Re: LFS (2+GB) problems.

From: Jakub Jelinek (jakub@redhat.com)
Date: Fri Feb 04 2000 - 11:52:52 EST


On Fri, Feb 04, 2000 at 09:32:38AM -0500, Mike Panetta wrote:
> Just resently I have started messing with the lfs facilities now
> in place in the devel kernels and I have run into a few problems.
>
> A bit of info on what I had to do to get the stuff to work (not problems
> just general info)
>
> o Install new glibc 2.1.3 snapshot (previous versions didnt know of
> stat64 syscall?)
> o Rebuilt fileutils to try and fix a problem
> (see below it didnt fix anything unfortunately.)
> o I ran the try-lfs program to create a file it maxed out at 4TB.
> This seems ok?
>
> Here are my problems:
>
> o I can create files larger than 4GB BUT I cannot remove them cleanly.
> o On a reboot e2fsck truncates any file larger than 4GB to 4GB.
>
>
> I am not sure if these are userspace or kernel space problems... But I do know
> that I now have a fully LFS aware rm... (I recompiled fileutils.) and it still
> doesnt seem to work. However it definately looks like somewhere a 32Bit
> number is being coerced into a 64Bit one... esp since 4GB is exactly 2^32...
>
>
> Also... the first time I ran e2fsck it complained to me about having a large
> file on the FS... It said I needed to turn on some flag in the superblock
> (I cant remember the name) to enable LFS support... How do I turn it on
> if e2fsck didnt already? What is the flag named? Is there any real docs
> on how to set up LFS in linux? I cant seem to find any.

That's a bug in kernel ext2 implementation (during conversion to page cache
some parts of file.c and inode.c got lost). I'm looking into it.

Cheers,
    Jakub
___________________________________________________________________
Jakub Jelinek | jakub@redhat.com | http://sunsite.mff.cuni.cz/~jj
Linux version 2.3.41 on a sparc64 machine (1343.49 BogoMips)
___________________________________________________________________

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