netdev - Re: [PATCH][net-next] openvswitch: change the data type of error status to atomic_long

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Message-ID: <CAJFZqHwK=5iXxBP+SgcLtub=HSkTt9Pd6LU2_Tjn9qTxbQd3SA@mail.gmail.com>
Date:	Sun, 7 Sep 2014 17:24:11 +0800
From:	Li RongQing <roy.qing.li@...il.com>
To:	Pravin Shelar <pshelar@...ira.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH][net-next] openvswitch: change the data type of error
 status to atomic_long_t

On Sun, Sep 7, 2014 at 11:44 AM, Pravin Shelar <pshelar@...ira.com> wrote:
>> The operation of atomic maybe faster than spin lock.
>
> What is reason for this change?

1.  The operation of atomic maybe faster than spin lock
2.  I did not find that tx_dropped/tx_error/.. is protected by spin
lock under net dir,
sometime tx_dropped is atomic_long_t; sometime it is percpu variable;
sometime it is
u64,but does not need to protect.

-Roy
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