The main benefit is that with the default HZ=1000 nice +19 tasks now get 5
msecs of timeslices, so the ratio of CPU use is linear.  (nice 0 task gets
20 times more CPU time than a nice 19 task.  Prior this change the ratio
was 1:10)

another effect is that nice 0 tasks now get a round 100 msecs of timeslices
(as intended), instead of 102 msecs.

here's a table of old/new timeslice values, for HZ=1000 and 100:

                      HZ=1000         (   HZ=100   )
                    old    new        ( old    new )

        nice -20:   200    200        ( 200    200 )
        nice -19:   195    195        ( 190    190 )
        ...
        nice 0:     102    100        ( 100    100 )
        nice 1:      97     95        (  90     90 )
        nice 2:      92     90        (  90     90 )
        ...
        nice 17:     19     15        (  10     10 )
        nice 18:     14     10        (  10     10 )
        nice 19:     10      5        (  10     10 )

i've tested the patch on x86.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch changes hose_list from a simple linked list to a
"list.h"-style list.  This is in preparation for the runtime
addition/removal of PCI Host Bridges.
Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

On some platforms (notably power5) you can't enable surveillance
(firmware/service processor watchdog) from the kernel - you have to do
it in the firmware.

This patch changes enable_surveillance() to make the message that is
printed in this situation more informative.  Additionaly, the rtas_call
was changed to rtas_set_indicator so as to avoid having to handle
RTAS_BUSY returns.
Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

into ppc970.osdl.org:/home/torvalds/v2.6/linux

The code doesn't actually _care_ about 32/64-bit issues,
only about F_SETLK vs F_SETLKW, and the F_SETLK64 doesn't
exist except as a compatibility thing on 64-bit architectures
(since the regular one already _is_ 64-bit, of course).

into fys.uio.no:/home/linux/bitkeeper/nfsclient-2.6

   server are not allowed to be interrupted as that may result in the
   client and server disagreeing.

   recall ability.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   NFS4ERR_CB_PATH_DOWN error.

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

into fys.uio.no:/home/linux/bitkeeper/work/nfsclient-2.6

into fys.uio.no:/home/linux/bitkeeper/nfsclient-2.6

   rather than an inode argument. Fix up nfs_instantiate() and
   _nfs4_do_open to use this since doing a new lookup might be racy.

   NFS4ERR_DELAY on the GETATTR call.

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   that hangs off filp->private_data. As a side effect, this also
   cleans up the NFSv4 private file state info.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   operations by using a per-server read/write semaphore.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   NFS4ERR_DELAY properly.
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

into fys.uio.no:/home/linux/bitkeeper/nfsclient-2.6

   call allows for the client to request that the mtime and/or atime
   of an inode be set to the current server time, the given (client)
   time, or not changed.  The set-to-current-server value is used
   when you run "touch file" on the client.

The NFSv2 RFC defines no such encoding for the sattr structure. 
   However Solaris and Irix machine obey a convention where passing
   the invalid value mtime.useconds=1000000 means "set both mtime and
   atime to the current server time".  The convention is documented
   in the book "NFS Illustrated" by Brent Callaghan.  The patch below
   implements this convention for the Linux client and server (hence
   multiple To:s).
Signed-off-by: Greg Banks <gnb@sgi.com>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   listed as "the newer version ... of the NFS protocol". Obviously
   both can't be the newer version at the same time, so here's a
   patch to correct the text in such a way that only v4 is listed as
   the newer version. Patch is against 2.6.7-rc3 - please consider
   including it.
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   file handle container, there is no longer any need to clear the
   file handle container before copying in a file handle.  This
   allows us to remove a 128 byte memset() from several hot paths.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   store 128 bytes, usually NFS servers don't use file handles that
   are more than 32 bytes in size.  This patch creates an efficient
   mechanism for comparing file handles that ignores the unused bytes
   in a file handle.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   direct I/O support for NFS files.  The 2.4 VFS O_DIRECT logic was
   block based, thus the NFS client had to provide a minimum
   allowable blocksize for O_DIRECT reads and writes on NFS files. 
   For various reasons we chose 512 bytes. In 2.6, there is no
   requirement for a minimum blocksize.  NFS O_DIRECT reads and
   writes can go to any byte at any offset in a file.  Thus we revert
   the blocksize setting for NFS file systems to the previous
   behavior, which was to advertise the "wsize" setting as the
   optimal I/O block size.  This improves the performance of
   applications like 'cp' which use this value as their transfer
   size.

This patch also exposes the server's reported disk block size in the
   f_frsize of the vfsstat structure.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   request. Get rid of nfs_put_super.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   a heavy read and write workload on one mount point from
   interfering with workloads on other mount points.

Note that there is still some serialization due to the big kernel
   lock.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>

   why we shouldn't be slightly stricter here, so I'm just going to
   keep sending this until I'm told to stop.... Make sure that
   unmapped errors are approximately in the range of defined NFS4
   errors.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <trond.myklebust@fys.uio.no>