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56056c2e7d
linux/drivers
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Zhengyuan Liu 56056c2e7d md/raid5: write an empty meta-block when creating log super-block 
If superblock points to an invalid meta block, r5l_load_log will set
create_super with true and create an new superblock, this runtime path
would always happen if we do no writing I/O to this array since it was
created. Writing an empty meta block could avoid this unnecessary
action at the first time we created log superblock.

Another reason is for the corretness of log recovery. Currently we have
bellow code to guarantee log revocery to be correct.

        if (ctx.seq > log->last_cp_seq + 1) {
                int ret;

                ret = r5l_log_write_empty_meta_block(log, ctx.pos, ctx.seq + 10);
                if (ret)
                        return ret;
                log->seq = ctx.seq + 11;
                log->log_start = r5l_ring_add(log, ctx.pos, BLOCK_SECTORS);
                r5l_write_super(log, ctx.pos);
        } else {
                log->log_start = ctx.pos;
                log->seq = ctx.seq;
        }

If we just created a array with a journal device, log->log_start and
log->last_checkpoint should all be 0, then we write three meta block
which are valid except mid one and supposed crash happened. The ctx.seq
would equal to log->last_cp_seq + 1 and log->log_start would be set to
position of mid invalid meta block after we did a recovery, this will
lead to problems which could be avoided with this patch.

Signed-off-by: Zhengyuan Liu <liuzhengyuan@kylinos.cn>
Signed-off-by: Shaohua Li <shli@fb.com>
2016-10-24 15:28:18 -07:00
..
accessibility
acpi More ACPI updates for v4.9-rc1 2016-10-14 12:50:05 -07:00
amba
android
ata ahci: qoriq: Revert "ahci: qoriq: Disable NCQ on ls2080a SoC" 2016-09-30 10:28:51 +02:00
atm
auxdisplay auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays 2016-10-06 17:03:41 +02:00
base memory-hotplug: fix store_mem_state() return value 2016-10-07 18:46:28 -07:00
bcma
block rbd: don't retry watch reregistration if header object is gone 2016-10-15 23:22:09 +02:00
bluetooth Bluetooth: btusb: Fix atheros firmware download error 2016-10-07 09:46:56 +02:00
bus ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
cdrom
char A small bug fix and a new driver for acting as an IPMI device. 2016-10-23 15:56:23 -07:00
clk ARM: SoC: late DT updates for v4.9 2016-10-07 21:34:49 -07:00
clocksource Revert "clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init" 2016-10-20 21:58:58 +02:00
connector
cpufreq More power management updates for v4.9-rc1 2016-10-14 12:46:13 -07:00
cpuidle Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-10-10 14:04:16 -07:00
dax Merge branch 'for-4.9/dax' into libnvdimm-for-next 2016-10-07 16:46:30 -07:00
dca
devfreq PM / devfreq: Skip status update on uninitialized previous_freq 2016-10-11 00:01:20 +02:00
dio
dma dmaengine updates for 4.8-rc1 2016-10-06 17:13:54 -07:00
dma-buf Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux 2016-10-11 18:12:22 -07:00
edac * Altera Arria10 enablement of NAND, DMA, USB, QSPI and SD-MMC FIFO 2016-10-04 12:06:26 -07:00
eisa
extcon
firewire firewire: nosy: do not ignore errors in ioremap_nocache() 2016-10-09 11:38:11 +02:00
firmware efi/arm: Fix absolute relocation detection for older toolchains 2016-10-19 14:49:44 +02:00
fmc
fpga
gpio gpio: pca953x: add a comment explaining the need for a lockdep subclass 2016-10-11 23:17:08 +02:00
gpu Merge branch 'drm-etnaviv-fixes' of git://git.pengutronix.de/lst/linux into drm-fixes 2016-10-21 13:27:55 +10:00
hid HID: add quirk for Akai MIDImix. 2016-10-10 10:58:22 +02:00
hsi
hv Drivers: hv: get rid of id in struct vmbus_channel 2016-09-27 12:35:49 +02:00
hwmon hwmon: (max31790) potential ERR_PTR dereference 2016-10-17 10:16:20 -07:00
hwspinlock
hwtracing
i2c i2c: 'i2c-bus' node support for v4.8-rc1 2016-10-11 23:37:26 +02:00
ide
idle nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
iio Staging/IIO patches for 4.9-rc1 2016-10-05 14:50:51 -07:00
infiniband Merge branch 'gup_flag-cleanups' 2016-10-19 08:39:47 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-10-14 13:19:30 -07:00
iommu IOMMU Updates for Linux v4.9 2016-10-11 12:52:41 -07:00
ipack
irqchip GIC updates for Linux 4.9-rc2 2016-10-21 21:40:29 +02:00
isdn
leds
lguest
lightnvm Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block 2016-10-07 14:42:05 -07:00
macintosh
mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2016-10-06 17:36:53 -07:00
mcb mcb: Add a dma_device to mcb_device 2016-09-27 12:33:47 +02:00
md md/raid5: write an empty meta-block when creating log super-block 2016-10-24 15:28:18 -07:00
media Merge branch 'gup_flag-cleanups' 2016-10-19 08:39:47 -07:00
memory ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
memstick memstick: rtsx_usb_ms: Manage runtime PM when accessing the device 2016-10-17 15:43:05 +02:00
message
mfd - Core Frameworks 2016-10-07 08:35:35 -07:00
misc powerpc fixes for 4.9 #3 2016-10-21 19:13:00 -07:00
mmc mmc: rtsx_usb_sdmmc: Handle runtime PM while changing the led 2016-10-17 15:43:03 +02:00
mtd UBI: Fix crash in try_recover_peb() 2016-10-20 00:06:06 +02:00
net Merge of the qedr RoCE driver 2016-10-14 13:43:08 -07:00
nfc
ntb
nubus
nvdimm Merge branch 'for-4.9/dax' into libnvdimm-for-next 2016-10-07 16:46:30 -07:00
nvme Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2016-10-21 10:54:01 -07:00
nvmem ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
of Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
oprofile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
parisc
parport
pci PCI: designware-plat: Update author email address 2016-10-21 09:54:46 -05:00
pcmcia
perf perf: xgene: Remove bogus IS_ERR() check 2016-10-17 15:50:07 +01:00
phy
pinctrl pinctrl: intel: Only restore pins that are used by the driver 2016-10-18 14:38:16 +02:00
platform platform-drivers-x86 for 4.9-2 2016-10-19 11:45:06 -07:00
pnp
power power supply and reset changes for the v4.9 series 2016-10-06 18:21:15 -07:00
powercap
pps pps: kc: fix non-tickless system config dependency 2016-10-11 15:06:32 -07:00
ps3
ptp drivers/ptp: Fix kernel memory disclosure 2016-10-13 10:20:06 -04:00
pwm
rapidio mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
ras
regulator Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-10-12 11:05:23 -07:00
remoteproc rpmsg updates for v4.9 2016-10-06 17:03:49 -07:00
reset
rpmsg
rtc RTC for 4.9 2016-10-14 13:13:44 -07:00
s390 scsi: zfcp: spin_lock_irqsave() is not nestable 2016-10-14 16:21:08 -04:00
sbus
scsi SCSI fixes on 20161021 2016-10-21 10:57:09 -07:00
sfi
sh
sn
soc powerpc updates for 4.9 #2 2016-10-14 11:07:42 -07:00
spi kthread: kthread worker API cleanup 2016-10-11 15:06:33 -07:00
spmi spmi: pmic-arb: Return an error code if sanity check fails 2016-09-27 12:43:34 +02:00
ssb
staging mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
target target/tcm_fc: use CPU affinity for responses 2016-10-21 01:19:44 -07:00
tc
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-10-12 11:05:23 -07:00
thunderbolt
tty kthread: kthread worker API cleanup 2016-10-11 15:06:33 -07:00
uio
usb Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
uwb
vfio vfio_pci: use pci_alloc_irq_vectors 2016-09-29 13:36:38 -06:00
vhost
video Merge branch 'gup_flag-cleanups' 2016-10-19 08:39:47 -07:00
virt mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
virtio
vlynq
vme vme: fake: remove unexpected unlock in fake_master_set() 2016-09-27 12:43:35 +02:00
w1
watchdog Merge branches 'acpi-wdat' and 'acpi-cppc' 2016-10-21 22:24:23 +02:00
xen xen: features and fixes for 4.9-rc0 2016-10-06 11:19:10 -07:00
zorro
Kconfig
Makefile A small bug fix and a new driver for acting as an IPMI device. 2016-10-23 15:56:23 -07:00