Record I/O timing statistics

The start time is added to struct dm_io, an existing structure allocated
privately internally within dm and attached to each incoming bio.

We export disk_round_stats() from block/ll_rw_blk.c instead of creating a
private clone.
Signed-off-by: NJun'ichi "Nick" Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Record basic I/O statistics for mapped devices.
Signed-off-by: NKevin Corry <kevcorry@us.ibm.com>
Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Reduce substantially the amount of code using PF_MEMALLOC, as envisaged in the
original FIXME.

If you're using lvm2, for this patch to work correctly you should update to
lvm2 version 2.02.01 or later and device-mapper version 1.02.02 or later.
Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Clean up the code responsible for the on-disk mirror logs by using the
set_le_bit test_le_bit functions of ext2.  That makes the BE machines keep the
bitmap internally in LE order - it does mean you can't use any other type of
operations on the bitmap words but that looks to be OK in this instance.  The
efficiency tradeoff is very minimal as you would expect for something that
ext2 uses.

This allows us to remove bits_to_core(), bits_to_disk() and log->disk_bits.

Also increment the mirror log disk version transparently to avoid sharing with
older kernels that suffered from the 64-bit BE bug.
Signed-off-by: NPatrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Move snapshot metadata loading to happen when the table is created instead of
when the device is resumed.  Writes to the origin device don't trigger
exceptions until each snapshot table becomes active when resume() is called on
each snapshot.

If you're using lvm2, for this patch to work properly you should update to
lvm2 version 2.02.01 or later and device-mapper version 1.02.02 or later.
Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

fs/compat.c: In function `compat_sys_pselect7':
fs/compat.c:1820: warning: passing arg 5 of `compat_core_sys_select' from incompatible pointer type
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

It's not used. Fix the following on alpha-eb66 as a side effect:

In file included from drivers/net/lp486e.c:75:
include/asm/io.h:20:1: warning: "SLOW_DOWN_IO" redefined
drivers/net/lp486e.c:59:1: warning: this is the location of the previous definition
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Make the platform function interrupt functions actually work.  Calls
irq_enable() for the first in the list, and irq_disable() for the last.

Added *func to struct irq_client so the the user can pass just that to
pmf_unregister_irq_client().
Signed-off-by: NBen Collins <bcollins@ubuntu.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Kernel 2.6.16-rc1 broke the ide-scsi driver: ide-scsi loads but fails to
find any devices to bind to.  It also triggers a message "Driver 'ide-scsi'
needs updating - please use bus_type methods" from the driver core.

The IDE core in 2.6.16-rc1 changed the location of an IDE driver's
->probe()/->remove()/->shutdown() methods: they are now in the ide_driver_t
struct not in the gen_driver sub-struct.  drivers/ide/ was updated for this
change but ide-scsi.c wasn't.  Hence the breakage.

This patch repairs ide-scsi and also eliminates the driver core warning.
Signed-off-by: NMikael Pettersson <mikpe@csd.uu.se>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Greg KH <greg@kroah.com>
Acked-by: NBartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

__meminit has overzelously been modified and crept its way into marking
cpuup callbacks as __meminit.
Signed-off-by: NAshok Raj <ashok.raj@intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

In 2.6.16-rc1 there is a small typo introduced by the 'Remove device_node
addrs/n_addr' changes which prevents my Powerbook G4 sound from working:

	Advanced Linux Sound Architecture Driver Version 1.0.11rc2 (Wed Jan 04 08:57:20 2006 UTC).
	snd: can't request rsrc  0 (Sound Control: 0x80000000:80004fff)
	ALSA device list:
	   No soundcards found.

The patch below fixes it.  Of course, the patch fixing the i2c issues
('i2c_smbus_write_i2c_block_data' patch) needs to be applied to in order
for the sound to completly work.
Signed-off-by: NStelian Pop <stelian@popies.net>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

While asynchronous reads mean a performance improvement in most cases, if
the filesystem assumed that reads are synchronous, then async reads may
degrade performance (filesystem may receive reads out of order, which can
confuse it's own readahead logic).

With sshfs a 1.5 to 4 times slowdown can be measured.

There's also a need for userspace filesystems to know whether asynchronous
reads are supported by the kernel or not.

To achive these, negotiate in the INIT request whether async reads will be
used and the maximum readahead value.  Update interface version to 7.6

If userspace uses a version earlier than 7.6, then disable async reads, and
set maximum readahead value to the maximum read size, as done in previous
versions.
Signed-off-by: NMiklos Szeredi <miklos@szeredi.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

An old patch designed to fix http://bugme.osdl.org/show_bug.cgi?id=4497,
"getdents gives empty/random result upon signal".

If smbfs's readdir() is interupted by a signal, smb_readdir() failed to
noticed that and proceeded to treat the unread-into page as valid directory
contents.  Fix that up by handling the -ERESTARTSYS.

Thanks to Stian Skjelstad for reporting and testing.

Cc: Stian Skjelstad <stian@nixia.no>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Move CONFIG_DOUBLEFAULT from the main Kconfig menu (!) into its proper
place: the "Processor Type and features" submenu.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

A recent patch to
   Allow run-time selection of NFS versions to export

meant that NO nfsacl service versions were exported.  This patch restored
that functionality.
Signed-off-by: NAndreas Gruenbacher <agruen@suse.de>
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Here's the follow-up patch which introduces the prototypes for the new
syscalls.  There was also a typo in one of the new symbols.
Signed-off-by: NUlrich Drepper <drepper@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Older pSeries systems with serial ports dont get any console output after
recent changes.  CONFIG_ISA does not make sense for CONFIG_PPC_PSERIES
because it enables lots of old drivers.  Instead, remove the dependency on
CONFIG_ISA from the serial port discovery code.
Signed-off-by: NOlaf Hering <olh@suse.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

We need to use the compat function here.

Pointer out by Heiko Carstens <heiko.carstens@de.ibm.com>

Cc: Andi Kleen <ak@muc.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NChris Wright <chrisw@sous-sol.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Handle more bogus MCFG entries

Some Asus P4 boards seem to have broken MCFG tables with
only a single entry for busses 0-0.  Special case these
and assume they mean all busses can be accessed.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Richard Knutsson <ricknu-0@student.ltu.se> did the original pci_module_init()
cleanups:

    http://marc.theaimsgroup.com/?l=linux-kernel&m=113330872125068&w=2
    http://marc.theaimsgroup.com/?l=linux-kernel&m=113330888507321&w=2

Greg, on it's way upstream, pci_module_init() return sneaked back in for
cyblafb?

    http://marc.theaimsgroup.com/?l=linux-pci&m=113652969209562&w=2
    http://marc.theaimsgroup.com/?l=linux-pci&m=113683930220421&w=2

Remove for good.
Signed-off-by: NArthur Othieno <apgo@patchbomb.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Error checking is scattered through various layers of the dlpar code,
leading to a somewhat opaque code structure. This patch consolidates
error checking in one routine, simplifying the code a tad. There's
also some whitespace cleanup here too.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Minor cleanup. Move structure initializer to bottom of file,
this allows elimination of eyeball-strain-inducing forward
declarations.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Minor cleanup. Add the prefix rpaphp_* to several generic-sounding routines.
Remove rpaphp_remove_slot(), which is a one-liner.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Remove general baroqueness.  The function rpaphp_enable_pci_slot()
has a fairly simple logic structure, once all of the debug printk's
are removed. Its called from only one place, and that place also
has a very simple structure once he printk's are removed.  Merge
the two together.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Remove general baroqueness.  The function rpaphp_unconfig_pci_adapter()
is really just three lines of code, once all the dbg printks are removed.
And its called in only one place. So replace the call by the thre lines.
Also, provide proper semaphore locking in the affected function
disable_slot()
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The function rpaphp_eeh_remove_bus_device() is a dupe of
eeh_remove_bus_device(). Remove it.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Remove general baroqueness.  The function rpaphp_config_pci_adapter()
is really just one line of code, once all the dbg printks are removed.
And its called in only one place. So replace the call by the one line.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The function rpaphp_fixup_new_pci_devices() has been migrated to
pcibios_fixup_new_pci_devices() in
arch/powerpc/platforms/pseries/pci_dlpar.c
This patch removes the old version.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The function rpaphp_find_pci_bus() has been migrated to
pcibios_find_pci_bus() in arch/powerpc/platforms/pseries/pci_dlpar.c
This patch removes the old version.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This patch fixes the AMD POGO errata on the hotplug controller where the
platform will lock up or reboot if PERR/SERR generation is enabled and a
slot is sent an enable command.  This fix disables PERR/SERR generation
before a slot is sent the enable command by first saving related
registers, turning off SERR/PERR generation, enabling the slot, then
restoring the registers.
Signed-off-by: NDavid Keck <david.keck@amd.com>
Cc: Kristen Accardi <kristen.c.accardi@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Removing and then adding a PCI slot to a running partition results in
a kernel panic. The current code attempts to add iospace for an entire
root bus, which is inappropriate, and silently fails.  When a pci device
tries to use the iospace, a page fault is taken, as the iospace had not
been mapped, and of course the page fault cannot be resolved.

This only occurs for PCI adapters using pio, which may be why it hadn't
been seen earlier (this seems to have been broken for a while).
This patch has survived testing of dozens of slot add and removes.
Signed-off-by: NLinas Vepstas <linas@austin.ibm.com>
Acked-by: NJohn Rose <johnrose@austin.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>