reproducible "panic: share->excl"

[Andrew Gallatin]

Kostik Belousov wrote:
> 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.

Yes, the patch fixes the panic.

Thank you,

Drew