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btrfs-progs: docs: update system limits texts in sect. 5

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Signed-off-by: David Sterba <dsterba@suse.com>
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David Sterba 2019-01-15 17:21:01 +01:00
parent 428bb2e9c2
commit 5121b09519
1 changed files with 9 additions and 6 deletions
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15
Documentation/btrfs-man5.asciidoc
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@ -641,10 +641,11 @@ maximum file name length::
maximum symlink target length:: maximum symlink target length::
depends on the 'nodesize' value, for 4k it's 3949 bytes, for larger nodesize depends on the 'nodesize' value, for 4k it's 3949 bytes, for larger nodesize
it's 4095 it's 4095 due to the system limit PATH_MAX
+ +
The symlink target may not be a valid path, ie the path name components The symlink target may not be a valid path, ie. the path name components
can exceed the limits, there's no content validation at `symlink`(3) creation. can exceed the limits (NAME_MAX), there's no content validation at `symlink`(3)
creation.
maximum number of inodes:: maximum number of inodes::
2^64^ but depends on the available metadata space as the inodes are created 2^64^ but depends on the available metadata space as the inodes are created
@ -657,9 +658,9 @@ maximum file length::
inherent limit of btrfs is 2^64^ (16 EiB) but the linux VFS limit is 2^63^ (8 EiB) inherent limit of btrfs is 2^64^ (16 EiB) but the linux VFS limit is 2^63^ (8 EiB)
maximum number of subvolumes:: maximum number of subvolumes::
2^64^ but depends on the available metadata space, the space consumed by all the subvolume ids can go up to 2^64^ but the number of actual subvolumes
subvolume metadata includes bookkeeping of the shared extents can be large (MiB, depends on the available metadata space, the space consumed by all subvolume
GiB) metadata includes bookkeeping of shared extents can be large (MiB, GiB)
maximum number of hardlinks of a file in a directory:: maximum number of hardlinks of a file in a directory::
65536 when the `extref` feature is turned on during mkfs (default), roughly 65536 when the `extref` feature is turned on during mkfs (default), roughly
@ -727,6 +728,7 @@ When set on a directory, all newly created files will inherit this attribute.
No other attributes are supported. For the complete list please refer to the No other attributes are supported. For the complete list please refer to the
`chattr`(1) manual page. `chattr`(1) manual page.
CONTROL DEVICE CONTROL DEVICE
-------------- --------------
@ -758,6 +760,7 @@ The control device is not strictly required but the device scanning will not
work and a workaround would need to be used to mount a multi-device filesystem. work and a workaround would need to be used to mount a multi-device filesystem.
The mount option 'device' can trigger the device scanning during mount. The mount option 'device' can trigger the device scanning during mount.
SEE ALSO SEE ALSO
-------- --------
`acl`(5), `acl`(5),