Re: mm: shm: hang in shmem_fallocate

[Sasha Levin]

On 02/08/2014 10:25 PM, Hugh Dickins wrote:
> Would trinity be likely to have a thread or process repeatedly faulting
> in pages from the hole while it is being punched?

I can see how trinity would do that, but just to be certain - Cc davej.

On 02/08/2014 10:25 PM, Hugh Dickins wrote:
> Does this happen with other holepunch filesystems?  If it does not,
> I'd suppose it's because the tmpfs fault-in-newly-created-page path
> is lighter than a consistent disk-based filesystem's has to be.
> But we don't want to make the tmpfs path heavier to match them.

No, this is strictly limited to tmpfs, and AFAIK trinity tests hole
punching in other filesystems and I make sure to get a bunch of those
mounted before starting testing.


Thanks,
Sasha
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