Re: [PATCH 0/4] replace genext2fs with populate-extfs.sh

[Robert Yang <liezhi.yang@windriver.com>]

Hi Darren,

No, I haven't sent them to the ext mailing list, can we merge them in
oe-core and then back port to the ext community ? Or I should send them
to the ext mailing list first ?

// Robert

On 05/08/2013 06:48 AM, Darren Hart wrote:
> Have these been reviewed on the ext mailing list already?
>
> --
> Darren
>
> On 05/07/2013 02:48 AM, Robert Yang wrote:
>> * The benefits:
>>    - Really support ext4
>>    - Support the sparse file (the sparse file became into the common file before)
>>    - Have a uniform code for ext2/3/4 generation
>>    - Remove the depends on genext2fs-native
>>
>> * Impact
>>    - Build time:
>>      a) If we build fresh core-image-sato, there is nearly no impact.
>>      b) If we do the image generation, which means:
>>         $ bitbake core-image-sato
>>         $ bitbake core-image-sato -ccleansstate
>>         $ bitbake core-image-sato
>>     About 50 extra seconds are needed, here is my test result:
>>     Before the patches: 4m25s
>>     After the patches: 5m17s
>>     This is because the genext2fs is much faster than the
>>     populate-extfs.sh, we will replace this script by the mke2fs when it
>>     supports create the filesystem from a initial directory.
>>
>>    - Disk space (take core-image-sato as an example)
>>      a) The image file size is the same as before (529M)
>>      b) The disk usage is a little different: (du -sh)
>>                before       now
>>         ext2:  364M         388M
>>         ext3:  381M         404M
>>         ext4:  380M         387M
>>
>>     We may need to adjust the IMAGE_OVERHEAD_FACTOR from 1.3 to 1.4.
>>
>>     I have done some simple runtime testing on core-image-sato and
>>     core-image-minimal, they worked well.
>>
>> // Robert
>>
>> The following changes since commit 3472c1f7ab409cd91c1d4782d9e00880b84e3ae8:
>>
>>    grub-efi-native: Cleanup whitespace (2013-05-03 16:37:05 +0100)
>>
>> are available in the git repository at:
>>
>>    git://git.pokylinux.org/poky-contrib robert/ext4
>>    http://git.pokylinux.org/cgit.cgi/poky-contrib/log/?h=robert/ext4
>>
>> Robert Yang (4):
>>    e2fsprogs: the max length of debugfs argument is too short
>>    e2fsprogs: let debugfs do sparse copy
>>    e2fsprogs: add populate-extfs.sh
>>    image_types.bbclass: replace genext2fs with populate-extfs.sh
>>
>>   meta/classes/image_types.bbclass                   |   46 ++++----
>>   .../e2fsprogs-1.42.7/debugfs-too-short.patch       |   28 +++++
>>   .../e2fsprogs/e2fsprogs-1.42.7/populate-extfs.sh   |   93 ++++++++++++++++
>>   .../e2fsprogs/e2fsprogs-1.42.7/sparse_copy.patch   |  114 ++++++++++++++++++++
>>   .../recipes-devtools/e2fsprogs/e2fsprogs_1.42.7.bb |    4 +
>>   5 files changed, 257 insertions(+), 28 deletions(-)
>>   create mode 100644 meta/recipes-devtools/e2fsprogs/e2fsprogs-1.42.7/debugfs-too-short.patch
>>   create mode 100644 meta/recipes-devtools/e2fsprogs/e2fsprogs-1.42.7/populate-extfs.sh
>>   create mode 100644 meta/recipes-devtools/e2fsprogs/e2fsprogs-1.42.7/sparse_copy.patch
>>
>