Hi all,
Thank you very much for all your reviewing, I will pull your comments in
and send a RFC sooner.
// Robert
On 02/26/2013 05:24 PM, Robert Yang wrote:
===Contents===
* Summary
* Brief design
* Test info
* The rootfs generation time changes
* The rootfs size changes
* Summary:
The ext3 and ext4 rootfs generation relied on genext2fs and flipping
some bits to "convert" the ext2 filesystem to ext3 and ext4 in the past,
now we use the mkfs.ext3/ext4 to create the image, and use mkdebugfs.sh
to copy the files to the image.
* Brief design:
- Upgrade the e2fsprogs to the update to date version (the git
repo) which contains the "symlink" command in debugfs shell that we
need.
- Replace the current genext2fs command with mkdebugfs.sh in
image_types.bbclass.
- The new steps to generate the root filesystem are:
-> use "dd" command to make rootfs.ext* file
-> run "mkfs.ext* rootfs.ext*" to create the filesystem
-> run the mkdebugfs.sh to generate the root filesystem
* Test info: (MACHINE = qemuarm, IMAGE_FSTYPES = "ext2 ext3 ext4 tar.bz2")
$ bitbake core-image-minimal core-image-sato meta-toolchain-sdk
core-image-sato-sdk
$ runqemu runqemu qemuarm core-image-sato ext3
$ runqemu runqemu qemuarm core-image-minimal ext3
All of them are OK
* The rootfs generation time changes
- For a core-image-minimal generation (IMAGE_FSTYPES="tar.bz2 ext3"):
Before:
$ time bitbake core-image-minimal
real 1m10.823s
user 0m37.108s
sys 0m15.894s
After:
$ time bitbake core-image-minimal
real 1m17.501s
user 0m29.304s
sys 0m20.731s
# 7 seconds lost.
- For a core-image-sato generation (IMAGE_FSTYPES="tar.bz2 ext3"):
Before:
$ time bitbake core-image-sato
real 11m10.645s
user 2m43.503s
sys 1m1.589s
After:
$ time bitbake core-image-sato
real 11m53.131s
user 3m18.988s
sys 2m8.350s
# 43 seconds lost.
* The rootfs size changes
- The image size are the same by "ls -h", but different by "du -sh":
(core-image-sato)
$ ls -lh BEFORE.rootfs.ext3 AFTER.rootfs.ext3 | awk '{print $5"\t"$NF}'
357M BEFORE.rootfs.ext3
357M AFTER.rootfs.ext3
$ du -sh BEFORE.rootfs.ext3 AFTER.rootfs.ext3
238M BEFORE.rootfs.ext3
357M AFTER.rootfs.ext3
It seems that the genext2fs has optimized the rootfs generation.
// Robert
The following changes since commit 2cc4fe4a0874c42421b1bf3fa100160a9e60a9da:
upstream_tracking.inc: Coonectivity and multimedia packages updates
(2013-02-25 05:58:20 -0800)
are available in the git repository at:
git://git.pokylinux.org/poky-contrib robert/e2fsprogs
http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=robert/e2fsprogs
Robert Yang (7):
e2fsprogs: upgrade to the git version (rename only)
e2fsprogs: upgrade to the git version
e2fsprogs: add the original mkdebugfs.sh
mkdebugfs.sh: convert the tab to 4 spaces
mkdebugfs.sh: several fixes
e2fsprogs: ship mkfsdebug.sh
image_types.bbclass: replace genext2fs with mkdebugfs.sh
meta/classes/image_types.bbclass | 45 +++++-------
meta/recipes-devtools/e2fsprogs/e2fsprogs.inc | 4 +-
.../{e2fsprogs-1.42.6 => e2fsprogs}/acinclude.m4 | 0
.../fallocate.patch | 0
.../e2fsprogs/e2fsprogs/mkdebugfs.sh | 82 ++++++++++++++++++++++
.../{e2fsprogs-1.42.6 => e2fsprogs}/mkdir.patch | 0
.../remove.ldconfig.call.patch | 0
.../{e2fsprogs_1.42.6.bb => e2fsprogs_git.bb} | 6 +-
8 files changed, 106 insertions(+), 31 deletions(-)
rename meta/recipes-devtools/e2fsprogs/{e2fsprogs-1.42.6 =>
e2fsprogs}/acinclude.m4 (100%)
rename meta/recipes-devtools/e2fsprogs/{e2fsprogs-1.42.6 =>
e2fsprogs}/fallocate.patch (100%)
create mode 100644 meta/recipes-devtools/e2fsprogs/e2fsprogs/mkdebugfs.sh
rename meta/recipes-devtools/e2fsprogs/{e2fsprogs-1.42.6 =>
e2fsprogs}/mkdir.patch (100%)
rename meta/recipes-devtools/e2fsprogs/{e2fsprogs-1.42.6 =>
e2fsprogs}/remove.ldconfig.call.patch (100%)
rename meta/recipes-devtools/e2fsprogs/{e2fsprogs_1.42.6.bb =>
e2fsprogs_git.bb} (92%)
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