Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().

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To: Jarek Poplawski <jarkao2@...>
Cc: David Miller <davem@...>, <netdev@...>, <denys@...>
Date: Tuesday, August 19, 2008 - 4:05 am

On Tue, Aug 19, 2008 at 07:56:23AM +0000, Jarek Poplawski wrote:

htb_destroy can either be called by qdisc_destroy or when a brand
new HTB qdisc fails construction.  The latter case is trivial since
the qdisc has never been used.

In the first case, as you have seen from my previous email, the
entire branch containing the HTB qdisc (that is, either the HTB
qdisc itself if it's being deleted directly, or the branch stemming
from its ancestor that's being deleted) must no longer have any
references to it at all apart from this thread of execution.

As such we can do whatever we want with it, including freeing it.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
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Messages in current thread:
[PATCH] pkt_sched: Destroy gen estimators under rtnl_lock()., Jarek Poplawski, (Mon Aug 11, 4:53 pm)
Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_loc..., Herbert Xu, (Tue Aug 19, 4:05 am)
[PATCH take 2] pkt_sched: Fix qdisc list locking, Jarek Poplawski, (Fri Aug 22, 5:27 am)
Re: [PATCH take 2] pkt_sched: Fix qdisc list locking, David Miller, (Fri Aug 22, 6:23 am)
Re: [PATCH take 2] pkt_sched: Fix qdisc list locking, Herbert Xu, (Fri Aug 22, 6:15 am)
Re: [PATCH take 2] pkt_sched: Fix qdisc list locking, David Miller, (Fri Aug 22, 6:28 am)
[PATCH] pkt_sched: Fix qdisc list locking, Jarek Poplawski, (Fri Aug 22, 4:41 am)
Re: [PATCH] pkt_sched: Fix qdisc list locking, Herbert Xu, (Fri Aug 22, 6:14 am)
Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_loc..., Stephen Hemminger, (Sun Aug 24, 7:26 pm)
Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_loc..., Stephen Hemminger, (Sun Aug 24, 8:29 pm)
Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_loc..., Stephen Hemminger, (Tue Aug 26, 8:24 am)
Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_loc..., Stephen Hemminger, (Tue Aug 26, 8:50 am)
RE: [PATCH take 2] pkt_sched: Fix qdisc_watchdog() vs. dev_d..., Duyck, Alexander H, (Mon Sep 15, 7:44 pm)
Re: [PATCH] pkt_sched: Destroy gen estimators under rtnl_loc..., Denys Fedoryshchenko, (Mon Aug 18, 2:08 am)