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NeilBrown 51d5668cb2 md: never advance 'events' counter by more than 1. 
When assembling arrays, md allows two devices to have different event
counts as long as the difference is only '1'.  This is to cope with
a system failure between updating the metadata on two difference
devices.

However there are currently times when we update the event count by
2.  This was done to keep the event count even when the array is clean
and odd when it is dirty, which allows us to avoid writing common
update to spare devices and so allow those spares to go to sleep.

This is bad for the above reason.  So change it to never increase by
two.  This means that the alignment between 'odd/even' and
'clean/dirty' might take a little longer to attain, but that is only a
small cost.  The spares will get a few more updates but that will
still be spared (;-) most updates and can still go to sleep.

Prior to this patch there was a small chance that after a crash an
array would fail to assemble due to the overly large event count
mismatch.

Signed-off-by: NeilBrown <neilb@suse.de>
2009-08-13 09:54:02 +10:00
..
accessibility
acpi Merge branch 'misc-2.6.31' into release 2009-08-02 12:55:51 -04:00
amba [ARM] amba: fix amba device resources 2009-07-05 22:39:08 +01:00
ata libata: accept late unlocking of HPA 2009-07-28 21:07:09 -04:00
atm
auxdisplay
base driver core: sysdev: do not send KOBJ_ADD uevent if kobject_init_and_add fails 2009-07-28 13:45:22 -07:00
block mg_disk: Add missing ready status check on mg_write() 2009-07-28 08:57:33 +02:00
bluetooth headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
cdrom
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2009-08-04 15:39:43 -07:00
clocksource clocksource: sh_tmu: Make undefined TCOR behaviour less undefined. 2009-06-24 21:08:11 +09:00
connector connector: maintainer/mail update. 2009-07-21 12:43:51 -07:00
cpufreq [CPUFREQ] Make cpufreq suspend code conditional on powerpc. 2009-08-04 14:32:11 -04:00
cpuidle
crypto crypto: padlock-aes - work around Nano CPU errata in CBC mode 2009-06-18 19:31:09 +08:00
dca
dio
dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2009-07-30 16:46:31 -07:00
edac amd64_edac: print debug statements only on error 2009-08-04 12:10:06 +02:00
eisa
firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2009-07-06 14:03:44 -07:00
firmware Pull for-2.6.31 into release 2009-06-17 09:35:24 -07:00
gpio headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel 2009-08-07 19:03:59 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2009-07-22 09:30:07 -07:00
hwmon hwmon: (asus_atk0110) Fix upper limit readings 2009-07-28 16:31:39 +02:00
i2c i2c-omap: OMAP3430 Silicon Errata 1.153 2009-07-30 01:03:24 +01:00
ide ide-tape: Don't leak kernel stack information 2009-07-21 20:36:25 -07:00
idle
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2009-07-06 14:03:44 -07:00
ieee802154
infiniband Merge branches 'ehca', 'misc', 'mlx4', 'mthca' and 'nes' into for-linus 2009-06-23 10:38:47 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2009-08-07 10:42:14 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-04 15:38:34 -07:00
leds Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
lguest lguest and virtio: cleanup struct definitions to Linux style. 2009-07-30 16:03:46 +09:30
macintosh powerpc/pmac: Fix DMA ops for MacIO devices 2009-06-26 14:37:25 +10:00
mca
md md: never advance 'events' counter by more than 1. 2009-08-13 09:54:02 +10:00
media V4L/DVB (12303): cx23885: check pointers before dereferencing in dprintk macro 2009-07-24 14:03:32 -03:00
memstick
message fusion: mptsas, fix lock imbalance 2009-06-22 08:54:14 -05:00
mfd mfd: twl4030 irq fixes 2009-08-04 20:31:32 +02:00
misc cb710: use SG_MITER_TO_SG/SG_MITER_FROM_SG 2009-07-31 12:28:46 +02:00
mmc drivers/mmc: correct error-handling code 2009-08-07 10:39:56 -07:00
mtd mtd: mtdblock: introduce mtdblks_lock 2009-08-03 14:25:00 +01:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-04 15:38:34 -07:00
nubus
of of/mdio: Add support function for Ethernet fixed-link property 2009-07-22 09:27:18 -07:00
oprofile oprofile: reset bt_lost_no_mapping with other stats 2009-07-10 12:35:36 +02:00
parisc parisc: hppb.c - fix printk format strings 2009-08-02 15:42:39 +02:00
parport parport/serial: add support for NetMos 9901 Multi-IO card 2009-06-30 18:55:59 -07:00
pci intel-iommu: Fix enabling snooping feature by mistake 2009-08-06 11:35:50 +01:00
pcmcia Remove multiple KERN_ prefixes from printk formats 2009-07-08 10:30:03 -07:00
platform Merge branch 'bugzilla-13825' into release 2009-08-02 12:36:01 -04:00
pnp Merge branches 'acerhdf', 'acpi-pci-bind', 'bjorn-pci-root', 'bugzilla-12904', 'bugzilla-13121', 'bugzilla-13396', 'bugzilla-13533', 'bugzilla-13612', 'c3_lock', 'hid-cleanups', 'misc-2.6.31', 'pdc-leak-fix', 'pnpacpi', 'power_nocheck', 'thinkpad_acpi', 'video' and 'wmi' into release 2009-06-24 01:19:50 -04:00
power Merge git://git.infradead.org/users/cbou/battery-2.6.31 2009-07-30 16:45:53 -07:00
pps LinuxPPS: core support 2009-06-18 13:04:04 -07:00
ps3
rapidio
regulator
rtc rtc: mark if rtc-cmos drivers were successfully registered 2009-07-29 19:10:35 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2009-08-04 15:38:10 -07:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-08-04 15:38:34 -07:00
serial Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-08-07 10:46:51 -07:00
sh
sn
spi spi: omap2_mcspi rxdma bugfix 2009-07-29 19:10:35 -07:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-07-09 20:33:18 -07:00
staging Staging: rspiusb: Fix buffer overflow 2009-08-07 16:12:03 -07:00
tc
telephony headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
thermal
uio
usb USB: fix oops on disconnect in cdc-acm 2009-08-07 16:05:14 -07:00
uwb
video i.MX31: fix framebuffer locking regressions 2009-08-07 10:39:56 -07:00
virtio virtio: refactor find_vqs 2009-07-30 16:03:45 +09:30
vlynq vlynq: fix typo in Kconfig to enable debugging 2009-07-06 13:57:03 -07:00
w1 drivers/w1/masters/omap_hdq.c: fix missing mutex unlock 2009-08-07 10:39:55 -07:00
watchdog Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-08-07 10:46:51 -07:00
xen xen: Use kcalloc() in xen_init_IRQ() 2009-07-01 11:19:47 +02:00
zorro
Kconfig LinuxPPS: core support 2009-06-18 13:04:04 -07:00
Makefile LinuxPPS: core support 2009-06-18 13:04:04 -07:00