Re: [PATCH v3] linux-aio: add IO_CMD_FDSYNC command support

[Prasad Pandit]

On Wed, 13 Mar 2024 at 20:48, Stefan Hajnoczi <stefanha@redhat.com> wrote:
> > +extern bool laio_has_fdsync(int);
> Please declare this in include/block/raw-aio.h alongside the other laio APIs.
>
> FDSYNC support should be probed at open() time and the result should be
> stored in a new bool field like s->laio_supports_fdsync. That way the
> cost of laio_has_fdsync() on every flush request is avoided.

* Okay. Here 's' is a BDRVRawState object and file open seems to
happen in the raw_open_common() function? I'll move the
laio_has_fdsync() call there and see how it works.

Thank you.
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  - Prasad