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SubjectRe: 4K stack kernel get Oops in Filesystem stress test
Steve Lord wrote:

> Don't use 4K stacks and XFS. What you hit here is a path where the
> filesystem is getting full and it needs to free some reserved space
> by flushing cached data which is using reserved extents. Reserved
> extents do not yet have an on disk address and they include a
> reservation for the worst case metadata usage. Flushing them will
> get you room back.
>
> As you can see, it is a pretty deep call stack, most of XFS is going
> to work just fine with a 4K stack, but there are end cases like
> this one which will just not fit.


If this is a known truth with XFS maybe it would be a good idea to have
4K stacks and XFS be an impossible combination using the config tool.

--
jeffrey hundstad
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