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2018-09-30SUNRPC: Turn off throttling of RPC slots for TCP socketsTrond Myklebust3-16/+1
The theory was that we would need to grab the socket lock anyway, so we might as well use it to gate the allocation of RPC slots for a TCP socket. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Allow soft RPC calls to time out when waiting for the XPRT_LOCKTrond Myklebust1-2/+2
This no longer causes them to lose their place in the transmission queue. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Allow calls to xprt_transmit() to drain the entire transmit queueTrond Myklebust1-11/+60
Rather than forcing each and every RPC task to grab the socket write lock in order to send itself, we allow whichever task is holding the write lock to attempt to drain the entire transmit queue. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Enqueue swapper tagged RPCs at the head of the transmit queueTrond Myklebust1-0/+11
Avoid memory starvation by giving RPCs that are tagged with the RPC_TASK_SWAPPER flag the highest priority. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Support for congestion control when queuing is enabledTrond Myklebust6-36/+109
Both RDMA and UDP transports require the request to get a "congestion control" credit before they can be transmitted. Right now, this is done when the request locks the socket. We'd like it to happen when a request attempts to be transmitted for the first time. In order to support retransmission of requests that already hold such credits, we also want to ensure that they get queued first, so that we don't deadlock with requests that have yet to obtain a credit. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Improve latency for interactive tasksTrond Myklebust2-3/+25
One of the intentions with the priority queues was to ensure that no single process can hog the transport. The field task->tk_owner therefore identifies the RPC call's origin, and is intended to allow the RPC layer to organise queues for fairness. This commit therefore modifies the transmit queue to group requests by task->tk_owner, and ensures that we round robin among those groups. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Move RPC retransmission stat counter to xprt_transmit()Trond Myklebust2-13/+12
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Simplify xprt_prepare_transmit()Trond Myklebust1-16/+7
Remove the checks for whether or not we need to transmit, and whether or not a reply has been received. Those are already handled in call_transmit() itself. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Don't reset the request 'bytes_sent' counter when releasing XPRT_LOCKTrond Myklebust2-18/+0
If the request is still on the queue, this will be incorrect behaviour. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Treat the task and request as separate in the xprt_ops->send_request()Trond Myklebust5-21/+18
When we shift to using the transmit queue, then the task that holds the write lock will not necessarily be the same as the one being transmitted. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Fix up the back channel transmitTrond Myklebust3-15/+32
Fix up the back channel code to recognise that it has already been transmitted, so does not need to be called again. Also ensure that we set req->rq_task. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Refactor RPC call encodingTrond Myklebust3-41/+63
Move the call encoding so that it occurs before the transport connection etc. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Add a transmission queue for RPC requestsTrond Myklebust3-13/+83
Add the queue that will enforce the ordering of RPC task transmission. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Distinguish between the slot allocation list and receive queueTrond Myklebust2-8/+13
When storing a struct rpc_rqst on the slot allocation list, we currently use the same field 'rq_list' as we use to store the request on the receive queue. Since the structure is never on both lists at the same time, this is OK. However, for clarity, let's make that a union with different names for the different lists so that we can more easily distinguish between the two states. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Minor cleanup for call_transmit()Trond Myklebust1-17/+15
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Refactor xprt_transmit() to remove wait for reply codeTrond Myklebust3-31/+54
Allow the caller in clnt.c to call into the code to wait for a reply after calling xprt_transmit(). Again, the reason is that the backchannel code does not need this functionality. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Refactor xprt_transmit() to remove the reply queue codeTrond Myklebust5-46/+89
Separate out the action of adding a request to the reply queue so that the backchannel code can simply skip calling it altogether. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Rename xprt->recv_lock to xprt->queue_lockTrond Myklebust6-38/+38
We will use the same lock to protect both the transmit and receive queues. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Don't wake queued RPC calls multiple times in xprt_transmitTrond Myklebust1-6/+3
Rather than waking up the entire queue of RPC messages a second time, just wake up the task that was put to sleep. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Test whether the task is queued before grabbing the queue spinlocksTrond Myklebust1-0/+4
When asked to wake up an RPC task, it makes sense to test whether or not the task is still queued. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Add a helper to wake up a sleeping rpc_task and set its statusTrond Myklebust2-10/+58
Add a helper that will wake up a task that is sleeping on a specific queue, and will set the value of task->tk_status. This is mainly intended for use by the transport layer to notify the task of an error condition. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Refactor the transport request pinningTrond Myklebust3-22/+25
We are going to need to pin for both send and receive. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Simplify dealing with aborted partially transmitted messagesTrond Myklebust1-26/+25
If the previous message was only partially transmitted, we need to close the socket in order to avoid corruption of the message stream. To do so, we currently hijack the unlocking of the socket in order to schedule the close. Now that we track the message offset in the socket state, we can move that kind of checking out of the socket lock code, which is needed to allow messages to remain queued after dropping the socket lock. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Add socket transmit queue offset trackingTrond Myklebust2-18/+29
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Move reset of TCP state variables into the reconnect codeTrond Myklebust1-7/+6
Rather than resetting state variables in socket state_change() callback, do it in the sunrpc TCP connect function itself. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Rename TCP receive-specific state variablesTrond Myklebust3-101/+103
Since we will want to introduce similar TCP state variables for the transmission of requests, let's rename the existing ones to label that they are for the receive side. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Avoid holding locks across the XDR encoding of the RPC messageTrond Myklebust1-3/+3
Currently, we grab the socket bit lock before we allow the message to be XDR encoded. That significantly slows down the transmission rate, since we serialise on a potentially blocking operation. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Simplify identification of when the message send/receive is completeTrond Myklebust3-17/+25
Add states to indicate that the message send and receive are not yet complete. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: The transmitted message must lie in the RPCSEC window of validityTrond Myklebust6-0/+64
If a message has been encoded using RPCSEC_GSS, the server is maintaining a window of sequence numbers that it considers valid. The client should normally be tracking that window, and needs to verify that the sequence number used by the message being transmitted still lies inside the window of validity. So far, we've been able to assume this condition would be realised automatically, since the client has been encoding the message only after taking the socket lock. Once we change that condition, we will need the explicit check. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: If there is no reply expected, bail early from call_decodeTrond Myklebust1-5/+8
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30SUNRPC: Clean up initialisation of the struct rpc_rqstTrond Myklebust3-42/+51
Move the initialisation back into xprt.c. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-09-30Linux 4.19-rc6v4.19-rc6Greg Kroah-Hartman1-1/+1
2018-09-30Merge tag 'auxdisplay-for-greg-v4.19-rc6' of https://github.com/ojeda/linuxGreg Kroah-Hartman1-1/+1
Miguel writes: "A trivial fix for auxdisplay - MAINTAINERS reference fix for moved file Reported by Joe Perches" * tag 'auxdisplay-for-greg-v4.19-rc6' of https://github.com/ojeda/linux: MAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.c
2018-09-30Merge tag 'libnvdimm-fixes2-4.19-rc6' of ↵Greg Kroah-Hartman1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Dan writes: "filesystem-dax for 4.19-rc6 Fix a deadlock in the new for 4.19 dax_lock_mapping_entry() routine." * tag 'libnvdimm-fixes2-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: dax: Fix deadlock in dax_lock_mapping_entry()
2018-09-30MAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.cMiguel Ojeda1-1/+1
Commit 51c1e9b554c9 ("auxdisplay: Move panel.c to drivers/auxdisplay folder") moved the file, but the MAINTAINERS reference was not updated. Link: https://lore.kernel.org/lkml/20180928220131.31075-1-joe@perches.com/ Reported-by: Joe Perches <joe@perches.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
2018-09-30Merge tag 'for-linus-20180929' of git://git.kernel.dk/linux-blockGreg Kroah-Hartman8-19/+25
Jens writes: "Block fixes for 4.19-rc6 A set of fixes that should go into this release. This pull request contains: - A fix (hopefully) for the persistent grants for xen-blkfront. A previous fix from this series wasn't complete, hence reverted, and this one should hopefully be it. (Boris Ostrovsky) - Fix for an elevator drain warning with SMR devices, which is triggered when you switch schedulers (Damien) - bcache deadlock fix (Guoju Fang) - Fix for the block unplug tracepoint, which has had the timer/explicit flag reverted since 4.11 (Ilya) - Fix a regression in this series where the blk-mq timeout hook is invoked with the RCU read lock held, hence preventing it from blocking (Keith) - NVMe pull from Christoph, with a single multipath fix (Susobhan Dey)" * tag 'for-linus-20180929' of git://git.kernel.dk/linux-block: xen/blkfront: correct purging of persistent grants Revert "xen/blkfront: When purging persistent grants, keep them in the buffer" blk-mq: I/O and timer unplugs are inverted in blktrace bcache: add separate workqueue for journal_write to avoid deadlock xen/blkfront: When purging persistent grants, keep them in the buffer block: fix deadline elevator drain for zoned block devices blk-mq: Allow blocking queue tag iter callbacks nvme: properly propagate errors in nvme_mpath_init
2018-09-30Merge branch 'x86-urgent-for-linus' of ↵Greg Kroah-Hartman1-19/+0
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Thomas writes: "A single fix for the AMD memory encryption boot code so it does not read random garbage instead of the cached encryption bit when a kexec kernel is allocated above the 32bit address limit." * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/boot: Fix kexec booting failure in the SEV bit detection code
2018-09-30Merge branch 'timers-urgent-for-linus' of ↵Greg Kroah-Hartman3-13/+28
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Thomas writes: "Three small fixes for clocksource drivers: - Proper error handling in the Atmel PIT driver - Add CLOCK_SOURCE_SUSPEND_NONSTOP for TI SoCs so suspend works again - Fix the next event function for Facebook Backpack-CMM BMC chips so usleep(100) doesnt sleep several milliseconds" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: clocksource/drivers/timer-atmel-pit: Properly handle error cases clocksource/drivers/fttmr010: Fix set_next_event handler clocksource/drivers/ti-32k: Add CLOCK_SOURCE_SUSPEND_NONSTOP flag for non-am43 SoCs
2018-09-29Merge branch 'perf-urgent-for-linus' of ↵Greg Kroah-Hartman1-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Thomas writes: "A single fix for a missing sanity check when a pinned event is tried to be read on the wrong CPU due to a legit event scheduling failure." * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/core: Add sanity check to deal with pinned event failure
2018-09-29Merge tag 'pm-4.19-rc6' of ↵Greg Kroah-Hartman1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Rafael writes: "Power management fix for 4.19-rc6 Fix incorrect __init and __exit annotations in the Qualcomm Kryo cpufreq driver (Nathan Chancellor)." * tag 'pm-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: cpufreq: qcom-kryo: Fix section annotations
2018-09-29cpufreq: qcom-kryo: Fix section annotationsNathan Chancellor1-2/+2
There is currently a warning when building the Kryo cpufreq driver into the kernel image: WARNING: vmlinux.o(.text+0x8aa424): Section mismatch in reference from the function qcom_cpufreq_kryo_probe() to the function .init.text:qcom_cpufreq_kryo_get_msm_id() The function qcom_cpufreq_kryo_probe() references the function __init qcom_cpufreq_kryo_get_msm_id(). This is often because qcom_cpufreq_kryo_probe lacks a __init annotation or the annotation of qcom_cpufreq_kryo_get_msm_id is wrong. Remove the '__init' annotation from qcom_cpufreq_kryo_get_msm_id so that there is no more mismatch warning. Additionally, Nick noticed that the remove function was marked as '__init' when it should really be marked as '__exit'. Fixes: 46e2856b8e18 (cpufreq: Add Kryo CPU scaling driver) Fixes: 5ad7346b4ae2 (cpufreq: kryo: Add module remove and exit) Reported-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: 4.18+ <stable@vger.kernel.org> # 4.18+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-09-29Merge tag 'dma-mapping-4.19-3' of git://git.infradead.org/users/hch/dma-mappingGreg Kroah-Hartman1-0/+3
Christoph writes: "dma mapping fix for 4.19-rc6 fix a missing Kconfig symbol for commits introduced in 4.19-rc" * tag 'dma-mapping-4.19-3' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: add the missing ARCH_HAS_SYNC_DMA_FOR_CPU_ALL declaration
2018-09-29Merge branch 'for-linus' of ↵Greg Kroah-Hartman5-48/+38
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Dmitry writes: "Input updates for v4.19-rc5 Just a few driver fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: uinput - allow for max == min during input_absinfo validation Input: elantech - enable middle button of touchpad on ThinkPad P72 Input: atakbd - fix Atari CapsLock behaviour Input: atakbd - fix Atari keymap Input: egalax_ts - add system wakeup support Input: gpio-keys - fix a documentation index issue
2018-09-29Merge tag 'spi-fix-v4.19-rc5' of ↵Greg Kroah-Hartman5-18/+86
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Mark writes: "spi: Fixes for v4.19 Quite a few fixes for the Renesas drivers in here, plus a fix for the Tegra driver and some documentation fixes for the recently added spi-mem code. The Tegra fix is relatively large but fairly straightforward and mechanical, it runs on probe so it's been reasonably well covered in -next testing." * tag 'spi-fix-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: spi: spi-mem: Move the DMA-able constraint doc to the kerneldoc header spi: spi-mem: Add missing description for data.nbytes field spi: rspi: Fix interrupted DMA transfers spi: rspi: Fix invalid SPI use during system suspend spi: sh-msiof: Fix handling of write value for SISTR register spi: sh-msiof: Fix invalid SPI use during system suspend spi: gpio: Fix copy-and-paste error spi: tegra20-slink: explicitly enable/disable clock
2018-09-29Merge tag 'regulator-v4.19-rc5' of ↵Greg Kroah-Hartman5-10/+54
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Mark writes: "regulator: Fixes for 4.19 A collection of fairly minor bug fixes here, a couple of driver specific ones plus two core fixes. There's one fix for the new suspend state code which fixes some confusion with constant values that are supposed to indicate noop operation and another fixing a race condition with the creation of sysfs files on new regulators." * tag 'regulator-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: fix crash caused by null driver data regulator: Fix 'do-nothing' value for regulators without suspend state regulator: da9063: fix DT probing with constraints regulator: bd71837: Disable voltage monitoring for LDO3/4
2018-09-29Merge tag 'powerpc-4.19-3' of ↵Greg Kroah-Hartman26-9/+55
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Michael writes: "powerpc fixes for 4.19 #3 A reasonably big batch of fixes due to me being away for a few weeks. A fix for the TM emulation support on Power9, which could result in corrupting the guest r11 when running under KVM. Two fixes to the TM code which could lead to userspace GPR corruption if we take an SLB miss at exactly the wrong time. Our dynamic patching code had a bug that meant we could patch freed __init text, which could lead to corrupting userspace memory. csum_ipv6_magic() didn't work on little endian platforms since we optimised it recently. A fix for an endian bug when reading a device tree property telling us how many storage keys the machine has available. Fix a crash seen on some configurations of PowerVM when migrating the partition from one machine to another. A fix for a regression in the setup of our CPU to NUMA node mapping in KVM guests. A fix to our selftest Makefiles to make them work since a recent change to the shared Makefile logic." * tag 'powerpc-4.19-3' of https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: selftests/powerpc: Fix Makefiles for headers_install change powerpc/numa: Use associativity if VPHN hcall is successful powerpc/tm: Avoid possible userspace r1 corruption on reclaim powerpc/tm: Fix userspace r13 corruption powerpc/pseries: Fix unitialized timer reset on migration powerpc/pkeys: Fix reading of ibm, processor-storage-keys property powerpc: fix csum_ipv6_magic() on little endian platforms powerpc/powernv/ioda2: Reduce upper limit for DMA window size (again) powerpc: Avoid code patching freed init sections KVM: PPC: Book3S HV: Fix guest r11 corruption with POWER9 TM workarounds
2018-09-29Merge tag 'pinctrl-v4.19-4' of ↵Greg Kroah-Hartman3-55/+43
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Linus writes: "Pin control fixes for v4.19: - Fixes to x86 hardware: - AMD interrupt debounce issues - Faulty Intel cannonlake register offset - Revert pin translation IRQ locking" * tag 'pinctrl-v4.19-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: Revert "pinctrl: intel: Do pin translation when lock IRQ" pinctrl: cannonlake: Fix HOSTSW_OWN register offset of H variant pinctrl/amd: poll InterruptEnable bits in amd_gpio_irq_set_type
2018-09-28perf/core: Add sanity check to deal with pinned event failureReinette Chatre1-0/+6
It is possible that a failure can occur during the scheduling of a pinned event. The initial portion of perf_event_read_local() contains the various error checks an event should pass before it can be considered valid. Ensure that the potential scheduling failure of a pinned event is checked for and have a credible error. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: fenghua.yu@intel.com Cc: tony.luck@intel.com Cc: acme@kernel.org Cc: gavin.hindman@intel.com Cc: jithu.joseph@intel.com Cc: dave.hansen@intel.com Cc: hpa@zytor.com Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/6486385d1f30336e9973b24c8c65f5079543d3d3.1537377064.git.reinette.chatre@intel.com
2018-09-28Merge tag 'drm-fixes-2018-09-28' of git://anongit.freedesktop.org/drm/drmGreg Kroah-Hartman17-52/+217
Dave writes: "drm fixes for 4.19-rc6 Looks like a pretty normal week for graphics, core: syncobj fix, panel link regression revert amd: suspend/resume fixes, EDID emulation fix mali-dp: NV12 writeback and vblank reset fixes etnaviv: DMA setup fix" * tag 'drm-fixes-2018-09-28' of git://anongit.freedesktop.org/drm/drm: drm/amd/display: Fix Edid emulation for linux drm/amd/display: Fix Vega10 lightup on S3 resume drm/amdgpu: Fix vce work queue was not cancelled when suspend Revert "drm/panel: Add device_link from panel device to DRM device" drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set drm/malidp: Fix writeback in NV12 drm: mali-dp: Call drm_crtc_vblank_reset on device init drm/etnaviv: add DMA configuration for etnaviv platform device
2018-09-28Merge tag 'riscv-for-linus-4.19-rc6' of ↵Greg Kroah-Hartman1-0/+7
git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux Palmer writes: "A Single RISC-V Update for 4.19-rc6 The Debian guys have been pushing on our port and found some unversioned symbols leaking into modules. This PR contains a single fix for that issue." * tag 'riscv-for-linus-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux: RISC-V: include linux/ftrace.h in asm-prototypes.h
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