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/linux/Documentation/admin-guide/device-mapper/
A Ddm-ebs.rst7 a smaller logical block size on a device with a larger logical block
11 Supported emulated logical block sizes 512, 1024, 2048 and 4096.
29 Number of sectors defining the logical block size to be emulated;
35 Number of sectors defining the logical block size of <dev path>.
37 If not provided, the logical block size of <dev path> will be used.
42 Emulate 1 sector = 512 bytes logical block size on /dev/sda starting at
47 Emulate 2 sector = 1KiB logical block size on /dev/sda starting at
49 This presumes 2KiB logical blocksize on /dev/sda or less to work:
A Dvdo.rst56 <offset> <logical device size> vdo V4 <storage device>
64 The offset, in sectors, at which the vdo volume's logical
67 logical device size:
69 in sectors. Must match the current logical size of the vdo
88 If the logical thread count is non-zero, the cache size
89 must be at least 4096 blocks per logical thread.
139 logical:
141 based on the logical address of incoming bios. The default
201 Grow the logical size to 4 GB.
326 - 1.6 MB of RAM for each 1 TB of logical space.
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A Dvdo-design.rst9 can be backed by up to 256TB of storage, and can present a logical size of
30 maps from logical block addresses to the actual storage location of the
290 makes growing the logical size of a vdo relatively easy.
293 the entire leaf level of the trees in memory, so each logical zone
317 reconstruct the logical to physical mappings after an unexpected
346 2. The data_vio places a claim (the "logical lock") on the logical address
350 the logical address and the value is a pointer to the data_vio
396 logical zone lock.
564 acquires the implicit logical zone lock and updates the
577 the logical block lock acquired in step 2.
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/linux/Documentation/usb/
A Dmass-storage.rst10 multiple logical units (LUNs). Backing storage for each LUN is
41 backing storage for each logical unit. There may be at most
51 The size of the logical unit will be rounded down to a full
52 logical block. The logical block size is 2048 bytes for LUNs
81 Note that “removable” means the logical unit's media can be
103 logical units simulating CD-ROM it is forced to true.
108 Write10 and Write12 commands sent to given logical units.
165 logical unit is removable), the content is empty.
177 open for given logical unit.
231 values for each logical unit. If one uses only a single logical
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/linux/fs/btrfs/
A Draid-stripe-tree.c129 trace_btrfs_insert_one_raid_extent(fs_info, bioc->logical, bioc->size, in btrfs_insert_one_raid_extent()
144 stripe_key.objectid = bioc->logical; in btrfs_insert_one_raid_extent()
187 u64 logical, u64 *length, u64 map_type, in btrfs_get_raid_extent_offset() argument
196 const u64 end = logical + *length; in btrfs_get_raid_extent_offset()
205 stripe_key.objectid = logical; in btrfs_get_raid_extent_offset()
240 if (in_range(logical, found_logical, found_length)) in btrfs_get_raid_extent_offset()
248 offset = logical - found_logical; in btrfs_get_raid_extent_offset()
274 trace_btrfs_get_raid_extent_offset(fs_info, logical, *length, in btrfs_get_raid_extent_offset()
289 logical, logical + *length, stripe->dev->devid, in btrfs_get_raid_extent_offset()
A Dtree-mod-log.c11 u64 logical; member
17 u64 logical; member
150 if (cur->logical < tm->logical) in tree_mod_log_insert()
152 else if (cur->logical > tm->logical) in tree_mod_log_insert()
211 tm->logical = eb->start; in alloc_tree_mod_elem()
271 tm->logical = eb->start; in tree_mod_log_alloc_move()
897 if (tm->logical != first_tm->logical) in tree_mod_log_rewind()
981 u64 logical; in btrfs_get_old_root() local
992 logical = old_root->logical; in btrfs_get_old_root()
995 logical = eb_root->start; in btrfs_get_old_root()
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A Dscrub.c116 u64 logical; member
227 u64 logical; member
502 swarn.logical = logical; in scrub_print_common_warning()
602 const u64 logical = stripe->logical + (sector_nr << fs_info->sectorsize_bits); in scrub_verify_one_metadata() local
722 stripe->logical + in scrub_verify_one_sector()
724 stripe->logical); in scrub_verify_one_sector()
1159 stripe->logical; in scrub_submit_write_bio()
1693 const u64 logical = stripe->logical + in scrub_submit_extent_sector_read() local
1792 stripe->logical, in stripe_has_metadata_error()
2252 u64 logical; in scrub_stripe() local
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A Dvolumes.h489 u64 logical; member
681 u64 logical, u64 *length,
685 struct btrfs_io_stripe *smap, u64 logical,
688 u64 logical, u64 *length_ret,
718 int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
745 u64 logical, u64 len);
747 u64 logical);
760 u64 logical, u64 length);
762 u64 logical, u64 length);
764 u64 logical, u64 length);
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A Dzoned.h81 int btrfs_sync_zone_write_pointer(struct btrfs_device *tgt_dev, u64 logical,
86 void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical,
93 void btrfs_zoned_release_data_reloc_bg(struct btrfs_fs_info *fs_info, u64 logical,
213 u64 logical, u64 physical_start, in btrfs_sync_zone_write_pointer() argument
236 u64 logical, u64 length) { } in btrfs_zone_finish_endio() argument
251 u64 logical, u64 length) { } in btrfs_zoned_release_data_reloc_bg() argument
A Dzoned.c1547 u64 logical = cache->start; in btrfs_load_block_group_zone_info() local
1775 u64 logical) in btrfs_rewrite_logical_zoned() argument
1780 ordered->disk_bytenr = logical; in btrfs_rewrite_logical_zoned()
1787 em->disk_bytenr = logical; in btrfs_rewrite_logical_zoned()
1793 u64 logical, u64 len) in btrfs_zoned_split_ordered() argument
1805 new->disk_bytenr = logical; in btrfs_zoned_split_ordered()
1815 u64 logical, len; in btrfs_finish_ordered_zoned() local
1827 logical = sum->logical; in btrfs_finish_ordered_zoned()
1832 if (sum->logical == logical + len) { in btrfs_finish_ordered_zoned()
1841 logical = sum->logical; in btrfs_finish_ordered_zoned()
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A Dtree-checker.c803 logical, &vaf); in chunk_err()
808 logical, &vaf); in chunk_err()
844 chunk_err(leaf, chunk, logical, in btrfs_check_chunk_valid()
849 chunk_err(leaf, chunk, logical, in btrfs_check_chunk_valid()
855 chunk_err(leaf, chunk, logical, in btrfs_check_chunk_valid()
861 chunk_err(leaf, chunk, logical, in btrfs_check_chunk_valid()
867 chunk_err(leaf, chunk, logical, in btrfs_check_chunk_valid()
874 chunk_err(leaf, chunk, logical, in btrfs_check_chunk_valid()
879 chunk_err(leaf, chunk, logical, in btrfs_check_chunk_valid()
881 logical, length); in btrfs_check_chunk_valid()
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A Dvolumes.c3109 if (end < logical) in btrfs_find_chunk_map_nolock()
3152 logical, length); in btrfs_get_chunk_map()
3159 logical, logical + length, map->start, in btrfs_get_chunk_map()
5827 u64 logical) in btrfs_full_stripe_len() argument
5944 bioc->logical = logical; in alloc_btrfs_io_context()
6123 u64 logical, in handle_ops_on_dev_replace() argument
6382 logical; in map_blocks_raid56_write()
6881 u64 logical; in read_one_chunk() local
6891 logical = key->offset; in read_one_chunk()
6928 map->start = logical; in read_one_chunk()
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/linux/Documentation/ABI/testing/
A Dsysfs-bus-pci-devices-cciss5 Description: Displays the SCSI INQUIRY page 0 model for logical drive
12 Description: Displays the SCSI INQUIRY page 0 revision for logical
19 Description: Displays the SCSI INQUIRY page 83 serial number for logical
26 Description: Displays the SCSI INQUIRY page 0 vendor for logical drive
39 Description: Kicks of a rescan of the controller to discover logical
46 Description: Displays the 8-byte LUN ID used to address logical
53 Description: Displays the RAID level of logical drive Y of
60 Description: Displays the usage count (number of opens) of logical drive Y
/linux/Documentation/userspace-api/media/cec/
A Dcec-ioc-adap-g-log-addrs.rst40 To query the current CEC logical addresses, applications call
44 To set new logical addresses, applications fill in
58 then this ioctl will block until all requested logical
63 logical addresses are claimed or cleared.
82 driver. If no logical address could be claimed, then it is set to
101 - Number of logical addresses to set up. Must be ≤
107 logical addresses, although some hardware has support for more.
109 number of logical addresses it could claim, which may be less than
111 adapter shall clear all claimed logical addresses and all other
128 - Primary device type for each logical address. See
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/linux/Documentation/i2c/
A Di2c-sysfs.rst12 kernel abstracts the MUX channels into logical I2C bus numbers. However, there
14 to logical I2C bus number. This doc is aimed to fill in this gap, so the
16 the concept of logical I2C buses in the kernel, by knowing the physical I2C
80 Every I2C bus number you see in Linux I2C Sysfs is a logical I2C bus with a
143 in logical I2C bus directory which is fanned out from another I2C bus.
145 this logical I2C bus.
174 ``i2c-73`` is a logical bus fanout by an I2C MUX under ``i2c-7``
216 with a logical I2C bus number of 73.
232 we can now find the 0x72 MUX and what logical I2C bus numbers
301 logical bus number of the channel 7 of the MUX on bus 3.
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/linux/drivers/md/dm-vdo/
A Ddump.c163 wait_on, data_vio, data_vio->allocation.pbn, data_vio->logical.lbn, in dump_vio_waiters()
169 data_vio, data_vio->allocation.pbn, data_vio->logical.lbn, in dump_vio_waiters()
239 data_vio->allocation.pbn, data_vio->logical.lbn, in dump_data_vio()
244 data_vio->allocation.pbn, data_vio->logical.lbn); in dump_data_vio()
248 data_vio->logical.lbn); in dump_data_vio()
272 dump_vio_waiters(&data_vio->logical.waiters, "lbn"); in dump_data_vio()
A Ddata-vio.h181 struct lbn_lock logical; member
379 (unsigned long long) data_vio->logical.lbn, thread_id, expected); in assert_data_vio_in_hash_zone()
402 thread_id_t expected = data_vio->logical.zone->thread_id; in assert_data_vio_in_logical_zone()
407 (unsigned long long) data_vio->logical.lbn, thread_id, expected); in assert_data_vio_in_logical_zone()
414 data_vio->logical.zone->thread_id); in set_data_vio_logical_callback()
530 (unsigned long long) data_vio->logical.lbn, thread_id, in assert_data_vio_in_journal_zone()
560 (unsigned long long) data_vio->logical.lbn, thread_id, in assert_data_vio_in_packer_zone()
590 (unsigned long long) data_vio->logical.lbn, thread_id, in assert_data_vio_on_cpu_thread()
/linux/Documentation/admin-guide/hw-vuln/
A Dspecial-register-buffer-data-sampling.rst66 staging buffer before the secret data can be accessed by another logical
70 accesses from other logical processors will be delayed until the special
78 #. Executing RDRAND at the same time on multiple logical processors will be
83 logical processors that miss their core caches, with an impact similar to
88 Software Guard Extensions (Intel SGX) enclaves. On logical processors that
90 take longer to execute and do not impact performance of sibling logical
102 Setting IA32_MCU_OPT_CTRL[0] (RNGDS_MITG_DIS) to 1 for a logical processor
104 enclave on that logical processor. Opting out of the mitigation for a
105 particular logical processor does not affect the RDRAND and RDSEED mitigations
106 for other logical processors.
/linux/Documentation/ABI/stable/
A Dsysfs-class-ubi38 Amount of available logical eraseblock. For example, one may
39 create a new UBI volume which has this amount of logical
70 Maximum logical eraseblock size this UBI device may provide. UBI
71 volumes may have smaller logical eraseblock size because of their
148 Volume alignment - the value the logical eraseblock size of
150 logical eraseblock size is multiple of 2048. In other words,
151 volume logical eraseblock size is UBI device logical eraseblock
192 Equivalent to the volume size in logical eraseblocks.
219 Logical eraseblock size of this volume. Equivalent to logical
/linux/Documentation/gpu/rfc/
A Di915_scheduler.rst104 * Export engines logical mapping
109 Export engines logical mapping
111 Certain use cases require BBs to be placed on engine instances in logical order
112 (e.g. split-frame on gen11+). The logical mapping of engine instances can change
114 logical mapping with the existing query engine info IOCTL. Also the GuC
116 engines in logical order which is a new requirement compared to execlists.
117 Lastly, all current platforms have at most 2 engine instances and the logical
122 logical instance has been returned and a new field,
123 drm_i915_engine_info.logical_instance, returns the logical instance.
/linux/Documentation/userspace-api/
A Disapnp.rst13 This directory allows access to ISA PnP cards and logical devices.
15 a logical device.
/linux/Documentation/filesystems/ext4/
A Dabout.rst25 ext4 divides a storage device into an array of logical blocks both to
31 logical blocks, not raw LBAs, and not 1024-byte blocks. For the sake of
32 convenience, the logical block size will be referred to as
/linux/Documentation/userspace-api/media/mediactl/
A Dmedia-controller-model.rst15 It can correspond to a large variety of logical blocks such as
16 physical hardware devices (CMOS sensor for instance), logical
38 entities form a single logical unit. For example this could represent the
/linux/Documentation/driver-api/pm/
A Dcpuidle.rst16 Every time one of the logical CPUs in the system (the entities that appear to
21 belongs to. That can be done by making the idle logical CPU stop fetching
44 one of the logical CPUs in the system turns out to be idle. Its role is to
81 (logical) CPU represented by the struct cpuidle_device object pointed
99 Called to make the governor stop handling the (logical) CPU represented
113 Called to select an idle state for the processor holding the (logical)
168 the logical CPUs handled by the given driver.
211 representing the logical CPU running this callback and the
230 asked for if only one logical CPU is idle).
233 subset of logical CPUs in the system, the :c:member:`cpumask` field in its
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/linux/Documentation/driver-api/media/
A Dcec-core.rst18 other through the HDMI connection. The protocol uses logical addresses in the
19 communication. The logical address is strictly connected with the functionality
66 the number of simultaneous logical addresses that this
136 means powering it up in a state where no logical addresses are claimed. The
171 To program a new logical address::
176 are to be erased. Otherwise the given logical address should be programmed.
177 If the maximum number of available logical addresses is exceeded, then it
178 should return -ENXIO. Once a logical address is programmed the CEC hardware
409 The adapter is fully configured, i.e. all logical addresses have been
466 claimed, otherwise just queue it and return. To unconfigure all logical
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