Re: cvs commit: src/sys/net bpf.c

["Sepherosa Ziehau" <sepherosa@xxxxxxxxx>]

On Sun, Aug 17, 2008 at 11:44 AM, Sepherosa Ziehau
<sephe@crater.dragonflybsd.org> wrote:
> sephe       2008/08/16 20:44:48 PDT
>
> DragonFly src repository
>
>  Modified files:
>    sys/net              bpf.c
>  Log:
>  Various tap functions of bpf(4) are the only non-MPSAFE code on ethernet
>  input path (in polling or interrupt threads), so push mplock holding down
>  into bpf(4) tap functions.  Also re-check the bpf_if after holding mplock
>  to avoid use-after-check race.

I suggest to set kern.intr_mpsafe to 1 after this change.  I have used
it for at least one year, except the bpf issue, I didn't notice any
other trouble

Best Regards,
sephe

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