Re: [Qemu-devel] Heads up: glibc preadv emulation breaks qemu on older kernels

[Richard W.M. Jones]

On Fri, Feb 12, 2010 at 11:28:57AM -0600, Anthony Liguori wrote:
> I think a configure option would be in order.  Forever avoiding glibc is  
> probably a bit extreme.

I think a configure option won't work.  The issue here was that
the binary is being installed on a machine with an older
kernel.

Unfortunately it's pretty hard to test this at runtime too (preadv
doesn't return ENOSYS, and there isn't really a good way to test if
the preadv "syscall" is broken because the randomly aligned buffer
might be aligned OK).

I don't think there's a good solution for this at the qemu level.
However I have a working patch for glibc:

https://bugzilla.redhat.com/show_bug.cgi?id=563103#c13

Rich.

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