netdev - Re: [PATCH net-next v4 2/2] bnxt_en: replace PTP spinlock with seqlock

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Message-ID: <CACKFLikK8jccgHijxaVqrsM_hD-9drxK_rrg=5+Vb-oLtyj0kA@mail.gmail.com>
Date: Wed, 30 Oct 2024 09:54:58 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: Vadim Fedorenko <vadfed@...a.com>
Cc: Vadim Fedorenko <vadim.fedorenko@...ux.dev>, Pavan Chebbi <pavan.chebbi@...adcom.com>, 
	Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew+netdev@...n.ch>, Paolo Abeni <pabeni@...hat.com>, 
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org, 
	Richard Cochran <richardcochran@...il.com>
Subject: Re: [PATCH net-next v4 2/2] bnxt_en: replace PTP spinlock with seqlock

On Tue, Oct 29, 2024 at 1:55 PM Vadim Fedorenko <vadfed@...a.com> wrote:
>
> We can see high contention on ptp_lock while doing RX timestamping
> on high packet rates over several queues. Spinlock is not effecient
> to protect timecounter for RX timestamps when reads are the most
> usual operations and writes are only occasional. It's better to use
> seqlock in such cases.
>
> Signed-off-by: Vadim Fedorenko <vadfed@...a.com>
Thanks.
Reviewed-by: Michael Chan <michael.chan@...adcom.com>

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