Hello people and welcome to this edition of kwn!
-We start with Kent Overstreet and his announcement of bcache vers. 12 :
bcache, n.: a cache for arbitrary block devices that uses an SSD It's probably past time I started poking people to see about getting this stuff in. It's synced up with mainline, the documentation is for once relatively up to date, and it looks just about production ready. Suggestions are more than welcome on how to make it easier to review - it's entirely too much code, I know (near 10k lines now). I'll be emailing the patches that touch other parts of the kernel separately. Short overview: Bcache does both writethrough and writeback caching. It presents itself as a new block device, a bit like say md. You can cache an arbitrary number of block devices with a single cache device, and attach and detach things at runtime - it's quite flexible. It's very fast. It uses a b+ tree for the index, along with a journal to coalesce index updates, and a bunch of other cool tricks like auxiliary binary search trees with software floating point keys to avoid a bunch of random memory accesses when doing binary searches in the btree. It does over 50k iops doing 4k random /writes/ without breaking a sweat, and would do many times that if I had faster hardware. It (configurably) tracks and skips sequential IO, so as to efficiently cache random IO. It's got more cool features than I can remember at this point. It's resilient, handling IO errors from the SSD when possible up to a configurable threshhold, then detaches the cache from the backing device even while you're still using it. The code is up at git://evilpiepirate.org/~kent/linux-bcache.git git://evilpiepirate.org/~kent/bcache-tools.git The wiki is woefully out of date, but that might change one day: http://bcache.evilpiepirate.org
-Neil Brown of SUSE has a few minor md updates for 3.1, Jonas Bonn
has OpenRISC fixes for 3.1 and Mauro Carvalho Chehab has media fixes :
Dan Carpenter (1): [media] pwc: precedence bug in pwc_init_controls() Florian Mickler (1): [media] vp7045: fix buffer setup Jarod Wilson (1): [media] nuvoton-cir: simplify raw IR sample handling Jean-François Moine (2): [media] gspca - ov519: Fix LED inversion of some ov519 webcams [media] gspca - sonixj: Fix the darkness of sensor om6802 in 320x240 Jesper Juhl (1): [media] [Resend] viacam: Don't explode if pci_find_bus() returns NULL Kamil Debski (1): [media] v4l2: Fix documentation of the codec device controls Luiz Carlos Ramos (1): [media] gspca - sonixj: Fix wrong register mask for sensor om6802
-Arnd Bergmann issues arm-soc fixes for 3.1 :
I've moved a copy of the arm-soc tree to git.linaro.org for now. Since g.k.o contains to be unavailable, that seemed to be the most reliable alternative for me. The fixes for 3.1 that have come in during this time are for four platforms: cns3xxx, davinci, omap2+, and prima2. I have a large set of build fixes that I found myself during randconfig builds, but most of these have been around forever, so I'm waiting for the merge window with those. I'm trying to feed the actual build regressions through the individual maintainers, so a few of those might be still be coming. [snip...] Anton Vorontsov (1): ARM: cns3xxx: Fix newly introduced warnings in the PCIe code Arnd Bergmann (2): Merge branches 'cns3xxx/fixes', 'omap/fixes' and 'davinci/fixes' into fixes Merge branch 'sirf/fixes' into fixes Jamie Iles (1): ARM: CSR: add missing sentinels to of_device_id tables Linus Walleij (1): ARM: davinci: fix cache flush build error Paul Walmsley (5): OMAP4: clock: re-enable previous clockdomain enable/disable sequence OMAP4: clock: fix compile warning OMAP3: clock: indicate that gpt12_fck and wdt1_fck are in the WKUP clockdomain OMAP2430: hwmod: musb: add missing terminator to omap2430_usbhsotg_addrs[] Merge branches 'non_hwmod_compliant_fix_3.1rc', 'omap3_clock_fixes_3.1rc', 'omap4_clock_fixes_3.1rc', 'missing_2430_musb_adds_terminator_fix_3.1rc' and 'pwrdm_clkdm_fixes_3.1rc' into prcm-fixes-a-3.1rc Rajashekhara, Sudhakar (1): ARM: davinci: da850 EVM: read mac address from SPI flash Rajendra Nayak (1): OMAP: powerdomains: Make all powerdomain target states as ON at init Santosh Shilimkar (1): OMAP: clockdomain: Wait for powerdomain to be ON when using clockdomain force wakeup Sergei Shtylyov (1): ARM: davinci: correct MDSTAT_STATE_MASK Tommy Lin (1): ARM: cns3xxx: Fix compile error caused by hardware.h removed
-Dave Airlie has drm fixes including a major nouveau regression fix, Jeremy Fitzhardinge
has a fix related to xen (“When starting a PV kernel under Xen with full boot-time
trace testing enabled, it crashes due to infinite recursion. In principle it could
happen at other times too (when just using preempt tracing perhaps?).
This fixes it.
BTW, I think this same problem also affects KVM.
Erm, I’m not sure how to authenticate this github as being really from
me; I’m signing the mail with my long-standing pgp key in the hope that
it helps… Also, the patch is self-evident.”), Paul E. McKenney
announces a temp location for the rcu tree until the kernel.org
issue is solved : https://github.com/paulmckrcu/linux and
Len Brown announces acpi patches for -rc6; it’s also temporarily
hosted on github – https://github.com/lenb/linux.git .
-Pekka Enberg announces the temp location of slab.git, until the
kernel.org issue is solved : you can find it here :
git://github.com/penberg/linux.git for-next .
-John Stultz updates alarmtimers for 3.2, which can be found
at git://git.linaro.org/people/jstultz/linux.git fortglx/3.2/tip/timers/alarmtimers :
John Stultz (8): alarmtimers: Change alarmtimer functions to return alarmtimer_restart values alarmtimers: Push rearming peroidic timers down into alamrtimer handler alarmtimers: Add alarm_forward functionality alarmtimers: Remove interval cap limit hack alarmtimers: Remove period from alarm structure alarmtimers: Add more refined alarm state tracking alarmtimers: Add try_to_cancel functionality alarmtimers: Rework RTC device selection using class interface
-Linus Torvalds announces 3.1-rc6 :
[ Heh. Somewhat delayed, but I literally didn't notice that all my outgoing email bounced for the last couple of days, so here it is again. Originally *meant* to be sent on Monday, just apparently never got anywhere. So when it says "I should have done this yesterday", it actually *means* Sunday ;^] So I should have done this yesterday, but I was distracted. So here it is, a day late: git://github.com/torvalds/linux.git with just over a hundred commits. It's been fairly quiet. Some arm and openrisc updates, various small driver fixes (the drm nvidia fixes might be the ones most noticeable to people), and some fuse, 9p and btrfs updates for filesystems. Nothing really stands out. Have at it, and let us know of any outstanding regressions, Linus --- Alex Deucher (1): drm/radeon/kms: fix DP detect and EDID fetch for DP bridges Andrey Vagin (1): x86, perf: Check that current->mm is alive before getting user callchain Aneesh Kumar K.V (5): fs/9p: Add fid before dentry instantiation fs/9p: Don't update file type when updating file attributes net/9p: Fix kernel crash with msize 512K fs/9p: Add OS dependent open flags in 9p protocol fs/9p: Always ask new inode in lookup for cache mode disabled Anton Vorontsov (1): ARM: cns3xxx: Fix newly introduced warnings in the PCIe code Artem Bityutskiy (1): UBI: do not link debug messages when debugging is disabled Axel Lin (2): rtc: ep93xx: Fix 'rtc' may be used uninitialized warning i2c-pxa2xx: return proper error code in ce4100_i2c_probe error paths Bart Van Assche (1): backlight: Declare backlight_types[] const Ben Skeggs (1): drm/nouveau: fix oops on pre-semaphore hardware Chase Douglas (1): HID: magicmouse: Set resolution of touch surfaces Clemens Werther (1): HID: add support for HuiJia USB Gamepad connector Dan Carpenter (1): [media] pwc: precedence bug in pwc_init_controls() David Herrmann (2): HID: wacom: Fix error path of power-supply initialization HID: wacom: Unregister sysfs attributes on remove David Sterba (1): btrfs: xattr: fix attribute removal David Vrabel (1): xen: use maximum reservation to limit amount of usable RAM Doug Anderson (1): i2c-tegra: fix possible race condition after tx Duncan Sands (1): KVM: Fix instruction size issue in pvclock scaling Emil Velikov (2): drm/nv50/crtc: Bail out if FB is not bound to crtc drm/nv04/crtc: Bail out if FB is not bound to crtc Eric B Munson (1): perf_event: Fix broken calc_timer_values() Florian Mickler (1): [media] vp7045: fix buffer setup Girish K S (1): mmc: sdhci-s3c: Fix mmc card I/O problem Guenter Roeck (2): hwmon: (max16065) Fix current calculation hwmon: (max16065) Add chip access warning to documentation Igor Mammedov (1): xen: x86_32: do not enable iterrupts when returning from exception in interrupt context Ilkka Koskinen (1): rtc: rtc-twl: Switch to using threaded irq Jamie Iles (1): ARM: CSR: add missing sentinels to of_device_id tables Janusz Krzysztofik (1): ARM: 7088/1: entry: fix wrong parameter name used in do_thumb_abort Jarod Wilson (1): [media] nuvoton-cir: simplify raw IR sample handling Jean Delvare (1): hwmon: (ucd9000/ucd9200) Optimize array walk Jean-François Moine (2): [media] gspca - ov519: Fix LED inversion of some ov519 webcams [media] gspca - sonixj: Fix the darkness of sensor om6802 in 320x240 Jesper Juhl (1): [media] [Resend] viacam: Don't explode if pci_find_bus() returns NULL Jim Garlick (1): fs/9p: Use protocol-defined value for lock/getlock 'type' field. Jiri Kosina (1): HID: magicmouse: ignore 'ivalid report id' while switching modes, v2 Joerg Roedel (2): iommu/amd: Make sure iommu->need_sync contains correct value iommu/amd: Don't take domain->lock recursivly John Bonesio (1): i2c-tegra: Add of_match_table John Stultz (4): alarmtimers: Avoid possible null pointer traversal alarmtimers: Memset itimerspec passed into alarm_timer_get alarmtimers: Avoid possible denial of service with high freq periodic timers rtc: Fix RTC PIE frequency limit Jon Mason (1): PCI: Remove MRRS modification from MPS setting code Jonas Bonn (2): openrisc: don't use pt_regs in struct sigcontext Add missing DMA ops Josef Bacik (1): Btrfs: skip locking if searching the commit root in csum lookup Kamil Debski (1): [media] v4l2: Fix documentation of the codec device controls Kevin Hilman (1): OMAP: omap_device: fix !CONFIG_SUSPEND case in _noirq handlers Konrad Rzeszutek Wilk (1): xen/smp: Warn user why they keel over - nosmp or noapic and what to use instead. Li Zefan (2): Btrfs: calc file extent num_bytes correctly in file clone Btrfs: add dummy extent if dst offset excceeds file end in Lin Ming (1): drm: Remove duplicate "return" statement Linus Torvalds (1): Linux 3.1-rc6 Linus Walleij (3): ARM: 7081/1: mach-integrator: fix the clocksource ARM: 7080/1: l2x0: make sure I&D are not locked down on init ARM: davinci: fix cache flush build error Liu Bo (3): Btrfs: fix an oops when deleting snapshots Btrfs: reset to appropriate block rsv after orphan operations Btrfs: fix misuse of trans block rsv Luiz Carlos Ramos (1): [media] gspca - sonixj: Fix wrong register mask for sensor om6802 Marcin Slusarz (2): drm/nouveau: properly handle allocation failure in nouveau_sgdma_populate drm/nouveau: fix nv04_sgdma_bind on non-"4kB pages" archs Mark Brown (1): regmap: Remove bitrotted module_put()s Mark Rutland (1): ARM: 7067/1: mm: keep significant bits in pfn_valid Mathieu Desnoyers (1): ioctl: register LTTng ioctl Miao Xie (3): Btrfs: fix unclosed transaction handle in btrfs_cont_expand Btrfs: fix the file extent gap when doing direct IO Btrfs: fix wrong nbytes information of the inode Michal Marek (1): UBIFS: not build debug messages with CONFIG_UBIFS_FS_DEBUG disabled Mika Westerberg (3): mmc: rename mmc_host_clk_{ungate|gate} to mmc_host_clk_{hold|release} mmc: core: prevent aggressive clock gating racing with ios updates mmc: core: use non-reentrant workqueue for clock gating Mike Rapoport (1): i2c-tegra: add I2C_FUNC_SMBUS_EMUL Mike Waychison (1): rtc: Initialized rtc_time->tm_isdst Miklos Szeredi (3): vfs: automount should ignore LOOKUP_FOLLOW fuse: fix flock breakage fuse: fix memory leak NeilBrown (4): Avoid dereferencing a 'request_queue' after last close. md/raid10: unify handling of write completion. md/raid1,10: Remove use-after-free bug in make_request. md: Fix handling for devices from 2TB to 4TB in 0.90 metadata. Noah Watkins (1): ceph: fix memory leak Paul Walmsley (4): OMAP4: clock: re-enable previous clockdomain enable/disable sequence OMAP4: clock: fix compile warning OMAP3: clock: indicate that gpt12_fck and wdt1_fck are in the WKUP clockdomain OMAP2430: hwmod: musb: add missing terminator to omap2430_usbhsotg_addrs[] Per Forlin (4): dmaengine/ste_dma40: add missing kernel doc for pending_queue dmaengine/ste_dma40: remove duplicate call to d40_pool_lli_free(). dmaengine/ste_dma40: fix Oops due to double free of client descriptor dmaengine/ste_dma40: fix memory leak due to prepared descriptors Rajashekhara, Sudhakar (1): ARM: davinci: da850 EVM: read mac address from SPI flash Rajendra Nayak (1): OMAP: powerdomains: Make all powerdomain target states as ON at init Randy Dunlap (3): wireless: fix kernel-doc warning in net/cfg80211.h regulator: fix kernel-doc warning in consumer.h scsi: qla4xxx driver depends on NET Russell King (1): NET: am79c961: fix race in link status code Sage Weil (3): libceph: fix msgpool ceph: fix encoding of ino only (not relative) paths libceph: fix leak of osd structs during shutdown Santosh Shilimkar (1): OMAP: clockdomain: Wait for powerdomain to be ON when using clockdomain force wakeup Sebastian Reichel (1): rtc: rtc-twl: Remove lockdep related local_irq_enable() Sergei Shtylyov (1): ARM: davinci: correct MDSTAT_STATE_MASK Sergei Trofimovich (1): btrfs: fix warning in iput for bad-inode Shawn Guo (1): mmc: sdhci-esdhc-imx: add missing inclusion of linux/module.h Shyam Iyer (1): Fix pointer dereference before call to pcie_bus_configure_settings Simon Horman (1): mmc: sdhi: initialise mmc_data->flags before use Stephane Eranian (1): perf events: Fix slow and broken cgroup context switch code Subhash Jadavani (1): mmc: sd: UHS-I bus speed should be set last in UHS initialization Thomas Gleixner (2): sched: Separate the scheduler entry for preemption sched: Move blk_schedule_flush_plug() out of __schedule() Todd Poynor (1): rtc: twl: Fix registration vs. init order Tommy Lin (1): ARM: cns3xxx: Fix compile error caused by hardware.h removed WANG Cong (1): sched: Fix a memory leak in __sdt_free()
-James Bottomley has scsi fixes for -rc6 :
Andrew Vasquez (1): qla2xxx: Correct inadvertent loop state transitions during port-update handling. Arun Easi (2): qla2xxx: T10 DIF - Fix incorrect error reporting. qla2xxx: T10 DIF - Handle uninitalized sectors. Chad Dupuis (3): qla2xxx: Update version number to 8.03.07.07-k. qla2xxx: Double check for command completion if abort mailbox command fails. qla2xxx: Fix qla24xx revision check while enabling interrupts. Dan Williams (5): isci: add version number isci: fix event-get pointer increment isci: dynamic interrupt coalescing isci: fix 32-bit operation when CONFIG_HIGHMEM64G=n isci: fix sata response handling Dave Jiang (2): isci: Adding documentation to API change and fixup sysfs registration isci: Update MAINTAINERS entry for the isci driver Eddie Wai (1): bnx2i: Fixed the endian on TTT for NOP out transmission Jeff Skirvin (1): isci: Leave requests alone if already terminating. Marcin Tomczak (1): isci: change sas phy timeouts from 54us to 59us Robert Love (1): fcoe: Fix deadlock between fip's recv_work and rtnl Saurav Kashyap (3): qla2xxx: Set the task attributes after memsetting fcp cmnd. qla2xxx: Save and restore irq in the response queue interrupt handler. qla2xxx: Acquire hardware lock while manipulating dsd list. Stephen M. Cameron (2): hpsa: fix physical device lun and target numbering problem hpsa: fix problem that OBDR devices are not detected Vasu Dev (2): libfc: block SCSI eh thread for blocked rports libfc: fix fc_eh_host_reset Yi Zou (1): libfc: fix referencing to fc_fcp_pkt from the frame pointer via fr_fsp()
-Trond Myklebust has nfs-client fixes, John W. Linville updates wireless
(“Felix Fietkau (1):
ath9k_hw: fix calibration on 5 ghz
George (2):
rtlwifi: rtl8192su: Fix problem connecting to HT-enabled AP
rtlwifi: Fix problem when switching connections
Johannes Berg (3):
mac80211: fix missing sta_lock in __sta_info_destroy
iwlagn: fix stack corruption
iwlagn: fix command queue timeout
John W. Linville (1):
Merge branch ‘master’ of git://git.infradead.org/users/linville/wireless into for-davem
Mohammed Shafi Shajakhan (1):
ath9k: Fix kernel panic on unplugging the device
Rajkumar Manoharan (1):
ath9k_hw: Fix init mode register regression
Stanislaw Gruszka (1):
iwlegacy: fix BUG_ON(info->control.rates[0].idx < 0) "),
Takashi Iwai has sound updates for -rc7 and Dmitry Torokhov announces the
new location of the input tree : https://github.com/dtor/input .
-Konrad Rzeszutek Wilk has xen stable/bug fixes for -rc6 :
which has fixes in: 1). The E820 setup code (which we are planning to cleanup in 3.2/3.3 time -frame as it is getting bigger and nastier). 2). Taking a spinlock while later calling the generic IRQ code which uses a mutex - causing the "BUG: you took spinlock while sleeping." Fortunately the fix is quite simple - s/spin/mutex/. 3). The Linux guest when it runs under HVM tries to enable as many PV things as it can. One of them is the spinlocks - but sadly we are doing it too late and end up with baremetal ticket spinlocks and PV byte locks running at the same time. Hilarity ensues with the guest locking up.. we will revisit this in 3.3 time-frame. 4). Lastly, we fix up the check for overflow and also add a WARN just in case it happens.
-Have a great weekend everyone, see ya!