On Fri, Aug 18, 2017 at 11:54:02AM -0600, Liu Bo wrote:
> While we submit direct writes, if the inode is flagged with nodatasum,
> there's no benefit to submit asynchronously, because
>
> a) we don't have to calculate checksum across processors,
>
> b) and direct IO has started a plug, but async
While we submit direct writes, if the inode is flagged with nodatasum,
there's no benefit to submit asynchronously, because
a) we don't have to calculate checksum across processors,
b) and direct IO has started a plug, but async submit makes us queue
IO on each device's scheduled IO list instead
