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Re: [PATCH] Stochastic Fair Blue queue discipline

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To: Andi Kleen <andi@...>
Cc: <netdev@...>
Date: Wednesday, April 9, 2008 - 11:45 am

>> > no net_random/srandom32 is per CPU and likely does the wrong thing for you.



I'm sorry to be such a pain, but I still don't understand.

Random32 is initialised from get_random_bytes; so the per-cpu
pseudo-random sequences should be uncorrelated.  I fail to see how an
arbitrary interleaving of uncorrelated good pseudo-random sequences
can fail to be good.

Looking at line 448 of sch_sfq.c in Linus' current HEAD, I see that
somebody else thinks the same as I do.  So please let me know if sfq
needs fixed, or whether I can use net_random in sfb.

Thanks,

                                        Juliusz
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Messages in current thread:
[PATCH] Stochastic Fair Blue queue discipline, Juliusz Chroboczek, (Mon Apr 7, 6:37 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Tue Apr 8, 12:44 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Andi Kleen, (Tue Apr 8, 4:20 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Juliusz Chroboczek, (Tue Apr 8, 11:38 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Andi Kleen, (Tue Apr 8, 12:32 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Juliusz Chroboczek, (Tue Apr 8, 1:35 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Andi Kleen, (Tue Apr 8, 1:53 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Juliusz Chroboczek, (Wed Apr 9, 11:45 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Andi Kleen, (Wed Apr 9, 1:49 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Wed Apr 9, 9:23 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Andi Kleen, (Thu Apr 10, 3:36 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Wed Apr 9, 9:38 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Stephen Hemminger, (Thu Apr 10, 10:04 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Juliusz Chroboczek, (Thu Apr 10, 7:17 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Fri Apr 11, 9:07 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Tue Apr 8, 8:11 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Juliusz Chroboczek, (Tue Apr 8, 11:39 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Tue Apr 8, 11:45 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Juliusz Chroboczek, (Wed Apr 9, 11:48 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Wed Apr 9, 12:00 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Mon Apr 7, 8:04 pm)
Re: [PATCH] Stochastic Fair Blue queue discipline, Juliusz Chroboczek, (Tue Apr 8, 11:28 am)
Re: [PATCH] Stochastic Fair Blue queue discipline, Patrick McHardy, (Mon Apr 7, 8:56 pm)
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