[OE-core] [PATCH 0/4] replace genext2fs with populate-extfs.sh
Darren Hart
dvhart at linux.intel.com
Tue May 7 22:48:45 UTC 2013
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
>
--
Darren Hart
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel
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