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体验新版 GitCode,发现更多精彩内容 >>
提交
0694f8c3
编写于
7月 29, 2018
作者:
T
Theodore Ts'o
浏览文件
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电子邮件补丁
差异文件
docs: fix up the obviously obsolete bits in the new ext4 documentation
Signed-off-by:
N
Theodore Ts'o
<
tytso@mit.edu
>
上级
f5cb282d
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
9 addition
and
40 deletion
+9
-40
Documentation/filesystems/ext4/ext4.rst
Documentation/filesystems/ext4/ext4.rst
+8
-39
Documentation/index.rst
Documentation/index.rst
+1
-1
未找到文件。
Documentation/filesystems/ext4/ext4.rst
浏览文件 @
0694f8c3
...
...
@@ -20,43 +20,32 @@ Note: More extensive information for getting started with ext4 can be
found
at
the
ext4
wiki
site
at
the
URL
:
http
://
ext4
.
wiki
.
kernel
.
org
/
index
.
php
/
Ext4_Howto
-
Compile
and
install
the
latest
version
of
e2fsprogs
(
as
of
this
writing
version
1.41.3
)
from
:
-
The
latest
version
of
e2fsprogs
can
be
found
at
:
http
://
sourceforge
.
net
/
project
/
showfiles
.
php
?
group_id
=
2406
http
s
://
www
.
kernel
.
org
/
pub
/
linux
/
kernel
/
people
/
tytso
/
e2fsprogs
/
or
http
s
://
www
.
kernel
.
org
/
pub
/
linux
/
kernel
/
people
/
tytso
/
e2fsprogs
/
http
://
sourceforge
.
net
/
project
/
showfiles
.
php
?
group_id
=
2406
or
grab
the
latest
git
repository
from
:
git
://
git
.
kernel
.
org
/
pub
/
scm
/
fs
/
ext2
/
e2fsprogs
.
git
-
Note
that
it
is
highly
important
to
install
the
mke2fs
.
conf
file
that
comes
with
the
e2fsprogs
1.41
.
x
sources
in
/
etc
/
mke2fs
.
conf
.
If
you
have
edited
the
/
etc
/
mke2fs
.
conf
file
installed
on
your
system
,
you
will
need
to
merge
your
changes
with
the
version
from
e2fsprogs
1.41
.
x
.
https
://
git
.
kernel
.
org
/
pub
/
scm
/
fs
/
ext2
/
e2fsprogs
.
git
-
Create
a
new
filesystem
using
the
ext4
filesystem
type
:
::
-
Create
a
new
filesystem
using
the
ext4
filesystem
type
:
#
mke2fs
-
t
ext4
/
dev
/
hda1
Or
to
configure
an
existing
ext3
filesystem
to
support
extents
:
::
Or
to
configure
an
existing
ext3
filesystem
to
support
extents
:
#
tune2fs
-
O
extents
/
dev
/
hda1
If
the
filesystem
was
created
with
128
byte
inodes
,
it
can
be
converted
to
use
256
byte
for
greater
efficiency
via
:
::
converted
to
use
256
byte
for
greater
efficiency
via
:
#
tune2fs
-
I
256
/
dev
/
hda1
(
Note
:
we
currently
do
not
have
tools
to
convert
an
ext4
filesystem
back
to
ext3
;
so
please
do
not
do
try
this
on
production
filesystems
.)
-
Mounting
:::
-
Mounting
:
#
mount
-
t
ext4
/
dev
/
hda1
/
wherever
...
...
@@ -106,26 +95,6 @@ Currently Available
[1] Filesystems with a block size of 1k may see a limit imposed by the
directory hash tree having a maximum depth of two.
Candidate Features for Future Inclusion
---------------------------------------
* online defrag (patches available but not well tested)
* reduced mke2fs time via lazy itable initialization in conjunction with
the uninit_bg feature (capability to do this is available in e2fsprogs
but a kernel thread to do lazy zeroing of unused inode table blocks
after filesystem is first mounted is required for safety)
There are several others under discussion, whether they all make it in is
partly a function of how much time everyone has to work on them. Features like
metadata checksumming have been discussed and planned for a bit but no patches
exist yet so I'
m
not
sure
they
're in the near-term roadmap.
The big performance win will come with mballoc, delalloc and flex_bg
grouping of bitmaps and inode tables. Some test results available here:
- http://www.bullopensource.org/ext4/20080818-ffsb/ffsb-write-2.6.27-rc1.html
- http://www.bullopensource.org/ext4/20080818-ffsb/ffsb-readwrite-2.6.27-rc1.html
Options
=======
...
...
Documentation/index.rst
浏览文件 @
0694f8c3
...
...
@@ -109,7 +109,7 @@ The documentation in this section are provided by specific filesystem
subprojects.
.. toctree::
:maxdepth:
4
:maxdepth:
2
filesystems/ext4/index
...
...
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