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    SubjectRe: [PATCH] skip initramfs check

    Hi Rob,

    On Mon, Nov 21, 2005 at 01:30:55AM -0600, Rob Landley wrote:
    > On Thursday 17 November 2005 08:14, Marcelo Tosatti wrote:
    > > Hi,
    > >
    > > The initramfs check at populate_rootfs() can consume significant time
    > > (several seconds) on slow/embedded platforms, since it has to decompress
    > > the image.
    > Query: is the problem that a big initramfs image is being unpacked more than
    > once, or is unpacking an empty initramfs image (134 bytes) causing a
    > significant delay?

    The problem is a big non-initramfs RAMDISK image (used for root mountpoint on this
    particular embedded platform), that is decompressed more than once:

    - during the initramfs check, which fails because it is not initramfs.
    - during the real RAMDISK decompression to memory.

    > I'm fairly certain that back in 1990 I could unzip 134 bytes on my 33 mhz 386
    > running dos in a fraction of a second. What's the use case here?

    So the issue is not the empty initramfs image (which BTW could probably
    be made unecessary?), but a 10Mb RAMDISK image being decompressed by a
    48Mhz PPC, which takes quite a few seconds.

    Need to rework the patch to use a __setup option as Andrew suggested.
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      Last update: 2005-11-21 12:51    [W:0.020 / U:1.648 seconds]
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