reproducible "panic: share->excl"

[Kostik Belousov]

On Tue, Jul 22, 2008 at 01:15:12PM -0400, Andrew Gallatin wrote:
> Kostik Belousov wrote:
> 
> >Essentially, you tried to do the write of the part of the region mmaped
> >from the file, to the file. The VOP_WRITE() is called with exclusively
> >locked vnode, while fault handler tried to lock the vnode in shared mode
> >to page in.
> 
> Yes, the operations attempted were rather nonsensical, but should
> not have killed the system.  Thank you for looking into it.

Why nonsensical ? The operations are legitimate, and kernel must not panic.

The question still open is whether the patch fixed the issue for you.
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