"Maciej S. Szmigiero" <m...@maciej.szmigiero.name> writes:
> From: "Maciej S. Szmigiero" <maciej.szmigi...@oracle.com>
>
> If zerocopy is enabled for multifd then QIO_CHANNEL_WRITE_FLAG_ZERO_COPY
> flag is forced into all multifd channel write calls via p->write_flags
> that was setup in multifd_nocomp_send_setup().
>
> However, device state packets aren't compatible with zerocopy - the data
> buffer isn't getting kept pinned until multifd channel flush.
>
> Make sure to mask that QIO_CHANNEL_WRITE_FLAG_ZERO_COPY flag in a multifd
> send thread if the data being sent is device state.
>
> Fixes: 0525b91a0b99 ("migration/multifd: Device state transfer support - send
> side")
> Signed-off-by: Maciej S. Szmigiero <maciej.szmigi...@oracle.com>
Reviewed-by: Fabiano Rosas <faro...@suse.de>
