From: David Miller <davem@davemloft.net>
To: mst@redhat.com
Cc: ian.campbell@citrix.com, netdev@vger.kernel.org, eric.dumazet@gmail.com
Subject: Re: [PATCH 7/9] net: add skb_orphan_frags to copy aside frags with destructors
Date: Thu, 03 May 2012 13:55:32 -0400 (EDT) [thread overview]
Message-ID: <20120503.135532.1038384417514973419.davem@davemloft.net> (raw)
In-Reply-To: <20120503154142.GB27671@redhat.com>
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Thu, 3 May 2012 18:41:43 +0300
> On Thu, May 03, 2012 at 03:56:09PM +0100, Ian Campbell wrote:
>> This should be used by drivers which need to hold on to an skb for an extended
>> (perhaps unbounded) period of time. e.g. the tun driver which relies on
>> userspace consuming the skb.
>>
>> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
>> Cc: mst@redhat.com
>
>
> Right. But local sockets queue at socket forever as well.
> I think this should be called in skb_set_owner_r?
>
> This might somewhat penalize speed for local clients in the name
> of correctness but these are rare so being correct is
> more important I think.
But, on the other hand, putting the check into skb_set_owner_r() is a
not so nice test to have in the fast path of every socket receive.
next prev parent reply other threads:[~2012-05-03 17:55 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-03 14:55 [PATCH v5 0/9] skb paged fragment destructors Ian Campbell
2012-05-03 14:56 ` [PATCH 1/9] net: add and use SKB_ALLOCSIZE Ian Campbell
2012-05-03 14:56 ` [PATCH 2/9] net: Use SKB_WITH_OVERHEAD in build_skb Ian Campbell
2012-05-03 14:56 ` [PATCH 3/9] chelsio: use SKB_WITH_OVERHEAD Ian Campbell
2012-05-03 14:56 ` [PATCH 4/9] skb: add skb_shinfo_init and use for both alloc_skb, build_skb and skb_recycle Ian Campbell
2012-05-03 14:56 ` [PATCH 5/9] net: pad skb data and shinfo as a whole rather than individually Ian Campbell
2012-05-03 14:56 ` [PATCH 6/9] net: add support for per-paged-fragment destructors Ian Campbell
2012-05-03 14:56 ` [PATCH 7/9] net: add skb_orphan_frags to copy aside frags with destructors Ian Campbell
2012-05-03 15:41 ` Michael S. Tsirkin
2012-05-03 17:55 ` David Miller [this message]
2012-05-03 21:10 ` Michael S. Tsirkin
2012-05-04 6:54 ` David Miller
2012-05-04 10:03 ` Michael S. Tsirkin
2012-05-04 10:51 ` Ian Campbell
2012-05-06 17:01 ` Michael S. Tsirkin
2012-05-06 13:54 ` Michael S. Tsirkin
2012-05-07 10:24 ` Michael S. Tsirkin
2012-05-09 9:36 ` Ian Campbell
2012-05-03 14:56 ` [PATCH 8/9] net: add paged frag destructor support to kernel_sendpage Ian Campbell
2012-05-10 11:48 ` Michael S. Tsirkin
2012-05-03 14:56 ` [PATCH 9/9] sunrpc: use SKB fragment destructors to delay completion until page is released by network stack Ian Campbell
[not found] ` <1336056971-7839-9-git-send-email-ian.campbell-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org>
2012-05-10 11:19 ` Michael S. Tsirkin
[not found] ` <20120510111948.GA9609-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-05-10 13:26 ` Ian Campbell
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