- 21 Jun, 2019 25 commits
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Minwoo Im authored
This patch introduces target-side request tracing. As Christoph suggested, the trace would not be in a core or module to avoid disadvantages like cache miss: http://lists.infradead.org/pipermail/linux-nvme/2019-June/024721.html The target-side trace code is entirely based on the Johannes's trace code from the host side. It has lots of codes duplicated, but it would be better than having advantages mentioned above. It also traces not only fabrics commands, but also nvme normal commands. Once the codes to be shared gets bigger, then we can make it common as suggsted. This also removed the create_sq and create_cq trace parsing functions because it will be done by the connect fabrics command. Example: echo 1 > /sys/kernel/debug/tracing/event/nvmet/nvmet_req_init/enable echo 1 > /sys/kernel/debug/tracing/event/nvmet/nvmet_req_complete/enable cat /sys/kernel/debug/tracing/trace Signed-off-by:
Minwoo Im <minwoo.im.dev@gmail.com> [hch: fixed the symbol namespace and a an endianess conversion] Signed-off-by:
Christoph Hellwig <hch@lst.de>
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Minwoo Im authored
The "result" field is in 64bit to be printed out which means it could be like: nvme_complete_rq: nvme0: qid=0, cmdid=0, res=18446612684158962624, etries=0, flags=0x0, status=0 Switch both the result and status field to be printed in hexadecimal format to be easier to read. Signed-off-by:
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Minwoo Im authored
This patch introduces fabrics commands tracing feature from host-side. This patch does not include any changes for the previous host-side tracing, but just add fabrics commands parsing in cmd=() format. Signed-off-by:
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Minwoo Im authored
The following patches are going to provide the target-side trace which might need these kind of macros. It would be great if it can be shared between host and target side both. Signed-off-by:
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Minwoo Im authored
nvme_trace_disk_name() is now already being invoked with the function prototype in trace.h. We don't need to export this symbol at all. The following patches are going to provide target-side trace feature with the exactly same function with this so that this patch removes the EXPORT_SYMBOL() for this function. Signed-off-by:
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by:
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Chaitanya Kulkarni authored
Remove the status parameter o nvme_remove_dead_ctrl(), which is only used for printing it. We move the print message to the same function where actual error is occurring. Signed-off-by:
Sagi Grimberg <sagi@grimberg.me> Signed-off-by:
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Minwoo Im authored
If the state change to NVME_CTRL_CONNECTING fails, the dmesg is going to be like: [ 293.689160] nvme nvme0: failed to mark controller CONNECTING [ 293.689160] nvme nvme0: Removing after probe failure status: 0 Even it prints the first line to indicate the situation, the second line is not proper because the status is 0 which means normally success of the previous operation. This patch makes it indicate the proper error value when it fails. [ 25.932367] nvme nvme0: failed to mark controller CONNECTING [ 25.932369] nvme nvme0: Removing after probe failure status: -16 This situation is able to be easily reproduced by: root@target:~# rmmod nvme && modprobe nvme && rmmod nvme Signed-off-by:
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Chaitanya Kulkarni authored
This patch removes the confusing assignment of the variable result at the time of declaration and sets the value in error cases next to the places where the actual error is happening. Here we also set the result value to -ENODEV when we fail at the final ctrl state transition in nvme_reset_work(). Without this assignment result will hold 0 from nvme_setup_io_queue() and on failure 0 will be passed to he nvme_remove_dead_ctrl() from final state transition. Signed-off-by:
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Minwoo Im authored
If the "irq_queues" are greater than num_possible_cpus(), nvme_calc_irq_sets() can have irq set_size for HCTX_TYPE_DEFAULT greater than it can be afforded. 2039 affd->set_size[HCTX_TYPE_DEFAULT] = nrirqs - nr_read_queues; It might cause a WARN() from the irq_build_affinity_masks() like [1]: 220 if (nr_present < numvecs) 221 WARN_ON(nr_present + nr_others < numvecs); This patch prevents it from the WARN() by adjusting the max_vector value from the nvme_setup_irqs(). [1] WARN messages when modprobe nvme write_queues=32 poll_queues=0: root@target:~/nvme# nproc 8 root@target:~/nvme# modprobe nvme write_queues=32 poll_queues=0 [ 17.925326] nvme nvme0: pci function 0000:00:04.0 [ 17.940601] WARNING: CPU: 3 PID: 1030 at kernel/irq/affinity.c:221 irq_create_affinity_masks+0x222/0x330 [ 17.940602] Modules linked in: nvme nvme_core [last unloaded: nvme] [ 17.940605] CPU: 3 PID: 1030 Comm: kworker/u17:4 Tainted: G W 5.1.0+ #156 [ 17.940605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 17.940608] Workqueue: nvme-reset-wq nvme_reset_work [nvme] [ 17.940609] RIP: 0010:irq_create_affinity_masks+0x222/0x330 [ 17.940611] Code: 4c 8d 4c 24 28 4c 8d 44 24 30 e8 c9 fa ff ff 89 44 24 18 e8 c0 38 fa ff 8b 44 24 18 44 8b 54 24 1c 5a 44 01 d0 41 39 c4 76 02 <0f> 0b 48 89 df 44 01 e5 e8 f1 ce 10 00 48 8b 34 24 44 89 f0 44 01 [ 17.940611] RSP: 0018:ffffc90002277c50 EFLAGS: 00010216 [ 17.940612] RAX: 0000000000000008 RBX: ffff88807ca48860 RCX: 0000000000000000 [ 17.940612] RDX: ffff88807bc03800 RSI: 0000000000000020 RDI: 0000000000000000 [ 17.940613] RBP: 0000000000000001 R08: ffffc90002277c78 R09: ffffc90002277c70 [ 17.940613] R10: 0000000000000008 R11: 0000000000000001 R12: 0000000000000020 [ 17.940614] R13: 0000000000025d08 R14: 0000000000000001 R15: ffff88807bc03800 [ 17.940614] FS: 0000000000000000(0000) GS:ffff88807db80000(0000) knlGS:0000000000000000 [ 17.940616] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 17.940617] CR2: 00005635e583f790 CR3: 000000000240a000 CR4: 00000000000006e0 [ 17.940617] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 17.940618] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 17.940618] Call Trace: [ 17.940622] __pci_enable_msix_range+0x215/0x540 [ 17.940623] ? kernfs_put+0x117/0x160 [ 17.940625] pci_alloc_irq_vectors_affinity+0x74/0x110 [ 17.940626] nvme_reset_work+0xc30/0x1397 [nvme] [ 17.940628] ? __switch_to_asm+0x34/0x70 [ 17.940628] ? __switch_to_asm+0x40/0x70 [ 17.940629] ? __switch_to_asm+0x34/0x70 [ 17.940630] ? __switch_to_asm+0x40/0x70 [ 17.940630] ? __switch_to_asm+0x34/0x70 [ 17.940631] ? __switch_to_asm+0x40/0x70 [ 17.940632] ? nvme_irq_check+0x30/0x30 [nvme] [ 17.940633] process_one_work+0x20b/0x3e0 [ 17.940634] worker_thread+0x1f9/0x3d0 [ 17.940635] ? cancel_delayed_work+0xa0/0xa0 [ 17.940636] kthread+0x117/0x120 [ 17.940637] ? kthread_stop+0xf0/0xf0 [ 17.940638] ret_from_fork+0x3a/0x50 [ 17.940639] ---[ end trace aca8a131361cd42a ]--- [ 17.942124] nvme nvme0: 7/1/0 default/read/poll queues Signed-off-by:
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Minwoo Im authored
queue_count_set() seems like that it has been provided to limit the number of queue entries for write/poll queues. But, the queue_count_set() has been doing nothing but a parameter check even it has num_possible_cpus() which is nop. This patch removes entire queue_count_ops from the write_queues and poll_queues. Signed-off-by:
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Minwoo Im authored
poll_queues will be zero even without zero initialization here. Signed-off-by:
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Keith Busch authored
The nvme pci driver prepares its devices for power loss during suspend by shutting down the controllers. The power setting is deferred to pci driver's power management before the platform removes power. The suspend-to-idle mode, however, does not remove power. NVMe devices that implement host managed power settings can achieve lower power and better transition latencies than using generic PCI power settings. Try to use this feature if the platform is not involved with the suspend. If successful, restore the previous power state on resume. Tested-by:
Kai-Heng Feng <kai.heng.feng@canonical.com> Tested-by:
Mario Limonciello <mario.limonciello@dell.com> Reviewed-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
Keith Busch <keith.busch@intel.com> Signed-off-by:
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Minwoo Im authored
This patch introduces a nvme_is_fabrics() inline function to check whether or not the given command structure is for fabrics. Signed-off-by:
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Keith Busch authored
Future use intends to make use of both, so export these functions. And since their implementation is identical except for the opcode, provide a new function that implement both. [akinobu.mita@gmail.com>: fix line over 80 characters] Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Reviewed-by:
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Anton Eidelman authored
When a shared namespace is removed, we call blk_cleanup_queue() when the device can still be accessed as the current path and this can result in submission to a dying queue. Hence, direct_make_request() called by our mpath device may fail (propagating the failure to userspace). Instead, we want to failover this I/O to a different path if one exists. Thus, before we cleanup the request queue, we make sure that the device is cleared from the current path nor it can be selected again as such. Fix this by: - clear the ns from the head->list and synchronize rcu to make sure there is no concurrent path search that restores it as the current path - clear the mpath current path in order to trigger a subsequent path search and sync srcu to wait for any ongoing request submissions - safely continue to namespace removal and blk_cleanup_queue Signed-off-by:
Anton Eidelman <anton@lightbitslabs.com> Signed-off-by:
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James Smart authored
When looking at console messages to troubleshoot, there are one maybe two messages before creation of the controller is complete. However, a lot of io takes place to reach that point. It's unclear when things have started. Add a message when the controller is attempting to create a new association. Thus we know what controller, between what host and remote port, and what NQN is being put into place for any subsequent success or failure messages. Signed-off-by:
James Smart <jsmart2021@gmail.com> Reviewed-by:
Giridhar Malavali <gmalavali@marvell.com> Signed-off-by:
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James Smart authored
To support scenarios which aren't bound to nvmetcli add port scenarios, which is currently where the nvmet_fc transport invokes the discovery event callbacks, a syfs attribute is added to lpfc which can be written to cause an RSCN to be generated for the nport. Signed-off-by:
Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by:
Hannes Reinecke <hare@suse.com> Reviewed-by:
Arun Easi <aeasi@marvell.com> Signed-off-by:
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James Smart authored
This patch updates RSCN receive processing to check for the remote port being an NVME port, and if so, invoke the nvme_fc callback to rescan the remote port. The rescan will generate a discovery udev event. Signed-off-by:
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James Smart authored
This patch adds support for the nvmet discovery op. When the callback routine is called, the driver will call the routine to generate an RSCN to the port on the other end of the link. Signed-off-by:
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James Smart authored
This patch adds general RSCN support: - The ability to transmit an RSCN to the port on the other end of the link (regular port if pt2pt, or fabric controller if fabric). - And general recognition of an RSCN ELS when an ELS is received. Signed-off-by:
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James Smart authored
Update fcloop to support the discovery_event operation and invoke a nvme rescan. In a real fc adapter, this would generate an RSCN, which the host would receive and convert into a nvme rescan on the remote port specified in the rscn payload. Signed-off-by:
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James Smart authored
This patch adds support for the nvmet discovery_change transport op. In turn, the transport adds it's own LLDD api callback discovery_event op to request the LLDD to generate an RSCN for the discovery change. Signed-off-by:
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James Smart authored
Some transports, such as FC-NVME, support discovery controller change events without the use of a persistent discovery controller. FC receives events via RSCN from the FC Fabric Controller or subsystem FC port. This patch adds a nvmet transport op that is called whenever a discovery change event occurs in the nvmet layer. To facilitate the callback without adding another layer to cross into core.c to reference the transport ops, the port structure snapshots the transport ops when the port is enabled and clears them when disabled. Signed-off-by:
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Christoph Hellwig authored
The bfq schedule now uses css_next_descendant_pre directly after the stats functionality depending on it has been from the core blk-cgroup code to bfq. Export the symbol so that bfq can still be build modular. Fixes: d6258980 ("bfq-iosched: move bfq_stat_recursive_sum into the only caller") Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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https://github.com/liu-song-6/linuxJens Axboe authored
Pull MD changes from Song. * 'md-next' of https://github.com/liu-song-6/linux: md: add bitmap_abort label in md_run md-bitmap: create and destroy wb_info_pool with the change of bitmap md-bitmap: create and destroy wb_info_pool with the change of backlog md: introduce mddev_create/destroy_wb_pool for the change of member device md/raid1: fix potential data inconsistency issue with write behind device
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- 20 Jun, 2019 15 commits
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Guoqing Jiang authored
Now, there are two places need to consider about the failure of destroy bitmap, so move the common part between bitmap_abort and abort label. Reviewed-by:
NeilBrown <neilb@suse.com> Signed-off-by:
Guoqing Jiang <gqjiang@suse.com> Signed-off-by:
Song Liu <songliubraving@fb.com>
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Guoqing Jiang authored
The write-behind attribute is part of bitmap, since bitmap can be added/removed dynamically with the following. 1. mdadm --grow /dev/md0 --bitmap=none 2. mdadm --grow /dev/md0 --bitmap=internal --write-behind So we need to destroy wb_info_pool in md_bitmap_destroy, and create the pool before load bitmap. Reviewed-by:
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Guoqing Jiang authored
Since we can enable write-behind mode by write backlog node, so create wb_info_pool if the mode is just enabled, also call call md_bitmap_update_sb to make user aware the write-behind mode is enabled. Conversely, wb_info_pool should be destroyed when write-behind mode is disabled. Beside above, it is better to update bitmap sb if we change the number of max_write_behind. Reviewed-by:
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Guoqing Jiang authored
Previously, we called rdev_init_wb to avoid potential data inconsistency when array is created. Now, we need to call the function and create mempool if a device is added or just be flaged as "writemostly". So mddev_create_wb_pool is introduced and called accordingly. And for safety reason, we mark implicit GFP_NOIO allocation scope for create mempool during mddev_suspend/mddev_resume. And mempool should be removed conversely after remove a member device or its's "writemostly" flag, which is done by call mddev_destroy_wb_pool. Reviewed-by:
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Guoqing Jiang authored
For write-behind mode, we think write IO is complete once it has reached all the non-writemostly devices. It works fine for single queue devices. But for multiqueue device, if there are lots of IOs come from upper layer, then the write-behind device could issue those IOs to different queues, depends on the each queue's delay, so there is no guarantee that those IOs can arrive in order. To address the issue, we need to check the collision among write behind IOs, we can only continue without collision, otherwise wait for the completion of previous collisioned IO. And WBCollision is introduced for multiqueue device which is worked under write-behind mode. But this patch doesn't handle below cases which could have the data inconsistency issue as well, these cases will be handled in later patches. 1. modify max_write_behind by write backlog node. 2. add or remove array's bitmap dynamically. 3. the change of member disk. Reviewed-by:
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Chaitanya Kulkarni authored
Adjust the f2fs tracing code to use newly introduced block layer function blk_op_str() which converts the REQ_OP_XXX into the string XXX. Reviewed-by:
Chao Yu <yuchao0@huawei.com> Signed-off-by:
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Chaitanya Kulkarni authored
Improve the print_req_error with additional request fields which are helpful for debugging. Use newly introduced blk_op_str() to print the REQ_OP_XXX in the string format. Reviewed-by:
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Chaitanya Kulkarni authored
Now that we've a helper function blk_op_str() to convert the REQ_OP_XXX to string XXX, adjust the code to use that. Get rid of the duplicate array op_name which is now present in the blk-core.c which we renamed it to "blk_op_name" and open coding in the blk-mq-debugfs.c. Reviewed-by:
Bart Van Assche <bvanassche@acm.org> Signed-off-by:
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Chaitanya Kulkarni authored
In order to centralize the REQ_OP_XXX to string conversion which can be used in the block layer and different places in the kernel like f2fs, this patch adds a new helper function along with an array similar to the one present in the blk-mq-debugfs.c. We keep this helper functionality centralize under blk-core.c instead of blk-mq-debugfs.c since blk-core.c is configured using CONFIG_BLOCK and it will not be dependent on blk-mq-debugfs.c which is configured using CONFIG_BLK_DEBUG_FS. Next patch adjusts the code in the blk-mq-debugfs.c with newly introduced helper. Reviewed-by:
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Christoph Hellwig authored
Print the calling function instead of print_req_error as a prefix, and print the operation and op_flags separately instead of the whole field. Reviewed-by:
Hannes Reinecke <hare@suse.de> Signed-off-by:
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Christoph Hellwig authored
This option is entirely bfq specific, give it an appropinquate name. Also make it depend on CONFIG_BFQ_GROUP_IOSCHED in Kconfig, as all the functionality already does so anyway. Acked-by:
Tejun Heo <tj@kernel.org> Acked-by:
Paolo Valente <paolo.valente@linaro.org> Signed-off-by:
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Christoph Hellwig authored
This function was moved from core block code and is way to generic. Fold it into the only caller and simplify it based on the actually passed arguments. Acked-by:
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Christoph Hellwig authored
This structure and assorted infrastructure is only used by the bfq I/O scheduler. Move it there instead of bloating the common code. Acked-by:
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Christoph Hellwig authored
When sampling the blkcg counts we don't need atomics or per-cpu variables. Introduce a new structure just containing plain u64 counters. Acked-by:
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Christoph Hellwig authored
Returning a structure generates rather bad code, so switch to passing by reference. Also don't require the structure to be zeroed and add to the 0-initialized counters, but actually set the counters to the calculated value. Acked-by:
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