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From: Johannes Berg <johannes@sipsolutions.net>
To: Aleksandr Nogikh <a.nogikh@gmail.com>,
	davem@davemloft.net, kuba@kernel.org
Cc: edumazet@google.com, andreyknvl@google.com, dvyukov@google.com,
	elver@google.com, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
	nogikh@google.com
Subject: Re: [PATCH 1/2] net: store KCOV remote handle in sk_buff
Date: Mon, 12 Oct 2020 09:12:13 +0200	[thread overview]
Message-ID: <c310818ecec06fe34d535bb61f3a50a1cf669f40.camel@sipsolutions.net> (raw)
In-Reply-To: <20201007101726.3149375-2-a.nogikh@gmail.com> (sfid-20201007_121758_030318_946D6CEB)

On Wed, 2020-10-07 at 10:17 +0000, Aleksandr Nogikh wrote:
> 
> @@ -904,6 +905,10 @@ struct sk_buff {
>  	__u16			network_header;
>  	__u16			mac_header;
>  
> +#ifdef CONFIG_KCOV
> +	u64			kcov_handle;
> +#endif
[...] 

> @@ -233,6 +233,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
>  	skb->end = skb->tail + size;
>  	skb->mac_header = (typeof(skb->mac_header))~0U;
>  	skb->transport_header = (typeof(skb->transport_header))~0U;
> +	skb_set_kcov_handle(skb, kcov_common_handle());

Btw, you're only setting this here. It seems to me it would make sense
to copy it when the skb is copied, rather than then having it set to the
kcov handle of the (interrupted) task that was copying the skb?

johannes


  parent reply	other threads:[~2020-10-12  7:12 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-07 10:17 [PATCH 0/2] net, mac80211: enable KCOV remote coverage collection for 802.11 frame handling Aleksandr Nogikh
2020-10-07 10:17 ` [PATCH 1/2] net: store KCOV remote handle in sk_buff Aleksandr Nogikh
2020-10-09 23:15   ` Jakub Kicinski
2020-10-10  7:54     ` Dmitry Vyukov
2020-10-10 15:14       ` Jakub Kicinski
2020-10-12  6:04         ` Dmitry Vyukov
2020-10-13 15:59           ` Aleksandr Nogikh
2020-10-13 16:50             ` Jakub Kicinski
2020-10-15 19:04               ` Willem de Bruijn
2020-10-16 14:20                 ` Aleksandr Nogikh
2020-10-12  7:12   ` Johannes Berg [this message]
2020-10-12 10:10     ` Aleksandr Nogikh
2020-10-07 10:17 ` [PATCH 2/2] mac80211: add KCOV remote annotations to incoming frame processing Aleksandr Nogikh
2020-10-07 11:48 ` [PATCH 0/2] net, mac80211: enable KCOV remote coverage collection for 802.11 frame handling Johannes Berg
2020-10-07 14:40   ` Aleksandr Nogikh

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