From: David Miller <davem@davemloft.net>
To: heiner.kallweit@web.de
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH] ipv6: Avoid unnecessary temporary addresses being generated
Date: Wed, 12 Mar 2014 16:48:14 -0400 (EDT) [thread overview]
Message-ID: <20140312.164814.33998602249906578.davem@davemloft.net> (raw)
In-Reply-To: <5320BB4C.9060400@web.de>
From: Heiner Kallweit <heiner.kallweit@web.de>
Date: Wed, 12 Mar 2014 20:53:48 +0100
> @@ -1103,8 +1103,11 @@ retry:
> * Lifetime is greater than REGEN_ADVANCE time units. In particular,
> * an implementation must not create a temporary address with a zero
> * Preferred Lifetime.
> + * Use age calculation as in addrconf_verify to avoid unnecessary
> + * temporary addresses being generated.
> */
> - if (tmp_prefered_lft <= regen_advance) {
> + age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
> + if (tmp_prefered_lft <= regen_advance + age) {
I think you must use tmp_tstamp here, we snapshot all of the values
above into local variables while holding the lock so that we calculate
a consistent set of values and tests.
next prev parent reply other threads:[~2014-03-12 20:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-12 19:53 [PATCH] ipv6: Avoid unnecessary temporary addresses being generated Heiner Kallweit
2014-03-12 20:48 ` David Miller [this message]
2014-03-12 21:16 ` Heiner Kallweit
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