netdev - Re: [PATCH net-next 10/10] bnxt_en: Remove atomic operations on ptp->tx

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Message-ID: <CACKFLi=fAUHa=6WfVCi4=XMqYui8ErP-cuBs0o_jacFb_L_+qQ@mail.gmail.com>
Date: Thu, 27 Jun 2024 08:43:36 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: Pavan Chebbi <pavan.chebbi@...adcom.com>
Cc: Przemek Kitszel <przemyslaw.kitszel@...el.com>, netdev@...r.kernel.org, 
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, 
	andrew.gospodarek@...adcom.com, richardcochran@...il.com, davem@...emloft.net
Subject: Re: [PATCH net-next 10/10] bnxt_en: Remove atomic operations on ptp->tx_avail

On Thu, Jun 27, 2024 at 8:34 AM Pavan Chebbi <pavan.chebbi@...adcom.com> wrote:
>
> On Thu, Jun 27, 2024 at 3:10 PM Przemek Kitszel
> <przemyslaw.kitszel@...el.com> wrote:
> >
> > On 6/26/24 18:43, Michael Chan wrote:
> > > From: Pavan Chebbi <pavan.chebbi@...adcom.com>
> > >
> > > Now that we require the spinlock to protect ptp->txts_prod, change
> > > ptp->tx_avail to non-atomic and protect it under the same spinlock.
> >
> > Under what condition you will exceed those 4 entries?
>
> Only when an application chooses to do so.

The practical scenario is on a Multi-host system sharing the same NIC
with multiple hosts running PTP applications.

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