Re: Odd NFS related SIGBUS (& possible fix)

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On Wed, 2010-09-29 at 14:33 +1000, Benjamin Herrenschmidt wrote:

> Now regarding the other bug, unless Trond has an idea already, I think I'll start
> a separate email thread once I've collected more data. I -think- it invalidates it
> because it sees a the server mtime that is more recent than the inode, but the
> server shouldn't be touching at files, so I suspect we get confused somewhere in
> the kernel and I don't know why yet (the code path inside NFS aren't obvious to
> me at this stage).

Ok, so that doesn't happen with current upstream (we were on some
2.6.32.16 based kernel here). I'll figure that out from there.

However, I still think there's a potential erroneous sigbus in the NFS
page_mkwrite() code path unless I'm mistaken.

Cheers,
Ben.


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