Re: [PATCH 1/1] image.bbclass: check INITRAMFS_MAXSIZE

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

On 01/26/2016 12:30 AM, Scott Rifenbark wrote:
> Hi,
>
> I noticed we do not document INITRAMFS_MAXSIZE in the ref-manual.  Should we be?

Yes, I will update the doc after the patch is merged.

// Robert

>
> Thanks,
> Scott
>
> On Mon, Jan 25, 2016 at 12:45 AM, Robert Yang <liezhi.yang@windriver.com
> <mailto:liezhi.yang@windriver.com>> wrote:
>
>     Usually, the initramfs' maxsize can be 1/2 of ram size since modern
>     kernel uses tmpfs as initramfs by dafault, and tmpfs allocates 1/2 of
>     ram by default at boot time, which will be used to locate the initramfs.
>
>     Set INITRAMFS_MAXSIZE to 131072K (128M) by default (ram 256M), the
>     initramfs is small usually, for example, core-image-minimal-initramfs is
>     about 21M (uncompressed, 17M * 1.3) by default, but if the user add a
>     lot pkgs to initramfs, we can error and stop to let the user know ealier
>     rather than fail to boot (e.g., OOM-killer) at boot time.
>
>     Please see the bug for more info:
>     https://bugzilla.yoctoproject.org/show_bug.cgi?id=5963
>
>     [YOCTO #5963]
>
>     Signed-off-by: Robert Yang <liezhi.yang@windriver.com
>     <mailto:liezhi.yang@windriver.com>>
>     ---
>       meta/classes/image.bbclass |   14 +++++++++++++-
>       meta/conf/bitbake.conf     |    6 ++++++
>       2 files changed, 19 insertions(+), 1 deletion(-)
>
>     diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
>     index 3870516..30d1173 100644
>     --- a/meta/classes/image.bbclass
>     +++ b/meta/classes/image.bbclass
>     @@ -423,6 +423,9 @@ def get_rootfs_size(d):
>           rootfs_req_size = int(d.getVar('IMAGE_ROOTFS_SIZE', True))
>           rootfs_extra_space = eval(d.getVar('IMAGE_ROOTFS_EXTRA_SPACE', True))
>           rootfs_maxsize = d.getVar('IMAGE_ROOTFS_MAXSIZE', True)
>     +    image_fstypes = d.getVar('IMAGE_FSTYPES', True) or ''
>     +    initramfs_fstypes = d.getVar('INITRAMFS_FSTYPES', True) or ''
>     +    initramfs_maxsize = d.getVar('INITRAMFS_MAXSIZE', True)
>
>           output = subprocess.check_output(['du', '-ks',
>                                             d.getVar('IMAGE_ROOTFS', True)])
>     @@ -443,8 +446,17 @@ def get_rootfs_size(d):
>           if rootfs_maxsize:
>               rootfs_maxsize_int = int(rootfs_maxsize)
>               if base_size > rootfs_maxsize_int:
>     -            bb.fatal("The rootfs size %d(K) overrides the max size %d(K)" % \
>     +            bb.fatal("The rootfs size %d(K) overrides IMAGE_ROOTFS_MAXSIZE:
>     %d(K)" % \
>                       (base_size, rootfs_maxsize_int))
>     +
>     +    # Check the initramfs size against INITRAMFS_MAXSIZE (if set)
>     +    if image_fstypes == initramfs_fstypes != ''  and initramfs_maxsize:
>     +        initramfs_maxsize_int = int(initramfs_maxsize)
>     +        if base_size > initramfs_maxsize_int:
>     +            bb.error("The initramfs size %d(K) overrides INITRAMFS_MAXSIZE:
>     %d(K)" % \
>     +                (base_size, initramfs_maxsize_int))
>     +            bb.error("You can set INITRAMFS_MAXSIZE a larger value.
>     Usually, it should")
>     +            bb.fatal("be less than 1/2 of ram size, or you may fail to boot
>     it.\n")
>           return base_size
>
>       python set_image_size () {
>     diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
>     index 7451eb8..e80ee18 100644
>     --- a/meta/conf/bitbake.conf
>     +++ b/meta/conf/bitbake.conf
>     @@ -712,7 +712,13 @@ require conf/sanity.conf
>       DL_DIR ?= "${TOPDIR}/downloads"
>       SSTATE_DIR ?= "${TOPDIR}/sstate-cache"
>       IMAGE_FSTYPES ?= "tar.gz"
>     +
>       INITRAMFS_FSTYPES ?= "cpio.gz"
>     +# The maximum size in Kbytes for the generated initramfs image size.
>     +# Usually, it should be less than 1/2 of ram size, or you may fail to
>     +# boot it.
>     +INITRAMFS_MAXSIZE ??= "131072"
>     +
>       DEFAULT_TASK_PROVIDER ?= "packagegroup-base"
>       MACHINE_TASK_PROVIDER ?= "${DEFAULT_TASK_PROVIDER}"
>
>     --
>     1.7.9.5
>
>     --
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