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Stefan Weinhuber 4fa52aa7a8 [S390] dasd: add enhanced DASD statistics interface 
This patch extends the DASD statistics to allow for a more detailed
analysis of DASD I/O operations. In particular we want the statistics
to provide answers to the following questions:
- How many requests used a PAV alias?
- How many requests used High Performance FICON?
- How do read request perform versus write requests?

The existing DASD statistics interface has several shortcomings
- The interface for global data is a formatted text table in procfs
  (/proc/dasd/statistics). The layout is meant for human readers and
  is not to easy to parse. If values get to large for the table
  layout, they get scaled down.
- The statistics which are collected per block device can be
  accessed via an ioctl interface, which can only be extended by
  defining a new ioctl.
- There is no statistics interface for individual PAV base and alias
  devices.

To overcome theses shortcomings we create a new DASD statistics
interface in debugfs. This interface will contain one entry for global
data, one per DASD block device, and one per DASD base and alias
device. Each file contains the statistic data in easy to parse
name/value and name/array pairs. The existing interfaces will remain
functional, but they will not be extended.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-07-24 10:48:23 +02:00
..
accessibility
acpi Merge branches 'd3cold', 'bugzilla-37412' and 'bugzilla-38152' into release 2011-07-14 00:16:38 -04:00
amba
ata
atm lanai: use pci_dev->subsystem_device 2011-07-12 07:59:38 -07:00
auxdisplay
base Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap 2011-07-23 11:14:47 -07:00
bcma Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-07-15 10:05:24 -04:00
block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-07-15 10:05:24 -04:00
cdrom
char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
clk
clocksource Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-23 10:34:47 -07:00
connector Merge branch 'ptrace' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc 2011-07-22 15:06:50 -07:00
cpufreq [CPUFREQ] fix cpumask memory leak in acpi-cpufreq on cpu hotplug. 2011-07-10 17:03:04 -04:00
cpuidle
crypto
dca
dio
dma Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:52:44 -07:00
edac
eisa
firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2011-07-22 14:49:48 -07:00
firmware
gpio Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:50:57 -07:00
gpu Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6 2011-07-21 11:07:18 -07:00
hid Merge branches 'roccat', 'upstream' and 'wiimote' into for-linus 2011-07-22 22:47:08 +02:00
hwmon hwmon: (max1111) Fix race condition causing NULL pointer exception 2011-07-17 18:39:19 +02:00
hwspinlock
i2c Merge branch 'for-30-rc5/all-i2c' of git://git.fluff.org/bjdooks/linux 2011-07-07 16:29:29 -07:00
ide
idle
ieee802154
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2011-07-22 14:50:12 -07:00
input Merge branch 'timers-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:51:56 -07:00
iommu iommu/amd: Don't use MSI address range for DMA addresses 2011-07-06 17:14:44 +02:00
isdn net: Push protocol type directly down to header_ops->cache() 2011-07-13 02:29:59 -07:00
leds Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:50:57 -07:00
lguest lguest: Fix in/out emulation 2011-07-22 14:39:51 +09:30
macintosh drivers: fix up various ->llseek() implementations 2011-07-20 20:47:58 -04:00
mca
md Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
media Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-07-21 13:38:42 -07:00
memstick
message
mfd w1: ds1wm: add a reset recovery parameter 2011-07-08 21:14:44 -07:00
misc
mmc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2011-07-22 14:43:13 -07:00
mtd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
net Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2011-07-22 14:50:12 -07:00
nfc NFC: pn533: add NXP pn533 nfc device driver 2011-07-05 15:26:58 -04:00
nubus
of Merge branch 'of-pci' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2011-07-22 14:54:02 -07:00
oprofile perf: Remove the nmi parameter from the oprofile_perf backend 2011-07-21 20:41:58 +02:00
parisc
parport
pci Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:39:42 -07:00
pcmcia pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting 2011-07-11 14:26:34 +08:00
platform hp-wmi: fix use after free 2011-07-11 09:52:35 -04:00
pnp
power
pps
ps3
ptp
rapidio
regulator regulator: Convert tps65023 to use regmap API 2011-07-23 07:57:02 +01:00
rtc Merge branch 'timers-rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:52:39 -07:00
s390 [S390] dasd: add enhanced DASD statistics interface 2011-07-24 10:48:23 +02:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-07-23 11:13:11 -07:00
sfi
sh switch assorted clock drivers to debugfs_remove_recursive() 2011-07-20 20:47:51 -04:00
sn
spi Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:52:44 -07:00
ssb Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-07-14 07:56:40 -07:00
staging Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
target Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-07-23 11:13:11 -07:00
tc
telephony
thermal
tty Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:53:38 -07:00
uio
usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
uwb
vhost vhost: handle wrap around in # of bufs math 2011-07-21 10:48:27 +03:00
video fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers 2011-07-20 20:47:59 -04:00
virtio virtio: expose for non-virtualization users too 2011-07-23 16:20:30 +09:30
vlynq
w1 w1: ds1wm: add a reset recovery parameter 2011-07-08 21:14:44 -07:00
watchdog watchdog: hpwdt depends on PCI 2011-07-17 12:40:08 +00:00
xen Merge branch 'stable/drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-07-22 13:45:15 -07:00
zorro
Kconfig virtio: expose for non-virtualization users too 2011-07-23 16:20:30 +09:30
Makefile Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:39:42 -07:00