| /linux-6.6.21/Documentation/block/ |
| D | stat.rst | 29 read I/Os requests number of read I/Os processed
30 read merges requests number of read I/Os merged with in-queue I/O
32 read ticks milliseconds total wait time for read requests
33 write I/Os requests number of write I/Os processed
34 write merges requests number of write I/Os merged with in-queue I/O
36 write ticks milliseconds total wait time for write requests
37 in_flight requests number of I/Os currently in flight
39 time_in_queue milliseconds total wait time for all requests
40 discard I/Os requests number of discard I/Os processed
41 discard merges requests number of discard I/Os merged with in-queue I/O
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| D | blk-mq.rst | 9 through queueing and submitting IO requests to block devices simultaneously,
23 involves ordering read/write requests according to the current position of the
32 The former design had a single queue to store block IO requests with a single
45 for instance), blk-mq takes action: it will store and manage IO requests to
53 layer or if we want to try to merge requests. In both cases, requests will be
56 Then, after the requests are processed by software queues, they will be placed
58 to process those requests. However, if the hardware does not have enough
59 resources to accept more requests, blk-mq will places requests on a temporary
65 The block IO subsystem adds requests in the software staging queues
73 The staging queue can be used to merge requests for adjacent sectors. For
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| D | writeback_cache_control.rst | 17 a forced cache flush, and the Force Unit Access (FUA) flag for requests.
26 guarantees that previously completed write requests are on non-volatile
58 on non-empty bios can simply be ignored, and REQ_PREFLUSH requests without
68 support required, the block layer completes empty REQ_PREFLUSH requests before
70 requests that have a payload. For devices with volatile write caches the
76 and handle empty REQ_OP_FLUSH requests in its prep_fn/request_fn. Note that
77 REQ_PREFLUSH requests with a payload are automatically turned into a sequence
84 and the driver must handle write requests that have the REQ_FUA bit set
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| /linux-6.6.21/Documentation/devicetree/bindings/dma/ |
| D | lpc1850-dmamux.txt | 11 - dma-requests: Number of DMA requests for the mux
15 - dma-requests: Number of DMA requests the controller can handle
28 dma-requests = <16>;
40 dma-requests = <64>;
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| D | fsl-imx-dma.txt | 18 - dma-requests : Number of DMA requests supported.
19 - #dma-requests : deprecated
34 Clients have to specify the DMA requests with phandles in a list.
40 - dma-names: List of string identifiers for the DMA requests. For the correct
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| D | ti-dma-crossbar.txt | 9 - dma-requests: Number of DMA requests the crossbar can receive
13 - dma-requests: Number of DMA requests the controller can handle
43 dma-requests = <127>;
51 dma-requests = <205>;
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| D | renesas,rzn1-dmamux.yaml | 34 dma-requests:
39 - dma-requests
50 dma-requests = <32>;
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| D | dma-router.yaml | 18 have more peripherals integrated with DMA requests than what the DMA
33 dma-requests:
49 dma-requests = <205>;
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| D | owl-dma.yaml | 42 dma-requests:
59 - dma-requests
76 dma-requests = <46>;
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| /linux-6.6.21/Documentation/virt/acrn/ |
| D | io-request.rst | 14 For each User VM, there is a shared 4-KByte memory region used for I/O requests
26 An I/O client is responsible for handling User VM I/O requests whose accessed
29 default client, that handles all I/O requests that do not fit into the range of
33 Below illustration shows the relationship between I/O requests shared buffer,
34 I/O requests and I/O clients.
84 4. Processing flow of I/O requests
91 c. The upcall handler schedules a worker to dispatch I/O requests.
92 d. The worker looks for the PENDING I/O requests, assigns them to different
95 e. The notified client handles the assigned I/O requests.
96 f. The HSM updates I/O requests states to COMPLETE and notifies the hypervisor
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| /linux-6.6.21/drivers/gpu/drm/i915/gt/uc/ |
| D | intel_guc_ct.c | 117 spin_lock_init(&ct->requests.lock); in intel_guc_ct_init_early()
118 INIT_LIST_HEAD(&ct->requests.pending); in intel_guc_ct_init_early()
119 INIT_LIST_HEAD(&ct->requests.incoming); in intel_guc_ct_init_early()
123 INIT_WORK(&ct->requests.worker, ct_incoming_request_worker_func); in intel_guc_ct_init_early()
382 unsigned int lost = fence % ARRAY_SIZE(ct->requests.lost_and_found); in ct_track_lost_and_found()
390 ct->requests.lost_and_found[lost].stack = stack_depot_save(entries, n, GFP_NOWAIT); in ct_track_lost_and_found()
392 ct->requests.lost_and_found[lost].fence = fence; in ct_track_lost_and_found()
393 ct->requests.lost_and_found[lost].action = action; in ct_track_lost_and_found()
400 return ++ct->requests.last_fence; in ct_get_next_fence()
740 spin_lock(&ct->requests.lock); in ct_send()
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| /linux-6.6.21/drivers/gpu/drm/i915/gt/ |
| D | intel_gt_requests.c | 21 list_for_each_entry_safe(rq, rn, &tl->requests, link) in retire_requests()
31 return !list_empty(&engine->kernel_context->timeline->requests); in engine_active()
208 container_of(work, typeof(*gt), requests.retire_work.work); in retire_work_handler()
210 queue_delayed_work(gt->i915->unordered_wq, >->requests.retire_work, in retire_work_handler()
217 INIT_DELAYED_WORK(>->requests.retire_work, retire_work_handler); in intel_gt_init_requests()
222 cancel_delayed_work(>->requests.retire_work); in intel_gt_park_requests()
227 queue_delayed_work(gt->i915->unordered_wq, >->requests.retire_work, in intel_gt_unpark_requests()
234 cancel_delayed_work_sync(>->requests.retire_work); in intel_gt_fini_requests()
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| /linux-6.6.21/Documentation/virt/kvm/ |
| D | vcpu-requests.rst | 14 /* Check if any requests are pending for VCPU @vcpu. */
40 as possible after making the request. This means most requests
69 ensure VCPU requests are seen by VCPUs (see "Ensuring Requests Are Seen"),
90 certain VCPU requests, namely KVM_REQ_TLB_FLUSH, to wait until the VCPU
96 VCPU requests are simply bit indices of the ``vcpu->requests`` bitmap.
100 clear_bit(KVM_REQ_UNBLOCK & KVM_REQUEST_MASK, &vcpu->requests);
104 independent requests; all additional bits are available for architecture
105 dependent requests.
142 VCPU requests should be masked by KVM_REQUEST_MASK before using them with
152 This flag is applied to requests that only need immediate attention
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| /linux-6.6.21/Documentation/filesystems/ |
| D | virtiofs.rst | 58 Since the virtio-fs device uses the FUSE protocol for file system requests, the
64 FUSE requests are placed into a virtqueue and processed by the host. The
71 prioritize certain requests over others. Virtqueues have queue semantics and
72 it is not possible to change the order of requests that have been enqueued.
74 impossible to add high priority requests. In order to address this difference,
75 the virtio-fs device uses a "hiprio" virtqueue specifically for requests that
76 have priority over normal requests.
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| D | gfs2-glocks.rst | 19 The gl_holders list contains all the queued lock requests (not
77 grant for which we ignore remote demote requests. This is in order to
163 1. DLM lock time (non-blocking requests)
164 2. DLM lock time (blocking requests)
169 currently means any requests when (a) the current state of
173 lock requests.
176 how many lock requests have been made, and thus how much data
180 of dlm lock requests issued.
198 the average time between lock requests for a glock means we
225 srtt Smoothed round trip time for non blocking dlm requests
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| /linux-6.6.21/arch/powerpc/kvm/ |
| D | trace.h | 106 __field( __u32, requests )
111 __entry->requests = vcpu->requests;
115 __entry->cpu_nr, __entry->requests)
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| /linux-6.6.21/Documentation/ABI/stable/ |
| D | sysfs-bus-xen-backend | 39 Number of flush requests from the frontend.
46 Number of requests delayed because the backend was too
47 busy processing previous requests.
54 Number of read requests from the frontend.
68 Number of write requests from the frontend.
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| /linux-6.6.21/Documentation/ABI/testing/ |
| D | sysfs-class-scsi_tape | 33 The number of I/O requests issued to the tape drive other
34 than SCSI read/write requests.
54 Shows the total number of read requests issued to the tape
65 read I/O requests to complete.
85 Shows the total number of write requests issued to the tape
96 write I/O requests to complete.
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| /linux-6.6.21/Documentation/admin-guide/device-mapper/ |
| D | log-writes.rst | 10 that is in the WRITE requests is copied into the log to make the replay happen
17 cache. This means that normal WRITE requests are not actually logged until the
22 This works by attaching all WRITE requests to a list once the write completes.
39 Any REQ_FUA requests bypass this flushing mechanism and are logged as soon as
40 they complete as those requests will obviously bypass the device cache.
42 Any REQ_OP_DISCARD requests are treated like WRITE requests. Otherwise we would
43 have all the DISCARD requests, and then the WRITE requests and then the FLUSH
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| /linux-6.6.21/Documentation/scsi/ |
| D | hptiop.rst | 110 All queued requests are handled via inbound/outbound queue port.
125 - Post the packet to IOP by writing it to inbound queue. For requests
127 requests allocated in host memory, write (0x80000000|(bus_addr>>5))
134 For requests allocated in IOP memory, the request offset is posted to
137 For requests allocated in host memory, (0x80000000|(bus_addr>>5))
144 For requests allocated in IOP memory, the host driver free the request
147 Non-queued requests (reset/flush etc) can be sent via inbound message
155 All queued requests are handled via inbound/outbound list.
169 round to 0 if the index reaches the supported count of requests.
186 Non-queued requests (reset communication/reset/flush etc) can be sent via PCIe
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| /linux-6.6.21/Documentation/mm/ |
| D | balance.rst | 14 allocation requests that have order-0 fallback options. In such cases,
17 __GFP_IO allocation requests are made to prevent file system deadlocks.
19 In the absence of non sleepable allocation requests, it seems detrimental
24 That being said, the kernel should try to fulfill requests for direct
26 the dma pool, so as to keep the dma pool filled for dma requests (atomic
29 regular memory requests by allocating one from the dma pool, instead
74 probably because all allocation requests are coming from intr context
88 watermark[WMARK_HIGH]. When low_on_memory is set, page allocation requests will
97 1. Dynamic experience should influence balancing: number of failed requests
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| /linux-6.6.21/Documentation/driver-api/firmware/ |
| D | request_firmware.rst | 12 Synchronous firmware requests
15 Synchronous firmware requests will wait until the firmware is found or until
43 Asynchronous firmware requests
46 Asynchronous firmware requests allow driver code to not have to wait
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| /linux-6.6.21/Documentation/hid/ |
| D | hid-transport.rst | 105 - Control Channel (ctrl): The ctrl channel is used for synchronous requests and
108 events or answers to host requests on this channel.
112 SET_REPORT requests.
120 requiring explicit requests. Devices can choose to send data continuously or
123 to device and may include LED requests, rumble requests or more. Output
131 Feature reports are never sent without requests. A host must explicitly set
142 channel provides synchronous GET/SET_REPORT requests. Plain reports are only
150 simultaneous GET_REPORT requests.
159 GET_REPORT requests can be sent for any of the 3 report types and shall
173 multiple synchronous SET_REPORT requests.
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| /linux-6.6.21/drivers/media/v4l2-core/ |
| D | v4l2-ctrls-request.c | 21 INIT_LIST_HEAD(&hdl->requests); in v4l2_ctrl_handler_init_request()
39 if (hdl->req_obj.ops || list_empty(&hdl->requests)) in v4l2_ctrl_handler_free_request()
47 list_for_each_entry_safe(req, next_req, &hdl->requests, requests) { in v4l2_ctrl_handler_free_request()
102 list_del_init(&hdl->requests); in v4l2_ctrl_request_unbind()
163 list_add_tail(&hdl->requests, &from->requests); in v4l2_ctrl_request_bind()
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| /linux-6.6.21/net/handshake/ |
| D | netlink.c | 199 LIST_HEAD(requests); in handshake_net_exit()
208 list_splice_init(&requests, &hn->hn_requests); in handshake_net_exit()
211 while (!list_empty(&requests)) { in handshake_net_exit()
212 req = list_first_entry(&requests, struct handshake_req, hr_list); in handshake_net_exit()
|