists of identifying a number of cases of
IO not going through the buffer cache and marking those buf

Correct cases of mishandling of pending reads and writes to prevent
them going negative - this consists of identifying a number of cases of
IO not going through the buffer cache and marking those buffers with
B_RAW - as well as fixing nfs_bio to show pending writes and reads through
the buffer cache via NFS

still has a problem with mishandling the counters I believe in the
async/sync fallback case where counters stay positive which will be
addressed seperately.

ok tedu@ deraadt@

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Bring biomem diff back into the tree after the nfs_bio.c fix went in.
ok thib beck art

back out biomem diff since it is not right yet. Doing very large
file copies to nfsv2 causes the system to eventually peg the console.
On the console ^T indicates that the load is increasing rapidly

back out biomem diff since it is not right yet. Doing very large
file copies to nfsv2 causes the system to eventually peg the console.
On the console ^T indicates that the load is increasing rapidly, ddb
indicates many calls to getbuf, there is some very slow nfs traffic
making none (or extremely slow) progress. Eventually some machines
seize up entirely.

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Fix buffer cache pending read statistics by ensuring we can identify
biowait() reads that do *not* come from the buffer cache - we use the
B_RAW flag to identify these at art's suggestion - since it

Fix buffer cache pending read statistics by ensuring we can identify
biowait() reads that do *not* come from the buffer cache - we use the
B_RAW flag to identify these at art's suggestion - since it makes sense
and the flag was not being used. this just flags all these buffers with
B_RAW - biodone already ignores returned buffers marked B_RAW.
ok art@

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Buffer cache revamp

1) remove multiple size queues, introduced as a stopgap.
2) decouple pages containing data from their mappings
3) only keep buffers mapped when they actually have to be mapped

Buffer cache revamp

1) remove multiple size queues, introduced as a stopgap.
2) decouple pages containing data from their mappings
3) only keep buffers mapped when they actually have to be mapped
(right now, this is when buffers are B_BUSY)
4) New functions to make a buffer busy, and release the busy flag
(buf_acquire and buf_release)
5) Move high/low water marks and statistics counters into a structure
6) Add a sysctl to retrieve buffer cache statistics

Tested in several variants and beat upon by bob and art for a year. run
accidentally on henning's nfs server for a few months...

ok deraadt@, krw@, art@ - who promises to be around to deal with any fallout

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all disklabels read from the kernel now always contain a total sector
size which is the REAL DISK SIZE. always. if a driver fails to set
this right, please fix it. agreed with otto and krw

use six new macros to access & store the 48-bit disklabel fields related
to size. tested on almost all machines, double checked by miod and krw
next comes the type handling surrounding these values

Don't hold up a vnode for the VAT when a unode is sufficient

Make the mounting process pass a hint to the kernel of where to find the VAT

udf_mnt -> umount and rename fields accordingly

Be consistent about how we name 'struct unode' instances

udf_node -> unode and rename fields accordingly

Rename VTON() to VTOU()

Add VAT support a la UDF 1.50

Fix reading of volume ID

typo