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Date: Wed, 18 May 2011 20:56:33 -0700 From: tsuna <tsunanet@...il.com> To: David Miller <davem@...emloft.net> Cc: kuznet@....inr.ac.ru, pekkas@...core.fi, jmorris@...ei.org, yoshfuji@...ux-ipv6.org, kaber@...sh.net, hagen@...u.net, eric.dumazet@...il.com, alexander.zimmermann@...sys.rwth-aachen.de, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] tcp: Implement a two-level initial RTO as per draft RFC 2988bis-02. On Wed, May 18, 2011 at 7:36 PM, David Miller <davem@...emloft.net> wrote: > From: Benoit Sigoure <tsunanet@...il.com> > Date: Wed, 18 May 2011 19:22:24 -0700 > >> Prior to this patch, Linux would always use 3 seconds (compile-time >> constant) as the initial RTO. Draft RFC 2988bis-02 proposes to tune >> this down to 1 second and, in case of a timeout during the TCP 3WHS, >> revert the RTO back up to 3 seconds when data transmission begins. > > We just had a discussion where it was determined that changes to > these settings are "network specific" and therefore that if it > is appropriate at all (I'm still not convinced) it is only suitable > as a routing metric. Fair enough. I'll take another stab at it and see if I can change this to be on a per network basis. Do I need any patch that's not yet in Linus' tree? I'm referring to this: On Tue, May 17, 2011 at 5:20 AM, Eric Dumazet <eric.dumazet@...il.com> wrote: > Adding many knobs to each clone had a huge cost on previous kernels. > (Think some machines have millions entries in IP route cache), this used > quite a lot of memory. > > With latest David work, we'll consume less ram, because we can now share > settings, instead of copying them on each dst entry. If this has already been merged then it sounds like I should have everything I need..? -- Benoit "tsuna" Sigoure Software Engineer @ www.StumbleUpon.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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