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NeilBrown f91de92ed6 [PATCH] md: allow md arrays to be started read-only (module parameter). 
When an md array is started, the superblock will be written, and resync may
commense.  This is not good if you want to be completely read-only as, for
example, when preparing to resume from a suspend-to-disk image.

So introduce a module parameter "start_ro" which can be set
to '1' at boot, at module load, or via
  /sys/module/md_mod/parameters/start_ro

When this is set, new arrays get an 'auto-ro' mode, which disables all
internal io (superblock updates, resync, recovery) and is automatically
switched to 'rw' when the first write request arrives.

The array can be set to true 'ro' mode using 'mdadm -r' before the first
write request, or resync can be started without a write using 'mdadm -w'.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2005-11-09 07:56:38 -08:00
..
acorn [ARM] Turn ARM RiscPC PCF8583 i2c RTC driver into a proper module 2005-10-30 19:07:59 +00:00
acpi [PATCH] sched: resched and cpu_idle rework 2005-11-09 07:56:33 -08:00
atm [PATCH] gfp flags annotations - part 1 2005-10-08 15:00:57 -07:00
base [PATCH] fix remaining missing includes 2005-11-07 07:53:41 -08:00
block [PATCH] add a file_permission helper 2005-11-09 07:55:59 -08:00
bluetooth [Bluetooth]: Add endian annotations to the core 2005-11-08 09:57:21 -08:00
cdrom [PATCH] drivers/cdrom: kmalloc + memset -> kzalloc conversion 2005-11-07 07:53:59 -08:00
char [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
connector [PATCH] Process Events Connector 2005-11-07 07:53:35 -08:00
cpufreq [PATCH] cpu hotplug: fix locking in cpufreq drivers 2005-11-09 07:55:50 -08:00
crypto [PATCH] CONFIG_IA32 2005-10-30 17:37:10 -08:00
dio [PATCH] drivers/dio: kmalloc + memset -> kzalloc conversion 2005-11-07 07:53:59 -08:00
eisa [PATCH] drivers/eisa: kmalloc + memset -> kzalloc conversion 2005-11-07 07:53:59 -08:00
fc4 [PATCH] kfree cleanup: misc remaining drivers 2005-11-07 07:54:05 -08:00
firmware [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
hwmon [PATCH] max1619 fix 2005-11-07 07:54:09 -08:00
i2c [PATCH] kfree cleanup: misc remaining drivers 2005-11-07 07:54:05 -08:00
ide [PATCH] ppc: Fix PowerBook HD led on ARCH=powerpc 2005-11-08 11:19:51 +11:00
ieee1394 [PATCH] ieee1394: fix-up schedule_timeout() usage 2005-11-07 07:53:57 -08:00
infiniband [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
input [PATCH] Input: fix 'uniq' reporting in hotplug handler 2005-11-09 07:55:50 -08:00
isdn [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
macintosh macintosh: Always export pmu_[un]register_sleep_notifier if CONFIG_PM set 2005-11-08 12:14:50 +11:00
mca [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
md [PATCH] md: allow md arrays to be started read-only (module parameter). 2005-11-09 07:56:38 -08:00
media [PATCH] V4L: 926: Saa7134 alsa can only be autoloaded after saa7134 is active 2005-11-09 07:56:32 -08:00
message [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
mfd [PATCH] fix remaining missing includes 2005-11-07 07:53:41 -08:00
misc [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
mmc Merge master.kernel.org:/home/rmk/linux-2.6-mmc 2005-11-07 13:32:52 -08:00
mtd [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
net [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
nubus Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
oprofile [PATCH] clean up inline static vs static inline 2005-07-27 16:26:20 -07:00
parisc Auto-update from upstream 2005-10-28 12:18:07 -04:00
parport [PATCH] kfree cleanup: misc remaining drivers 2005-11-07 07:54:05 -08:00
pci [PATCH] kfree cleanup: misc remaining drivers 2005-11-07 07:54:05 -08:00
pcmcia [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
pnp [PATCH] drivers/pnp/: cleanups 2005-11-07 07:54:09 -08:00
rapidio [PATCH] rapidio: message interface updates 2005-11-07 07:53:47 -08:00
s390 [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
sbus [SPARC]: Missing compat_ioctl hookup in openprom driver. 2005-11-08 10:00:13 -08:00
scsi [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
serial [SUNSU]: Do not mark sunsu_console_setup() __init 2005-11-07 14:10:21 -08:00
sh [PATCH] superhyway: multiple block support and VCR rework 2005-11-07 07:53:28 -08:00
sn [PATCH] ioc4: PCI bus speed detection 2005-06-21 18:46:32 -07:00
tc Add .gitignore files for Turbochannel 2005-11-07 18:05:37 +00:00
telephony [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
usb [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason 2005-11-09 07:55:57 -08:00
video [PATCH] drivers/video/vgastate.c: kill dead code 2005-11-09 07:56:36 -08:00
w1 [PATCH] kfree cleanup: misc remaining drivers 2005-11-07 07:54:05 -08:00
zorro [PATCH] fix missing includes 2005-10-30 17:37:32 -08:00
Kconfig [NET]: Add netlink connector. 2005-09-11 19:15:07 -07:00
Makefile [PATCH] RapidIO support: core base 2005-11-07 07:53:46 -08:00