Patch from Petr Baudis <pasky@ucw.cz>

this patch (against 2.5.59) updates Documentation/kernel-parameters.txt to
the (more-or-less; I certainly missed some parameters) current state of
kernel.  Note also that I will probably send up another update after few
further kernel releases..

We don't need these with self-unplugging queues.

The patch also contains a couple of microopts suggested by Andrea: we
don't need to run sync_page() if the page just came unlocked.

The patch teaches a queue to unplug itself:

a) if is has four requests OR
b) if it has had plugged requests for 3 milliseconds.

These numbers may need to be tuned, although doing so doesn't seem to
make much difference.  10 msecs works OK, so HZ=100 machines will be
fine.

Instrumentation shows that about 5-10% of requests were started due to
the three millisecond timeout (during a kernel compile).  That's
somewhat significant.  It means that the kernel is leaving stuff in the
queue, plugged, for too long.  This testing was with a uniprocessor
preemptible kernel, which is particularly vulnerable to unplug latency
(submit some IO, get preempted before the unplug).

This patch permits the removal of a lot of rather lame unplugging in
page reclaim and in the writeback code, which kicks the queues
(globally!) every four megabytes to get writeback underway.

This patch doesn't use blk_run_queues().  It is able to kick just the
particular queue.

The patch is not expected to make much difference really, except for
AIO.  AIO needs a blk_run_queues() in its io_submit() call.  For each
request.  This means that AIO has to disable plugging altogether,
unless something like this patch does it for it.  It means that AIO
will unplug *all* queues in the machine for every io_submit().  Even
against a socket!

This patch was tested by disabling blk_run_queues() completely.  The
system ran OK.

The 3 milliseconds may be too long.  It's OK for the heavy writeback
code, but AIO may want less.  Or maybe AIO really wants zero (ie:
disable plugging).  If that is so, we need new code paths by which AIO
can communicate the "immediate unplug" information - a global unplug is
not good.


To minimise unplug latency due to user CPU load, this patch gives keventd
`nice -10'.  This is of course completely arbitrary.  Really, I think keventd
should be SCHED_RR/MAX_RT_PRIO-1, as it has been in -aa kernels for ages.

Patch from Chris Mason <mason@suse.com>

The patch below is against 2.5.59, various forms have been floating
around for a while, and Andrew recently included this fixed version in
2.5.55-mm.  The end result is faster reads and writes for reiserfs.

This adds reiserfs support for readpages, along with a support func in
fs/mpage.c to deal with the reiserfs_get_block call sending back up to
date buffers with packed tails copied into them.

Most of the changes are to reiserfs_writepage, which still had many
2.4isms in the way it started io, dealt with errors and handled the bh
state bits.  I've also added an optimization so it only starts
transactions when we need to copy a packed tail into the btree or fill a
hole, instead of any time reiserfs_writepage hits an unmapped buffer.

Patch from Gerd Knorr <kraxel@bytesex.org>

bttv requires CONFIG_SOUND.

into home.transmeta.com:/home/torvalds/v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

into home.transmeta.com:/home/torvalds/v2.5/linux

into kroah.com:/home/greg/linux/BK/pci-hp-2.5

Here's the memory leaks patch for acpiphp_glue.c.

The patch is modeled after your method for creating files for usb. It
makes a single file for pci sysfs files (except for pool, which I haven't
touched yet). It also exposes more pci information to User Space
through sysfs. Finally, it removes the dependence on the proc pci code
for sysfs files.

Fixes problems found by the CHECKER program in the pci hotplug drivers

Moved functions from drivers/hotplug/pci_hotplug_util.c to
drivers/pci/hotplug.c, which is a better place for them.

Relies on sysfs_update_file() to be present in the kernel.

Here is a little patch that remove procfs stuff in pci_hotplug_core.c
Remove /proc entry for pci_hotplug_core.

These were pointed out by "dan carpenter" <error27@email.com>
from his smatch tool.

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Ok, here's my proposed fix, which appears to work with preempt.  I haven't
tested on non-preempt, nor (obviously since its from me) SMP.  However,
I forsee no problems caused by this change.

release_dev() sets filp->private_data to NULL when the tty layer has
done with the file descriptor.  However, it remains on the tty_files
list until __fput completes.

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Add "seqlock" infrastructure for doing low-overhead optimistic reader
locks (writer increments a sequence number, reader verifies that no
writers came in during the critical region, and lots of careful memory
barriers to take care of business).

Make xtime/get_jiffies_64() use this new locking.

Trivial patch from Randy Dunlap <rddunlap@osdl.org> removes some useless
error/retval assignments.

Found by inspection of of the x86_64 gettimeofday.

The problem is that the code always records the maximum value
but it is not reset on the next clock tick.  As written, I see it
keeping the maximum number of microseconds since the last clock tick.

The Stanford Checker identified a memory leak in init/do_mounts.c.

This corrects it.

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Defaulting to building modules together with vmlinux when just doing
"make" or "make all" is only a good choice when "CONFIG_MODULES" is set.

into groveronline.com:/root/bk/linux-acpi

into home.transmeta.com:/home/torvalds/v2.5/linux