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Tejun Heo 920a4b1038 libata: implement libata.spindown_compat 
Now that libata uses sd->manage_start_stop, libata spins down disk on
shutdown.  In an attempt to compensate libata's previous shortcoming,
some distros sync and spin down disks attached via libata in their
shutdown(8).  Some disks spin back up just to spin down again on
STANDBYNOW1 if the command is issued when the disk is spun down, so
this double spinning down causes problem.

This patch implements module parameter libata.spindown_compat which,
when set to one (default value), prevents libata from spinning down
disks on shutdown thus avoiding double spinning down.  Note that
libata spins down disks for suspend to mem and disk, so with
libata.spindown_compat set to one, disks should be properly spun down
in all cases without modifying shutdown(8).

shutdown(8) should be fixed eventually.  Some drive do spin up on
SYNCHRONZE_CACHE even when their cache is clean.  Those disks
currently spin up briefly when sd tries to shutdown the device and
then the machine powers off immediately, which can't be good for the
head.  We can't skip SYNCHRONIZE_CACHE during shudown as it can be
dangerous data integrity-wise.

So, this spindown_compat parameter is already scheduled for removal by
the end of the next year and here's what shutdown(8) should do.

  * Check whether /sys/modules/libata/parameters/spindown_compat
    exists.  If it does, write 0 to it.

  * For each libata harddisk {
	* Check whether /sys/class/scsi_disk/h:c:i:l/manage_start_stop
	  exists.  Iff it doesn't, synchronize cache and spin the disk
	  down as before.
  }

The above procedure will make shutdown(8) work properly with kernels
before this change, ones with this workaround and later ones without
it.

To accelerate shutdown(8) updates, if the compat mode is in use, this
patch prints BIG FAT warning for five seconds during shutdown (the
optimal interval to annoy the user just the right amount discovered by
hours of tireless usability testing).

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
 		2007-05-11 18:01:04 -04:00
..
ABI Fix occurrences of "the the " 2007-05-09 08:57:56 +02:00
DocBook devres: kernel-doc and DocBook 2007-05-09 07:02:59 +02:00
RCU [PATCH] rcu: add sched torture type to rcutorture 2006-10-04 07:55:31 -07:00
accounting getdelays.c: fix overrun 2007-05-08 11:15:12 -07:00
aoe Fix typos in Documentation/: 'D'-'E' 2006-10-03 22:47:42 +02:00
arm documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
auxdisplay documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
blackfin blackfin architecture 2007-05-07 12:12:58 -07:00
block misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
cdrom [PATCH] pktcdvd: cleanup 2007-02-11 10:51:28 -08:00
connector
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console
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cpu-freq misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
cris
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crypto documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
device-mapper dm: delay target 2007-05-09 12:30:47 -07:00
driver-model misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
drivers/edac [PATCH] EDAC: Add memory scrubbing controls API to core 2007-02-12 09:48:32 -08:00
dvb documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
early-userspace
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fault-injection [PATCH] fault-injection: Correct, disambiguate, and reformat documentation 2006-12-08 08:29:03 -08:00
fb Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-05-09 12:54:17 -07:00
filesystems trivial: s/i_sem /i_mutex/ 2007-05-09 08:58:17 +02:00
firmware_class
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fujitsu/frv misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
hrtimer [PATCH] Add debugging feature /proc/timer_stat 2007-02-16 08:13:59 -08:00
hrtimers [PATCH] hrtimers: move and add documentation 2007-02-16 08:13:58 -08:00
hwmon documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
i2c documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
i2o documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
i386 Documentation/i386/boot.txt: update and correct 2007-05-08 20:47:51 -07:00
ia64 Pull mem-attribute into release branch 2007-04-30 13:56:17 -07:00
infiniband IB/umad: Clarify documentation of transaction ID 2007-04-24 21:30:38 -07:00
input misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
ioctl [PATCH] Document how to decode an IOCTL number 2006-12-10 09:55:40 -08:00
isdn documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
kbuild kbuild: small documentation fix in Documentation/kbuild/modules.txt 2007-05-02 20:58:09 +02:00
kdump [PATCH] PPC64 Kdump documentation update 2007-02-20 17:10:15 -08:00
m68k documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
mips [MIPS] Delete Documentation/mips/pci/pci.README 2007-05-11 14:28:30 +01:00
netlabel Fix occurrences of "the the " 2007-05-09 08:57:56 +02:00
networking documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
parisc
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pcmcia add new_id to PCMCIA drivers 2007-05-07 12:12:50 -07:00
power Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-05-09 12:54:17 -07:00
powerpc misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
s390 documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
scsi documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
serial
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sh sh: SH7722 clock framework support. 2007-05-07 02:11:56 +00:00
sound [ALSA] hda-codec - Add ALC861VD Lenovo support 2007-05-11 16:56:18 +02:00
sparc Fix typos in Documentation/: 'Q'-'R' 2006-10-03 22:54:15 +02:00
spi SPI kerneldoc 2007-05-08 11:15:16 -07:00
sysctl misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
telephony
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uml Fix typos in /Documentation : 'U-Z' 2006-11-30 04:58:40 +01:00
usb documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
video4linux Merge branch 'master' of ssh://master.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb 2007-05-11 12:57:16 -07:00
vm SLUB: slabinfo upgrade 2007-05-09 12:30:44 -07:00
w1
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watchdog Fix typos in /Documentation : 'T'' 2006-11-30 04:55:36 +01:00
x86_64 [PATCH] x86-64: Dynamically adjust machine check interval 2007-05-02 19:27:19 +02:00
00-INDEX Remove long-unmaintained ftape driver subsystem. 2006-12-03 22:22:41 -05:00
BUG-HUNTING
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Changes Fix typos in doc and comments 2006-11-30 05:32:19 +01:00
CodingStyle Fix chapter reference in CodingStyle 2007-05-08 11:15:13 -07:00
DMA-API.txt [PATCH] Pass struct dev pointer to dma_cache_sync() 2006-12-07 08:39:41 -08:00
DMA-ISA-LPC.txt Fix typos in /Documentation : 'T'' 2006-11-30 04:55:36 +01:00
DMA-mapping.txt Documentation: remove duplicated words 2006-10-03 22:57:56 +02:00
HOWTO HOWTO: Add a reference to Harbison and Steele 2007-02-07 10:37:13 -08:00
IO-mapping.txt
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IPMI.txt [PATCH] IPMI: system interface hotplug 2006-12-07 08:39:47 -08:00
IRQ-affinity.txt
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IRQ.txt
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MSI-HOWTO.txt misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
ManagementStyle
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PCIEBUS-HOWTO.txt
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README.DAC960
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README.cycladesZ
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SAK.txt
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SecurityBugs
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SubmitChecklist SubmitChecklist: add -W help 2007-05-11 08:29:35 -07:00
SubmittingDrivers Documentation: Ask driver writers to provide PM support 2007-05-08 11:14:59 -07:00
SubmittingPatches doc: what a patch series is 2007-05-09 12:30:50 -07:00
VGA-softcursor.txt
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applying-patches.txt
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atomic_ops.txt
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basic_profiling.txt
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binfmt_misc.txt documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
cachetlb.txt [ARM] pass vma for flush_anon_page() 2007-01-08 19:49:54 +00:00
cciss.txt Documentation: cciss: detecting failed drives 2007-05-08 11:15:10 -07:00
cli-sti-removal.txt
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computone.txt remove mentionings of devfs in documentation 2006-10-03 22:17:48 +02:00
cpqarray.txt
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cpu-hotplug.txt Add suspend-related notifications for CPU hotplug 2007-05-09 12:30:56 -07:00
cpu-load.txt [PATCH] Documentation: CPU load calculation description 2007-03-01 14:53:39 -08:00
cpusets.txt [PATCH] CPUSETS: add mems to basic usage documentation 2007-04-02 10:06:08 -07:00
cputopology.txt Fix typos in Documentation/: 'D'-'E' 2006-10-03 22:47:42 +02:00
dcdbas.txt
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debugging-modules.txt
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dell_rbu.txt Fix typos in Documentation/: 'N'-'P' 2006-10-03 22:52:05 +02:00
devices.txt [PATCH] New updated devices.txt - LANANA 2006-12-07 08:39:45 -08:00
digiepca.txt
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dnotify.txt
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dontdiff [PATCH] x86-64: Don't exclude asm-offsets.c in Documentation/dontdiff 2007-05-02 19:27:21 +02:00
ecryptfs.txt [PATCH] ecryptfs: fs/Makefile and fs/Kconfig 2006-10-04 07:55:24 -07:00
eisa.txt Fix typos in /Documentation : 'U-Z' 2006-11-30 04:58:40 +01:00
exception.txt Documentation: remove duplicated words 2006-10-03 22:57:56 +02:00
feature-removal-schedule.txt libata: implement libata.spindown_compat 2007-05-11 18:01:04 -04:00
floppy.txt
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gpio.txt Documentation/gpio.txt mentions GENERIC_GPIO 2007-05-11 08:29:32 -07:00
hayes-esp.txt
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highuid.txt Fix "can not" in Documentation and Kconfig 2006-10-03 22:53:09 +02:00
hpet.txt
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hw_random.txt
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ide.txt ide: make legacy IDE VLB modules check for the "probe" kernel params (v2) 2007-03-03 17:48:55 +01:00
initrd.txt
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io_ordering.txt
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ioctl-number.txt Misc: add sensable phantom driver 2007-05-08 11:15:14 -07:00
iostats.txt
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irqflags-tracing.txt
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isapnp.txt
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java.txt documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
kernel-doc-nano-HOWTO.txt [PATCH] Discuss a couple common errors in kernel-doc usage. 2007-02-11 10:51:32 -08:00
kernel-docs.txt documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
kernel-parameters.txt Doc Fix: remove mention of combined mode-related kernel parameters 2007-05-09 20:15:47 -04:00
keys-request-key.txt
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keys.txt [AF_RXRPC]: Key facility changes for AF_RXRPC 2007-04-26 15:46:23 -07:00
kobject.txt Fix typos in Documentation/: 'D'-'E' 2006-10-03 22:47:42 +02:00
kprobes.txt Kprobes: The ON/OFF knob thru debugfs 2007-05-08 11:15:19 -07:00
kref.txt Fix wrong identifier name in Documentation/kref.txt 2007-05-11 19:07:14 +02:00
laptop-mode.txt laptop-mode URL update 2007-05-08 11:15:14 -07:00
ldm.txt
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leds-class.txt
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local_ops.txt [PATCH] local_t: Documentation 2007-02-11 10:51:32 -08:00
lockdep-design.txt [PATCH] fix lockdep-design.txt 2006-10-11 11:14:24 -07:00
locks.txt
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logo.gif
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logo.txt
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magic-number.txt Magic number prefix consistency change to Documentation/magic-number.txt 2007-05-09 08:58:18 +02:00
mandatory.txt
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mca.txt Fix some typos in Documentation/: 'A' 2006-10-03 22:45:33 +02:00
md.txt md: allow reshape_position for md arrays to be set via sysfs 2007-05-09 12:30:57 -07:00
memory-barriers.txt Fix typos in /Documentation : 'T'' 2006-11-30 04:55:36 +01:00
memory.txt
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mono.txt Fix "can not" in Documentation and Kconfig 2006-10-03 22:53:09 +02:00
moxa-smartio
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mtrr.txt
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mutex-design.txt
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nbd.txt
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nfsroot.txt [PATCH] fix the defaults mentioned in Documentation/nfsroot.txt 2007-02-12 09:48:28 -08:00
nmi_watchdog.txt
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nommu-mmap.txt [PATCH] NOMMU: Make futexes work under NOMMU conditions 2006-09-27 08:26:15 -07:00
numastat.txt
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oops-tracing.txt doc: fix oops-tracing duplicate 2007-05-08 11:15:14 -07:00
paride.txt
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parport-lowlevel.txt
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parport.txt
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pci-error-recovery.txt Documentation: remove duplicated words 2006-10-03 22:57:56 +02:00
pci.txt Fix occurrences of "the the " 2007-05-09 08:57:56 +02:00
pcieaer-howto.txt documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
pi-futex.txt fix a typo in Documentation/pi-futex.txt 2006-10-03 23:39:02 +02:00
pm.txt Fix "can not" in Documentation and Kconfig 2006-10-03 22:53:09 +02:00
pnp.txt misc doc and kconfig typos 2007-05-09 08:58:15 +02:00
preempt-locking.txt
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prio_tree.txt Documentation: remove duplicated words 2006-10-03 22:57:56 +02:00
ramdisk.txt
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rbtree.txt [PATCH] Documentation/rbtree.txt 2007-02-11 10:51:35 -08:00
riscom8.txt
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robust-futex-ABI.txt Fix typos in /Documentation : 'U-Z' 2006-11-30 04:58:40 +01:00
robust-futexes.txt Fix typos in /Documentation : Misc 2006-11-30 05:21:10 +01:00
rocket.txt Fix typos in Documentation/: 'S' 2006-10-03 22:55:17 +02:00
rpc-cache.txt Documentation: remove duplicated words 2006-10-03 22:57:56 +02:00
rt-mutex-design.txt [PATCH] typo fixes for rt-mutex-design.txt 2006-10-01 00:39:24 -07:00
rt-mutex.txt
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rtc.txt rtc: remove "RTC_ALM_SET mode" bugs 2007-05-08 11:15:19 -07:00
sched-arch.txt
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sched-coding.txt Fix typos in Documentation/: 'H'-'M' 2006-10-03 22:50:39 +02:00
sched-design.txt Fix typos in Documentation/: 'H'-'M' 2006-10-03 22:50:39 +02:00
sched-domains.txt
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sched-stats.txt
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serial-console.txt
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sgi-ioc4.txt
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sgi-visws.txt
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sharedsubtree.txt Fix typos in /Documentation : 'T'' 2006-11-30 04:55:36 +01:00
smart-config.txt
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smp.txt
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sony-laptop.txt sony-laptop: update documentation and Kconfig help 2007-04-10 16:01:19 -04:00
sonypi.txt documentation: convert the Documentation directory to UTF-8 2007-05-09 08:58:19 +02:00
sparse.txt [PATCH] update 'getting sparse' info. 2007-03-08 16:47:58 -08:00
specialix.txt
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spinlocks.txt
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stable_api_nonsense.txt [PATCH] i386: always enable regparm 2006-12-07 02:14:12 +01:00
stable_kernel_rules.txt Fix typos in /Documentation : Misc 2006-11-30 05:21:10 +01:00
stallion.txt
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svga.txt
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sx.txt
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sysrq.txt doc: Update sysrq doc for sh kgdb trigger. 2007-05-07 02:10:53 +00:00
thinkpad-acpi.txt ACPI: thinkpad-acpi: add sysfs support to wan and bluetooth subdrivers 2007-04-28 21:41:20 -04:00
time_interpolators.txt
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tipar.txt
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tty.txt tty: Clarify documentation of ->write() 2007-05-08 11:14:59 -07:00
unicode.txt
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unshare.txt Documentation: remove duplicated words 2006-10-03 22:57:56 +02:00
video-output.txt output: Add output class document 2006-12-20 01:46:58 -05:00
voyager.txt
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xterm-linux.xpm
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zorro.txt
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README.cycladesZ 

The Cyclades-Z must have firmware loaded onto the card before it will
operate.  This operation should be performed during system startup,

The firmware, loader program and the latest device driver code are
available from Cyclades at
    ftp://ftp.cyclades.com/pub/cyclades/cyclades-z/linux/