- 25 Sep, 2024 27 commits
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Michael S. Tsirkin authored
This fixes the following issue discovered by code review: after vqs have been created, a buggy device can send an interrupt. A control vq callback will then try to schedule control_work which has not been initialized yet. Similarly for config interrupt. Further, in and out vq callbacks invoke find_port_by_vq which attempts to take ports_lock which also has not been initialized. To fix, init all locks and work before creating vqs. Message-ID: <ad982e975a6160ad110c623c016041311ca15b4f.1726511547.git.mst@redhat.com> Fixes: 17634ba2 ("virtio: console: Add a new MULTIPORT feature, support for generic ports") Signed-off-by:
Michael S. Tsirkin <mst@redhat.com>
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Michael S. Tsirkin authored
Setting event_triggered from the interrupt handler is fundamentally racy. There are races of 2 types: 1. vq processing can read false value while interrupt triggered and set it to true. result will be a bit of extra work when disabling cbs, no big deal. 1. vq processing can set false value then interrupt immediately sets true value since interrupt then triggers a callback which will process buffers, this is also not an issue. However, looks like KCSAN can not figure all this out, and warns about the race between the write and the read. Tag the access data_racy for now. We should probably look at ways to make this more straight-forwardly correct. Message-ID: <6bdd771a4fb7625a9227971b3cf4745c34c31a32.1726153334.git.mst@redhat.com> Reported-by: syzbot+8a02104389c2e0ef5049@syzkaller.appspotmail.com Signed-off-by:
Jason Wang <jasowang@redhat.com> Acked-by:
Marco Elver <elver@google.com>
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Srujana Challa authored
Updates the debug messages in octep_vdpa_hw.c to use the %p format specifier for pointers instead of casting them to u64. Fixes smatch warning: octep_hw_caps_read() warn: argument 3 to %016llx specifier is cast from pointer Fixes: 8b6c724c ("virtio: vdpa: vDPA driver for Marvell OCTEON DPU devices") Reported-by:
kernel test robot <lkp@intel.com> Reported-by:
Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/r/202409160431.bRhZWhiU-lkp@intel.com/Signed-off-by:
Srujana Challa <schalla@marvell.com> Message-Id: <20240916162255.677774-1-schalla@marvell.com> Signed-off-by:
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Luigi Leonardi authored
When the driver needs to send new packets to the device, it always queues the new sk_buffs into an intermediate queue (send_pkt_queue) and schedules a worker (send_pkt_work) to then queue them into the virtqueue exposed to the device. This increases the chance of batching, but also introduces a lot of latency into the communication. So we can optimize this path by adding a fast path to be taken when there is no element in the intermediate queue, there is space available in the virtqueue, and no other process that is sending packets (tx_lock held). The following benchmarks were run to check improvements in latency and throughput. The test bed is a host with Intel i7-10700KF CPU @ 3.80GHz and L1 guest running on QEMU/KVM with vhost process and all vCPUs pinned individually to pCPUs. - Latency Tool: Fio version 3.37-56 Mode: pingpong (h-g-h) Test runs: 50 Runtime-per-test: 50s Type: SOCK_STREAM In the following fio benchmark (pingpong mode) the host sends a payload to the guest and waits for the same payload back. fio process pinned both inside the host and the guest system. Before: Linux 6.9.8 Payload 64B: 1st perc. overall 99th perc. Before 12.91 16.78 42.24 us After 9.77 13.57 39.17 us Payload 512B: 1st perc. overall 99th perc. Before 13.35 17.35 41.52 us After 10.25 14.11 39.58 us Payload 4K: 1st perc. overall 99th perc. Before 14.71 19.87 41.52 us After 10.51 14.96 40.81 us - Throughput Tool: iperf-vsock The size represents the buffer length (-l) to read/write P represents the number of parallel streams P=1 4K 64K 128K Before 6.87 29.3 29.5 Gb/s After 10.5 39.4 39.9 Gb/s P=2 4K 64K 128K Before 10.5 32.8 33.2 Gb/s After 17.8 47.7 48.5 Gb/s P=4 4K 64K 128K Before 12.7 33.6 34.2 Gb/s After 16.9 48.1 50.5 Gb/s The performance improvement is related to this optimization, I used a ebpf kretprobe on virtio_transport_send_skb to check that each packet was sent directly to the virtqueue Co-developed-by:
Marco Pinna <marco.pinn95@gmail.com> Signed-off-by:
Luigi Leonardi <luigi.leonardi@outlook.com> Message-Id: <20240730-pinna-v4-2-5c9179164db5@outlook.com> Signed-off-by:
Stefano Garzarella <sgarzare@redhat.com>
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Marco Pinna authored
Preliminary patch to introduce an optimization to the enqueue system. All the code used to enqueue a packet into the virtqueue is removed from virtio_transport_send_pkt_work() and moved to the new virtio_transport_send_skb() function. Co-developed-by:
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Hongbo Li authored
This 'struct kobj_type' is not modified. It is only used in kobject_init_and_add() which takes a 'const struct kobj_type *ktype' parameter. Constifying this structure and moving it to a read-only section, and this can increase over all security. ``` [Before] text data bss dec hex filename 5974 1008 96 7078 1ba6 drivers/firmware/qemu_fw_cfg.o [After] text data bss dec hex filename 6038 944 96 7078 1ba6 drivers/firmware/qemu_fw_cfg.o ``` Signed-off-by:
Hongbo Li <lihongbo22@huawei.com> Message-Id: <20240904011743.2010319b-1-lihongbo22@huawei.com> Signed-off-by:
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Dragos Tatulea authored
Currently, when a new MR is set up, the old MR is deleted. MR deletion is about 30-40% the time of MR creation. As deleting the old MR is not important for the process of setting up the new MR, this operation can be postponed. This series adds a workqueue that does MR garbage collection at a later point. If the MR lock is taken, the handler will back off and reschedule. The exception during shutdown: then the handler must not postpone the work. Note that this is only a speculative optimization: if there is some mapping operation that is triggered while the garbage collector handler has the lock taken, this operation it will have to wait for the handler to finish. Signed-off-by:
Dragos Tatulea <dtatulea@nvidia.com> Reviewed-by:
Cosmin Ratiu <cratiu@nvidia.com> Message-Id: <20240830105838.2666587-9-dtatulea@nvidia.com> Signed-off-by:
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Dragos Tatulea authored
There's currently not a lot of action happening during the init/destroy of MR resources. But more will be added in the upcoming patches. As the mr mutex lock init/destroy has been moved to these new functions, the lifetime has now shifted away from mlx5_vdpa_alloc_resources() / mlx5_vdpa_free_resources() into these new functions. However, the lifetime at the outer scope remains the same: mlx5_vdpa_dev_add() / mlx5_vdpa_dev_free() Signed-off-by:
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Dragos Tatulea authored
Now that the mr resources have their own namespace in the struct, give the lock a clearer name. Signed-off-by:
Eugenio Pérez <eperezma@redhat.com> Message-Id: <20240830105838.2666587-7-dtatulea@nvidia.com> Signed-off-by:
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Dragos Tatulea authored
Group all mapping related resources into their own structure. Upcoming patches will add more members in this new structure. Signed-off-by:
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Dragos Tatulea authored
A followup patch will use this name for something else. Signed-off-by:
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Dragos Tatulea authored
Use the async interface to issue MTT MKEY deletion. This makes destroy_user_mr() on average 8x times faster. This number is also dependent on the size of the MR being deleted. Signed-off-by:
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Dragos Tatulea authored
Use the async interface to issue MTT MKEY creation. Extra care is taken at the allocation of FW input commands due to the MTT tables having variable sizes depending on MR. The indirect MKEY is still created synchronously at the end as the direct MKEYs need to be filled in. This makes create_user_mr() 3-5x faster, depending on the size of the MR. Signed-off-by:
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Stefano Garzarella authored
The virtio-vsock driver is already under VM SOCKETS (AF_VSOCK), managed pricipally with the net tree, and VIRTIO AND VHOST VSOCK DRIVER. However, changes that only affect the virtio part usually go with Michael's tree, so let's also put the driver in the VIRTIO CORE section to have its maintainers in CC for changes to the virtio-vsock driver. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Signed-off-by:
Stefan Hajnoczi <stefanha@redhat.com> Acked-by:
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Max Gurtovoy authored
Introduce sysfs entries to provide visibility to the multiple queues used by the Virtio FS device. This enhancement allows users to query information about these queues. Specifically, add two sysfs entries: 1. Queue name: Provides the name of each queue (e.g. hiprio/requests.8). 2. CPU list: Shows the list of CPUs that can process requests for each queue. The CPU list feature is inspired by similar functionality in the block MQ layer, which provides analogous sysfs entries for block devices. These new sysfs entries will improve observability and aid in debugging and performance tuning of Virtio FS devices. Reviewed-by:
Idan Zach <izach@nvidia.com> Reviewed-by:
Shai Malin <smalin@nvidia.com> Signed-off-by:
Max Gurtovoy <mgurtovoy@nvidia.com> Message-Id: <20240825130716.9506-2-mgurtovoy@nvidia.com> Signed-off-by:
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Max Gurtovoy authored
Introduce a new helper function virtio_fs_put_locked to encapsulate the common pattern of releasing a virtio_fs reference while holding a lock. The existing virtio_fs_put helper will be used to release a virtio_fs reference while not holding a lock. Also add an assertion in case the lock is not taken when it should. Reviewed-by:
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Yue Haibing authored
There is no caller and implementation in tree. Signed-off-by:
Yue Haibing <yuehaibing@huawei.com> Message-Id: <20240819140930.122019-1-yuehaibing@huawei.com> Signed-off-by:
Shannon Nelson <shannon.nelson@amd.com> Reviewed-by:
Zhu Lingshan <lingshan.zhu@kernel.org> Reviewed-by: Shannon Nelson <<a href="mailto:shannon.nelson@amd.com" target="_blank">shannon.nelson@amd.com</a>><br> Reviewed-by:
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Dragos Tatulea authored
change_num_qps() is still suspending/resuming VQs one by one. This change switches to parallel suspend/resume. When increasing the number of queues the flow has changed a bit for simplicity: the setup_vq() function will always be called before resume_vqs(). If the VQ is initialized, setup_vq() will exit early. If the VQ is not initialized, setup_vq() will create it and resume_vqs() will resume it. Signed-off-by:
Tariq Toukan <tariqt@nvidia.com> Message-Id: <20240816090159.1967650-11-dtatulea@nvidia.com> Signed-off-by:
Lei Yang <leiyang@redhat.com>
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Dragos Tatulea authored
change_num_qps() has a lot of multiplications by 2 to convert the number of VQ pairs to number of VQs. This patch simplifies the code by doing the VQP -> VQ count conversion at the beginning in a variable. Signed-off-by:
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Dragos Tatulea authored
Unregistering notifiers is a costly operation. Instead of removing the notifiers during device suspend and adding them back at resume, simply ignore the call when the device is suspended. At resume time call queue_link_work() to make sure that the device state is propagated in case there were changes. For 1 vDPA device x 32 VQs (16 VQPs) attached to a large VM (256 GB RAM, 32 CPUs x 2 threads per core), the device suspend time is reduced from ~13 ms to ~2.5 ms. Signed-off-by:
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Dragos Tatulea authored
Currently device resume works on vqs serially. Building up on previous changes that converted vq operations to the async api, this patch parallelizes the device resume. For 1 vDPA device x 32 VQs (16 VQPs) attached to a large VM (256 GB RAM, 32 CPUs x 2 threads per core), the device resume time is reduced from ~16 ms to ~4.5 ms. Signed-off-by:
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Dragos Tatulea authored
Currently device suspend works on vqs serially. Building up on previous changes that converted vq operations to the async api, this patch parallelizes the device suspend: 1) Suspend all active vqs parallel. 2) Query suspended vqs in parallel. For 1 vDPA device x 32 VQs (16 VQPs) attached to a large VM (256 GB RAM, 32 CPUs x 2 threads per core), the device suspend time is reduced from ~37 ms to ~13 ms. A later patch will remove the link unregister operation which will make it even faster. Signed-off-by:
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Dragos Tatulea authored
Switch firmware vq modify command to be issued via the async API to allow future parallelization. The new refactored function applies the modify on a range of vqs and waits for their execution to complete. For now the command is still used in a serial fashion. A later patch will switch to modifying multiple vqs in parallel. Signed-off-by:
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Dragos Tatulea authored
Switch firmware vq query command to be issued via the async API to allow future parallelization. For now the command is still serial but the infrastructure is there to issue commands in parallel, including ratelimiting the number of issued async commands to firmware. A later patch will switch to issuing more commands at a time. Signed-off-by:
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Dragos Tatulea authored
Introduce a new function mlx5_vdpa_exec_async_cmds() which wraps the mlx5_core async firmware command API in a way that will be used to parallelize certain operation in this driver. The wrapper deals with the case when mlx5_cmd_exec_cb() returns EBUSY due to the command being throttled. Signed-off-by:
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Dragos Tatulea authored
mlx5_vdpa_err() was missing. This patch adds it and uses it in the necessary places. Signed-off-by:
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Dragos Tatulea authored
Currently, commands that qualify as throttled can't be used via the async API. That's due to the fact that the throttle semaphore can sleep but the async API can't. This patch allows throttling in the async API by using the tentative variant of the semaphore and upon failure (semaphore at 0) returns EBUSY to signal to the caller that they need to wait for the completion of previously issued commands. Furthermore, make sure that the semaphore is released in the callback. Signed-off-by:
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- 10 Sep, 2024 10 commits
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Cindy Lu authored
Add the function to support setting the MAC address. For vdpa/mlx5, the function will use mlx5_mpfs_add_mac to set the mac address Tested in ConnectX-6 Dx device Signed-off-by:
Cindy Lu <lulu@redhat.com> Message-Id: <20240731031653.1047692-4-lulu@redhat.com> Signed-off-by:
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Cindy Lu authored
Add the function to support setting the MAC address. For vdpa_sim_net, the driver will write the MAC address to the config space, and other devices can implement their own functions to support this. Signed-off-by:
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Cindy Lu authored
Add new UAPI to support the mac address from vdpa tool Function vdpa_nl_cmd_dev_attr_set_doit() will get the new MAC address from the vdpa tool and then set it to the device. The usage is: vdpa dev set name vdpa_name mac **:**:**:**:**:** Here is example: root@L1# vdpa -jp dev config show vdpa0 { "config": { "vdpa0": { "mac": "82:4d:e9:5d:d7:e6", "link ": "up", "link_announce ": false, "mtu": 1500 } } } root@L1# vdpa dev set name vdpa0 mac 00:11:22:33:44:55 root@L1# vdpa -jp dev config show vdpa0 { "config": { "vdpa0": { "mac": "00:11:22:33:44:55", "link ": "up", "link_announce ": false, "mtu": 1500 } } } Signed-off-by: -
Zhu Jun authored
The unsigned int should use "%u" instead of "%d". Signed-off-by:
Zhu Jun <zhujun2@cmss.chinamobile.com> Message-Id: <20240724074108.9530-1-zhujun2@cmss.chinamobile.com> Signed-off-by:
Xuan Zhuo <xuanzhuo@linux.alibaba.com>
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zhenwei pi authored
Expose memory scan/reclaim information to the host side via virtio balloon device. Now we have a metric to analyze the memory performance: y: counter increases n: counter does not changes h: the rate of counter change is high l: the rate of counter change is low OOM: VIRTIO_BALLOON_S_OOM_KILL STALL: VIRTIO_BALLOON_S_ALLOC_STALL ASCAN: VIRTIO_BALLOON_S_SCAN_ASYNC DSCAN: VIRTIO_BALLOON_S_SCAN_DIRECT ARCLM: VIRTIO_BALLOON_S_RECLAIM_ASYNC DRCLM: VIRTIO_BALLOON_S_RECLAIM_DIRECT - OOM[y], STALL[*], ASCAN[*], DSCAN[*], ARCLM[*], DRCLM[*]: the guest runs under really critial memory pressure - OOM[n], STALL[h], ASCAN[*], DSCAN[l], ARCLM[*], DRCLM[l]: the memory allocation stalls due to cgroup, not the global memory pressure. - OOM[n], STALL[h], ASCAN[*], DSCAN[h], ARCLM[*], DRCLM[h]: the memory allocation stalls due to global memory pressure. The performance gets hurt a lot. A high ratio between DRCLM/DSCAN shows quite effective memory reclaiming. - OOM[n], STALL[h], ASCAN[*], DSCAN[h], ARCLM[*], DRCLM[l]: the memory allocation stalls due to global memory pressure. the ratio between DRCLM/DSCAN gets low, the guest OS is thrashing heavily, the serious case leads poor performance and difficult trouble shooting. Ex, sshd may block on memory allocation when accepting new connections, a user can't login a VM by ssh command. - OOM[n], STALL[n], ASCAN[h], DSCAN[n], ARCLM[l], DRCLM[n]: the low ratio between ARCLM/ASCAN shows that the guest tries to reclaim more memory, but it can't. Once more memory is required in future, it will struggle to reclaim memory. Acked-by:
David Hildenbrand <david@redhat.com> Signed-off-by:
zhenwei pi <pizhenwei@bytedance.com> Message-Id: <20240423034109.1552866-5-pizhenwei@bytedance.com> Signed-off-by:
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zhenwei pi authored
Memory allocation stall counter represents the performance/latency of memory allocation, expose this counter to the host side by virtio balloon device via out-of-bound way. Acked-by:
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zhenwei pi authored
When the guest OS runs under critical memory pressure, the guest starts to kill processes. A guest monitor agent may scan 'oom_kill' from /proc/vmstat, and reports the OOM KILL event. However, the agent may be killed and we will loss this critical event(and the later events). For now we can also grep for magic words in guest kernel log from host side. Rather than this unstable way, virtio balloon reports OOM-KILL invocations instead. Acked-by:
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Philip Chen authored
If a pmem device is in a bad status, the driver side could wait for host ack forever in virtio_pmem_flush(), causing the system to hang. So add a status check in the beginning of virtio_pmem_flush() to return early if the device is not activated. Signed-off-by:
Philip Chen <philipchen@chromium.org> Message-Id: <20240826215313.2673566-1-philipchen@chromium.org> Signed-off-by:
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Jason Wang authored
We used to call irq_bypass_unregister_producer() in vhost_vdpa_setup_vq_irq() which is problematic as we don't know if the token pointer is still valid or not. Actually, we use the eventfd_ctx as the token so the life cycle of the token should be bound to the VHOST_SET_VRING_CALL instead of vhost_vdpa_setup_vq_irq() which could be called by set_status(). Fixing this by setting up irq bypass producer's token when handling VHOST_SET_VRING_CALL and un-registering the producer before calling vhost_vring_ioctl() to prevent a possible use after free as eventfd could have been released in vhost_vring_ioctl(). And such registering and unregistering will only be done if DRIVER_OK is set. Reported-by:
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Dragos Tatulea authored
Certain error paths from mlx5_vdpa_dev_add() can end up releasing mr resources which never got initialized in the first place. This patch adds the missing check in mlx5_vdpa_destroy_mr_resources() to block releasing non-initialized mr resources. Reference trace: mlx5_core 0000:08:00.2: mlx5_vdpa_dev_add:3274:(pid 2700) warning: No mac address provisioned? BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 140216067 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 8 PID: 2700 Comm: vdpa Kdump: loaded Not tainted 5.14.0-496.el9.x86_64 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:vhost_iotlb_del_range+0xf/0xe0 [vhost_iotlb] Code: [...] RSP: 0018:ff1c823ac23077f0 EFLAGS: 00010246 RAX: ffffffffc1a21a60 RBX: ffffffff899567a0 RCX: 0000000000000000 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000000000000 RBP: ff1bda1f7c21e800 R08: 0000000000000000 R09: ff1c823ac2307670 R10: ff1c823ac2307668 R11: ffffffff8a9e7b68 R12: 0000000000000000 R13: 0000000000000000 R14: ff1bda1f43e341a0 R15: 00000000ffffffea FS: 00007f56eba7c740(0000) GS:ff1bda269f800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000104d90001 CR4: 0000000000771ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: ? show_trace_log_lvl+0x1c4/0x2df ? show_trace_log_lvl+0x1c4/0x2df ? mlx5_vdpa_free+0x3d/0x150 [mlx5_vdpa] ? __die_body.cold+0x8/0xd ? page_fault_oops+0x134/0x170 ? __irq_work_queue_local+0x2b/0xc0 ? irq_work_queue+0x2c/0x50 ? exc_page_fault+0x62/0x150 ? asm_exc_page_fault+0x22/0x30 ? __pfx_mlx5_vdpa_free+0x10/0x10 [mlx5_vdpa] ? vhost_iotlb_del_range+0xf/0xe0 [vhost_iotlb] mlx5_vdpa_free+0x3d/0x150 [mlx5_vdpa] vdpa_release_dev+0x1e/0x50 [vdpa] device_release+0x31/0x90 kobject_cleanup+0x37/0x130 mlx5_vdpa_dev_add+0x2d2/0x7a0 [mlx5_vdpa] vdpa_nl_cmd_dev_add_set_doit+0x277/0x4c0 [vdpa] genl_family_rcv_msg_doit+0xd9/0x130 genl_family_rcv_msg+0x14d/0x220 ? __pfx_vdpa_nl_cmd_dev_add_set_doit+0x10/0x10 [vdpa] ? _copy_to_user+0x1a/0x30 ? move_addr_to_user+0x4b/0xe0 genl_rcv_msg+0x47/0xa0 ? __import_iovec+0x46/0x150 ? __pfx_genl_rcv_msg+0x10/0x10 netlink_rcv_skb+0x54/0x100 genl_rcv+0x24/0x40 netlink_unicast+0x245/0x370 netlink_sendmsg+0x206/0x440 __sys_sendto+0x1dc/0x1f0 ? do_read_fault+0x10c/0x1d0 ? do_pte_missing+0x10d/0x190 __x64_sys_sendto+0x20/0x30 do_syscall_64+0x5c/0xf0 ? __count_memcg_events+0x4f/0xb0 ? mm_account_fault+0x6c/0x100 ? handle_mm_fault+0x116/0x270 ? do_user_addr_fault+0x1d6/0x6a0 ? do_syscall_64+0x6b/0xf0 ? clear_bhb_loop+0x25/0x80 ? clear_bhb_loop+0x25/0x80 ? clear_bhb_loop+0x25/0x80 ? clear_bhb_loop+0x25/0x80 ? clear_bhb_loop+0x25/0x80 entry_SYSCALL_64_after_hwframe+0x78/0x80 Fixes: 512c0cdd ("vdpa/mlx5: Decouple cvq iotlb handling from hw mapping code") Signed-off-by:
Si-Wei Liu <si-wei.liu@oracle.com> Acked-by:
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- 01 Sep, 2024 3 commits
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Linus Torvalds authored
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git://git.samba.org/sfrench/cifs-2.6Linus Torvalds authored
Pull smb client fixes from Steve French: - copy_file_range fix - two read fixes including read past end of file rc fix and read retry crediting fix - falloc zero range fix * tag 'v6.11-rc5-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6: cifs: Fix FALLOC_FL_ZERO_RANGE to preflush buffered part of target region cifs: Fix copy offload to flush destination region netfs, cifs: Fix handling of short DIO read cifs: Fix lack of credit renegotiation on read retry
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https://github.com/koverstreet/bcachefsLinus Torvalds authored
Push bcachefs fixes from Kent Overstreet: "The data corruption in the buffered write path is troubling; inode lock should not have been able to cause that... - Fix a rare data corruption in the rebalance path, caught as a nonce inconsistency on encrypted filesystems - Revert lockless buffered write path - Mark more errors as autofix" * tag 'bcachefs-2024-08-21' of https://github.com/koverstreet/bcachefs: bcachefs: Mark more errors as autofix bcachefs: Revert lockless buffered IO path bcachefs: Fix bch2_extents_match() false positive bcachefs: Fix failure to return error in data_update_index_update()
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