Re: [Xen-devel] [PATCH v2 1/2] argo: warn sendv() caller when ring is full

[Christopher Clark <christopher.w.clark@xxxxxxxxx>]

On Tue, Jun 11, 2019 at 2:14 PM Nicholas Tsirakis
<niko.tsirakis@xxxxxxxxx> wrote:
>
> In its current state, if the destination ring is full, sendv()
> will requeue the message and return the rc of pending_requeue(),
> which will return 0 on success. This prevents the caller from
> distinguishing the difference between a successful write and a
> message that needs to be resent at a later time.
>
> Instead, capture the -EAGAIN value returned from ringbuf_insert()
> and *only* overwrite it if the rc of pending_requeue() is non-zero.
> This allows the caller to make intelligent decisions on -EAGAIN and
> still be alerted if the pending message fails to requeue.
>
> Signed-off-by: Nicholas Tsirakis <tsirakisn@xxxxxxxxxxxx>

This patch has already been approved and applied; so no need to resend
it again, thanks.

Christopher

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