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SubjectRe: [PATCH] f2fs: provide a way to attach HIPRI for Direct IO
On 11/09, Jens Axboe wrote:
> On 11/9/21 9:39 AM, Christoph Hellwig wrote:
> > On Mon, Nov 08, 2021 at 06:13:36PM -0800, Jaegeuk Kim wrote:
> >> This patch adds a way to attach HIPRI by expanding the existing sysfs's
> >> data_io_flag. User can measure IO performance by enabling it.
> >
> > NAK. This flag should only be used when explicitly specified by
> > the submitter of the I/O.
>
> Yes, this cannot be set in the middle for a multitude of reasons. I wonder
> if we should add a comment to that effect near the definition of it.

Not surprising. I was wondering we can add this for testing purpose only.
Btw, is there a reasonable way that filesystem can use IO polling?

>
> --
> Jens Axboe

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