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    SubjectRe: "mount -o loop" lockup issue
    It's a bug in Linux 2.4.2, fixed in later versions.  Regression/quality control
    testing would
    have caught this, but the developers usually just break things and wait for people
    to complain
    as their "Regression" testers.

    Jason Madden wrote:

    > On Mon, 26 Mar 2001, David E. Weekly wrote:
    >
    > > On Linux 2.4.2, running a "mount -o loop" on a file properly created with
    > > "dd if=/dev/zero of=/path/to/my/file.img count=1024" seems to decide to
    > > freeze up my shell (not my system). An strace showed the lockup happening at
    > > the actual system "mount()" call, which never returns.
    > >
    > > Since mount() is in glibc, it might be relevant to note that I'm running
    > > Mandrake's glibc 2.1.3-16mdk. I compiled the kernel with a gcc of 2.95.3
    > > [1991030] (although oddly enough this binary seems to have come with the
    > > gcc-2.95.2 RPM and installed itself as /usr/bin/gcc-2.95.2) and binutils
    > > 2.10.0.24-4mdk.
    > I also experience this problem (using a floppy disk image created by
    > dd if=/dev/fd0 of=floppy.img bs=1024, and then mount -o loop
    > floppy.img /mnt/floppy ) with a different version
    > of glibc (RedHat's 2.1.92-5 rpm) and binutils (binutils-2.10.0.18-1). Loop
    > is compiled into the kernel.
    >
    > Once the mount command was executed, my load average shot up to a steady
    > 1.0 on an idle system, and remained there until I rebooted. top
    > et. al. showed no cpu utilization by the frozen mount.
    >
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