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xen-devel
Re: [Xen-devel] Very odd filesystem problem in dom0
Just to confirm: you are seeing this problem on 2.6.8.1-xen? I can
reproduce on 2.6 but not on 2.4. Looks like the arguments go into
execve() but get lost sometime during the exec syscall...
-- Keir
> OK, this is definitely related to the length of the exec string, and the exec
> getting corrupted. I can't recreate it with the obvious echo `perl print
> 'a'x100`,
> but I can create it with the length of filenames in the directory -- i've
> even
> gotten it to corrupt to the point that argv[0] is showing up later in the arg
> string:
>
> """
> root@durandal:~/temp# ls *
> : : No such file or directory
> : : No such file or directory
> : : No such file or directory
> /bin/ls*
> 2222222222
> 3333333333
> 4444444444
> aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa0
> ....
> """
>
> /bin/ls was obviously not in that directory.
>
> I'll keep working on narrowing it down more and looking at the kernel code.
>
> -m
>
> On Wed, Oct 06, 2004 at 10:49:42AM -0400, urmk@xxxxxxxxxxxxxxxxx wrote:
> > Ah-hah. It was just sugested to me that the size of the directory might
> > matter:
> > It's not quite the number of files, it's the lengh of the argument character
> > string. (Sorry, writing this email stream-of-thought as I test different
> > thing)
> >
> > Filling a test directory with 100 files (for x in `seq 0 100`; do touch $x;
> > done)
> > doesn't trigger it, but filling a test dir with 100 files with long names
> > (touch aaaaaaaaaaaaaaaaaaaaaa-$x) does.
> >
> > Is xeno changing the size of the exec string buffer in the kernel?
>
>
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