From: junjie cai <junjiec@gmail.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: junjiec@gmail.com
Subject: is synchronize_net in inet_register_protosw necessary?
Date: Tue, 14 Jun 2005 23:18:08 +0900 [thread overview]
Message-ID: <ca992f11050614071857cd069b@mail.gmail.com> (raw)
hi all.
i am a newbie to linux kernel.
in a arm926 board i found that it took about 30ms to finish
the (net/ipv4/af_inet.c:898) inet_register_protosw
because of the synchronize_net call during profiling.
synchronize_net finally calls synchronize_rcu, so i think
this is to make the change visiable after a list_add_rcu.
but according to the Document/listRCU.txt it seems that
a list insertation does not necessarily do call_rcu etc.
may i have any mistakes, please kindly tell me.
next reply other threads:[~2005-06-14 14:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-14 14:18 junjie cai [this message]
2005-06-16 17:15 ` is synchronize_net in inet_register_protosw necessary? Paul E. McKenney
2005-06-16 22:07 ` Paul E. McKenney
2005-06-17 1:37 ` junjie cai
2005-06-18 1:35 ` Paul E. McKenney
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