unimore/kernel-hacking-2024-linux-steffo
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NeilBrown f0b4f7e2f2 md: Fix - again - partition detection when array becomes active 
Revert
    b821eaa572
and
    f3b99be19d

When I wrote the first of these I had a wrong idea about the
lifetime of 'struct block_device'.  It can disappear at any time that
the block device is not open if it falls out of the inode cache.

So relying on the 'size' recorded with it to detect when the
device size has changed and so we need to revalidate, is wrong.

Rather, we really do need the 'changed' attribute stored directly in
the mddev and set/tested as appropriate.

Without this patch, a sequence of:
   mknod / open / close / unlink

(which can cause a block_device to be created and then destroyed)
will result in a rescan of the partition table and consequence removal
and addition of partitions.
Several of these in a row can get udev racing to create and unlink and
other code can get confused.

With the patch, the rescan is only performed when needed and so there
are no races.

This is suitable for any stable kernel from 2.6.35.

Reported-by: "Wojcik, Krzysztof" <krzysztof.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
2011-02-24 17:26:41 +11:00
..
accessibility
acpi ACPI / PM: Call suspend_nvs_free() earlier during resume 2011-01-20 18:30:17 -08:00
amba
ata kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
atm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2011-01-24 13:17:06 -08:00
auxdisplay
base PM / Runtime: Don't enable interrupts while running in_interrupt 2011-01-25 20:50:07 +01:00
block Fix over-zealous flush_disk when changing device size. 2011-02-24 17:25:47 +11:00
bluetooth Bluetooth: ath3k: reduce memory usage 2011-01-19 14:40:41 -02:00
cdrom
char console: rename acquire/release_console_sem() to console_lock/unlock() 2011-01-26 10:50:06 +10:00
clk
clocksource drivers/clocksource/tcb_clksrc.c: fix init sequence 2011-01-26 10:50:04 +10:00
connector
cpufreq kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
cpuidle
crypto
dca
dio
dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-01-17 10:54:41 -08:00
edac
eisa
firewire Merge branches 'fixes' and 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2011-01-21 13:34:39 -08:00
firmware kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
gpio langwell_gpio: modify EOI handling following change of kernel irq subsystem 2011-01-26 10:49:59 +10:00
gpu Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2011-01-28 12:10:13 +10:00
hid kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
hwmon hwmon: (lis3) turn down the no IRQ message 2011-01-25 09:10:50 -08:00
i2c i2c: Encourage move to dev_pm_ops by warning on use of legacy methods 2011-01-14 22:03:50 +01:00
ide kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
idle fix a shutdown regression in intel_idle 2011-01-25 05:57:34 +10:00
ieee802154
infiniband kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2011-01-26 16:31:44 +10:00
isdn
leds leds: leds-pwm: return proper error if pwm_request failed 2011-01-26 10:49:58 +10:00
lguest lguest: compile fixes 2011-01-20 21:37:29 +10:30
macintosh powerpc/macintosh: Fix wrong test in fan_{read,write}_reg() 2011-01-21 14:08:34 +11:00
mca
md md: Fix - again - partition detection when array becomes active 2011-02-24 17:26:41 +11:00
media Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2011-01-21 16:50:31 -08:00
memstick
message
mfd mfd: ab8500-core chip version cut 2.0 support 2011-01-14 12:38:18 +01:00
misc misc: Make AB8500_PWM driver depend on U8500 due to PWM breakage 2011-01-14 12:38:12 +01:00
mmc mmc: bfin_sdh: fix alloc size for private data 2011-01-26 00:28:41 -05:00
mtd Merge git://git.infradead.org/mtd-2.6 2011-01-17 11:15:30 -08:00
net bnx2: Eliminate AER error messages on systems not supporting it 2011-01-26 14:28:52 -08:00
nfc drivers/nfc/pn544.c: fix min_t warnings 2011-01-16 17:28:21 -08:00
nubus
of dt/flattree: Return virtual address from early_init_dt_alloc_memory_arch() 2011-01-15 22:01:58 -07:00
oprofile
parisc
parport parport: make lockdep happy with waitlist_lock 2011-01-26 10:49:59 +10:00
pci kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
pcmcia kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
platform intel_scu_ipcutils: Fix the license tag 2011-01-26 08:57:18 +10:00
pnp
power Merge git://git.infradead.org/battery-2.6 2011-01-14 09:25:59 -08:00
pps pps: claim parallel port exclusively 2011-01-26 10:50:00 +10:00
ps3
rapidio rapidio: fix new kernel-doc warnings 2011-01-22 20:32:37 -08:00
regulator regulator: Support MAX8998/LP3974 DVS-GPIO 2011-01-14 12:38:16 +01:00
rtc RTC: Remove Kconfig symbol for UIE emulation 2011-01-21 17:38:20 +01:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2011-01-19 20:25:45 -08:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6 2011-01-14 16:29:49 -08:00
sfi
sh sh: update INTC to clear IRQ sense valid flag 2011-01-19 19:02:35 +09:00
sn
spi Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus 2011-01-18 14:28:48 -08:00
ssb kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
staging console: rename acquire/release_console_sem() to console_lock/unlock() 2011-01-26 10:50:06 +10:00
target [SCSI] target: Add LIO target core v4.0.0-rc6 2011-01-14 10:12:29 -06:00
tc
telephony
thermal
tty Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2011-01-26 16:31:44 +10:00
uio
usb kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
uwb
vhost
video console: rename acquire/release_console_sem() to console_lock/unlock() 2011-01-26 10:50:06 +10:00
virtio virtio: remove virtio-pci root device 2011-01-20 21:37:30 +10:30
vlynq
w1
watchdog
xen Merge branch 'xen/xenbus' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen 2011-01-20 16:37:28 -08:00
zorro
Kconfig [SCSI] target: Add LIO target core v4.0.0-rc6 2011-01-14 10:12:29 -06:00
Makefile Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2011-01-20 16:39:23 -08:00