From: Evgeniy Polyakov <zbr@ioremap.net>
To: Johann Baudy <johann.baudy@gnu-log.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
Patrick McHardy <kaber@trash.net>, jamal <hadi@cyberus.ca>
Subject: Re: [PATCH] TX_RING and packet mmap
Date: Sun, 12 Apr 2009 14:32:12 +0400 [thread overview]
Message-ID: <20090412103212.GA28397@ioremap.net> (raw)
In-Reply-To: <7e0dd21a0904120327q537956abkf75a17d477cc2e61@mail.gmail.com>
Hi Johann.
Sorry for long reply.
On Sun, Apr 12, 2009 at 12:27:04PM +0200, Johann Baudy (johann.baudy@gnu-log.net) wrote:
> Do you mean that skb_shinfo(skb)->frags[i].page will be valid until
> destructor? even if linearized, cloned ....?
Page itself will live until destruction time, when skb is linearized
page is freed, so your own destructor will find that given page is no
longer used, and appropriate memory area can be overwritten.
When skb is cloned, page is untouched, only shared info reference
counter is increased.
--
Evgeniy Polyakov
next prev parent reply other threads:[~2009-04-12 10:32 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-02 19:48 [PATCH] TX_RING and packet mmap Johann Baudy
2009-04-07 7:26 ` Herbert Xu
2009-04-07 12:48 ` jamal
2009-04-07 13:04 ` Herbert Xu
2009-04-07 13:47 ` jamal
2009-04-07 14:17 ` Herbert Xu
2009-04-07 14:40 ` Johann Baudy
[not found] ` <7e0dd21a0904070738jd8a2714wd840352699f1e9f1@mail.gmail.com>
2009-04-07 20:56 ` jamal
2009-04-07 21:11 ` Evgeniy Polyakov
2009-04-08 21:06 ` Johann Baudy
2009-04-12 10:27 ` Johann Baudy
2009-04-12 10:32 ` Evgeniy Polyakov [this message]
2009-04-12 11:23 ` Johann Baudy
2009-04-12 14:24 ` Evgeniy Polyakov
2009-04-12 19:27 ` Johann Baudy
2009-04-12 19:52 ` Evgeniy Polyakov
2009-04-12 20:30 ` Johann Baudy
2009-04-12 20:53 ` Evgeniy Polyakov
2009-04-12 23:31 ` Johann Baudy
2009-04-15 7:10 ` Evgeniy Polyakov
2009-04-15 13:14 ` Johann Baudy
2009-04-16 11:16 ` Evgeniy Polyakov
2009-04-18 21:38 ` Johann Baudy
2009-04-21 9:41 ` Evgeniy Polyakov
2009-04-21 13:16 ` Johann Baudy
2009-04-21 13:56 ` Evgeniy Polyakov
2009-04-08 6:51 ` Herbert Xu
2009-04-21 15:36 ` Christoph Lameter
2009-04-21 20:13 ` Johann Baudy
2009-04-21 20:42 ` Christoph Lameter
2009-04-21 21:00 ` Johann Baudy
2009-04-21 21:00 ` Christoph Lameter
2009-04-21 21:13 ` Johann Baudy
2009-04-21 20:46 ` Johann Baudy
2009-04-21 20:43 ` Christoph Lameter
2009-04-21 21:05 ` Johann Baudy
2009-04-21 21:08 ` Christoph Lameter
-- strict thread matches above, loose matches on Subject: below --
2009-04-26 13:06 Johann Baudy
2009-04-29 9:18 ` Evgeniy Polyakov
2009-04-30 20:17 ` Johann Baudy
2009-05-05 21:38 Johann Baudy
2009-05-06 7:07 ` Jarek Poplawski
2009-05-06 9:38 ` Jarek Poplawski
2009-05-09 20:31 ` David Miller
2009-05-11 21:21 Johann Baudy
2009-05-12 16:11 ` Andi Kleen
[not found] ` <7e0dd21a0905121058m1f894de6q9805e5392aef3aea@mail.gmail.com>
2009-05-12 18:00 ` Johann Baudy
[not found] ` <7e0dd21a0905121058m1f894de6q9805e5392aef3aea-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2009-05-12 18:15 ` Andi Kleen
2009-05-19 5:12 ` David Miller
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