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SubjectRe: 2.4.0-test10-pre3:Oops in mm/filemap.c:filemap_write_pa
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Petr Vandrovec writes:
> ... or from sys_exit() if you forget to unmap. Or from anywhere if
> swapping code decides to swap such page. I'm trying to hunt it down
> for more than month, but I have no idea what's wrong. In my case
> way to trigger bug is:

I actually think its as simple as:

1. shared map a file
2. close file
3. unlink file
4. unmap shared mapping

In my case, I was running newaliases, and there wasn't any other
processes using that mapping.
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