From: Andrew Lunn <andrew@lunn.ch>
To: The list for a Better Approach To Mobile Ad-hoc Networking
<b.a.t.m.a.n@lists.open-mesh.org>
Subject: Re: [B.A.T.M.A.N.] slowpath warning
Date: Mon, 1 Mar 2010 06:59:55 +0100 [thread overview]
Message-ID: <20100301055955.GC15286@lunn.ch> (raw)
In-Reply-To: <20100228163428.GA15370@pandem0nium>
Hi Simon
> @@ -503,15 +550,23 @@
> unsigned long flags;
>
> spin_lock_irqsave(&vis_hash_lock, flags);
> +
> purge_vis_packets();
>
> - if (generate_vis_packet() == 0)
> + if (generate_vis_packet() == 0) {
> /* schedule if generation was successful */
> + kref_get(&my_vis_info->refcount);
> list_add_tail(&my_vis_info->send_list, &send_list);
> + }
>
> list_for_each_entry_safe(info, temp, &send_list, send_list) {
> + spin_unlock_irqrestore(&vis_hash_lock, flags);
> +
> + send_vis_packet(info);
> +
> + spin_lock_irqsave(&vis_hash_lock, flags);
> list_del_init(&info->send_list);
> - send_vis_packet(info);
> + kref_put(&info->refcount, free_info);
> }
> spin_unlock_irqrestore(&vis_hash_lock, flags);
> start_vis_timer();
Although you say this works, i just looks wrong. It looks
unbalanced. Where is the kref_put for my_vis_info->refcount? There is
a kref_put inside what looks like a loop, but no kref_get inside the
loop.
Can you explain this is more detail? Can we make it look correctly
balanced?
Thanks
Andrew
next prev parent reply other threads:[~2010-03-01 5:59 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-23 17:46 [B.A.T.M.A.N.] bat_events: page allocation failure (batman-adv maint) Linus Lüssing
2010-01-23 18:10 ` Andrew Lunn
2010-01-23 23:30 ` Linus Lüssing
2010-01-24 20:42 ` Linus Lüssing
2010-01-24 21:00 ` Andrew Lunn
2010-01-25 6:46 ` Andrew Lunn
2010-01-25 6:47 ` Andrew Lunn
2010-01-25 8:21 ` Marek Lindner
2010-01-26 1:48 ` Linus Lüssing
2010-01-24 4:24 ` Linus Lüssing
2010-01-26 6:13 ` [B.A.T.M.A.N.] slowpath warning Linus Lüssing
2010-01-26 7:16 ` Marek Lindner
2010-01-27 0:10 ` Linus Lüssing
2010-01-28 0:09 ` Marek Lindner
2010-01-28 6:29 ` Andrew Lunn
2010-01-29 8:25 ` Andrew Lunn
2010-01-29 8:59 ` Marek Lindner
2010-01-30 16:50 ` Andrew Lunn
2010-01-31 19:37 ` Linus Lüssing
2010-01-31 20:56 ` Andrew Lunn
2010-02-11 9:46 ` Andrew Lunn
2010-02-11 10:01 ` Andrew Lunn
2010-02-19 17:19 ` Linus Lüssing
2010-02-20 18:04 ` Andrew Lunn
2010-02-21 13:10 ` Linus Lüssing
2010-02-28 16:34 ` Simon Wunderlich
2010-03-01 5:59 ` Andrew Lunn [this message]
2010-03-01 16:57 ` Simon Wunderlich
2010-03-02 6:43 ` Andrew Lunn
2010-03-02 21:13 ` Simon Wunderlich
2010-03-02 21:26 ` elektra
2010-03-02 21:44 ` Linus Lüssing
2010-03-04 0:26 ` Linus Lüssing
2010-03-04 8:57 ` Andrew Lunn
2010-03-04 9:19 ` Marek Lindner
2010-03-04 9:49 ` Andrew Lunn
2010-03-04 10:00 ` Marek Lindner
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