Re: O_DIRECT on deep-scrub read

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It's not, but it would not be ahrd to do this.  There are fadvise-style 
hints being passed down that could trigger O_DIRECT reads in this case.  
That may not be the best choice, though--it won't use data that happens 
to be in cache and it'll also throw it out..

On Wed, 7 Oct 2015, Pawe? Sadowski wrote:

> Hi,
> 
> Can anyone tell if deep scrub is done using O_DIRECT flag or not? I'm
> not able to verify that in source code.
> 
> If not would it be possible to add such feature (maybe config option) to
> help keeping Linux page cache in better shape?
> 
> Thanks,
> 
> -- 
> PS
> 
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