From: jamal <hadi@cyberus.ca>
To: Jarek Poplawski <jarkao2@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
David Miller <davem@davemloft.net>,
netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH net-next V3] net: dynamic ingress_queue allocation
Date: Sun, 03 Oct 2010 09:10:34 -0400 [thread overview]
Message-ID: <1286111434.3812.208.camel@bigi> (raw)
In-Reply-To: <20101003094221.GA2028@del.dom.local>
On Sun, 2010-10-03 at 11:42 +0200, Jarek Poplawski wrote:
> >
> > To avoid a NULL dereference some lines later.
> > Do I have a guarantee its not NULL here ?
>
> Do you have any scenario for NULL here? ;-)
This is why i called this part clever earlier ;-> It is
clever. There are several scenarios (i attempted to represent them
in the tests that Eric run):
1) ingress qdisc has been compiled in
flags & TCQ_F_INGRESS is true
a) user trying to add ingress qdisc first time
then q is null, new is not null and this would work
b) user trying to delete already added qdisc
then q is not null, new is null
2) ingress qdisc not compiled in
Repeat #1a above, and Eric's check will bail out ..
The one thing that may have been useful is to also try
a "replace" after #1a and maybe after #2
cheers,
jamal
next prev parent reply other threads:[~2010-10-03 13:10 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-28 15:58 [PATCH net-next2.6] net: rename netdev rx_queue to ingress_queue Eric Dumazet
2010-09-28 18:04 ` Jarek Poplawski
2010-09-29 10:56 ` jamal
2010-09-29 13:18 ` Jarek Poplawski
2010-09-29 16:54 ` Jarek Poplawski
2010-09-30 22:58 ` [PATCH net-next2.6] net: dynamic ingress_queue allocation Eric Dumazet
2010-10-01 11:45 ` jamal
2010-10-01 13:56 ` [PATCH net-next V2] " Eric Dumazet
2010-10-02 9:32 ` Jarek Poplawski
2010-10-02 16:11 ` [PATCH net-next V3] " Eric Dumazet
2010-10-03 9:42 ` Jarek Poplawski
2010-10-03 13:10 ` jamal [this message]
2010-10-04 8:42 ` Eric Dumazet
2010-10-04 9:00 ` [PATCH net-next] net: relax rtnl_dereference() Eric Dumazet
2010-10-05 7:29 ` David Miller
2010-10-04 12:06 ` [PATCH net-next V3] net: dynamic ingress_queue allocation Jarek Poplawski
2010-10-04 12:52 ` Eric Dumazet
2010-10-04 14:24 ` Jarek Poplawski
2010-10-04 15:21 ` Eric Dumazet
2010-10-05 7:24 ` David Miller
2010-10-05 7:31 ` Eric Dumazet
2010-10-02 12:10 ` [PATCH net-next V2] " jamal
2010-09-29 20:27 ` [PATCH net-next2.6] net: rename netdev rx_queue to ingress_queue David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1286111434.3812.208.camel@bigi \
--to=hadi@cyberus.ca \
--cc=davem@davemloft.net \
--cc=eric.dumazet@gmail.com \
--cc=jarkao2@gmail.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.