Re: question: should io_is_direct really return true for DAX inodes?

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[ reply-all re-send, sorry for the duplicate Jeff. ]

On Thu, Oct 29, 2015 at 11:32 PM, Jeff Moyer <jmoyer@xxxxxxxxxx> wrote:
> Hi,
>
> I'm concerned that applications that used to run out of page cache will
> experience a performance degradation when being forced into doing I/O
> directly to the backing store.  What do others think?
>

I would think this is only a problem in the case where the media is
orders of magnitude slower than page cache.  That isn't the case with
pmem.
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