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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:45:48 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:45:48 -0700 |
| commit | 95dfec6ae1cb8c03406aac612a5642cbddb676b3 (patch) | |
| tree | 978de715f45de94a8e79eb08a08ca5fb9dfd9dea /net/ipv4/tcp_vegas.c | |
| parent | ae3a0064e6d69068b1c9fd075095da062430bda9 (diff) | |
| parent | 159131149c2f56c1da5ae5e23ab9d5acef4916d1 (diff) | |
| download | linux-3.10-95dfec6ae1cb8c03406aac612a5642cbddb676b3.tar.gz linux-3.10-95dfec6ae1cb8c03406aac612a5642cbddb676b3.tar.bz2 linux-3.10-95dfec6ae1cb8c03406aac612a5642cbddb676b3.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (53 commits)
tcp: Overflow bug in Vegas
[IPv4] UFO: prevent generation of chained skb destined to UFO device
iwlwifi: move the selects to the tristate drivers
ipv4: annotate a few functions __init in ipconfig.c
atm: ambassador: vcc_sf semaphore to mutex
MAINTAINERS: The socketcan-core list is subscribers-only.
netfilter: nf_conntrack: padding breaks conntrack hash on ARM
ipv4: Update MTU to all related cache entries in ip_rt_frag_needed()
sch_sfq: use del_timer_sync() in sfq_destroy()
net: Add compat support for getsockopt (MCAST_MSFILTER)
net: Several cleanups for the setsockopt compat support.
ipvs: fix oops in backup for fwmark conn templates
bridge: kernel panic when unloading bridge module
bridge: fix error handling in br_add_if()
netfilter: {nfnetlink,ip,ip6}_queue: fix skb_over_panic when enlarging packets
netfilter: x_tables: fix net namespace leak when reading /proc/net/xxx_tables_names
netfilter: xt_TCPOPTSTRIP: signed tcphoff for ipv6_skip_exthdr() retval
tcp: Limit cwnd growth when deferring for GSO
tcp: Allow send-limited cwnd to grow up to max_burst when gso disabled
[netdrvr] gianfar: Determine TBIPA value dynamically
...
Diffstat (limited to 'net/ipv4/tcp_vegas.c')
| -rw-r--r-- | net/ipv4/tcp_vegas.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c index be24d6ee34b..0e1a8c91f78 100644 --- a/net/ipv4/tcp_vegas.c +++ b/net/ipv4/tcp_vegas.c @@ -229,7 +229,8 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, u32 in_flight) */ tcp_reno_cong_avoid(sk, ack, in_flight); } else { - u32 rtt, target_cwnd, diff; + u32 rtt, diff; + u64 target_cwnd; /* We have enough RTT samples, so, using the Vegas * algorithm, we determine if we should increase or @@ -252,8 +253,9 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, u32 in_flight) * We keep it as a fixed point number with * V_PARAM_SHIFT bits to the right of the binary point. */ - target_cwnd = ((old_wnd * vegas->baseRTT) - << V_PARAM_SHIFT) / rtt; + target_cwnd = ((u64)old_wnd * vegas->baseRTT); + target_cwnd <<= V_PARAM_SHIFT; + do_div(target_cwnd, rtt); /* Calculate the difference between the window we had, * and the window we would like to have. This quantity @@ -279,7 +281,7 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, u32 in_flight) * utilization. */ tp->snd_cwnd = min(tp->snd_cwnd, - (target_cwnd >> + ((u32)target_cwnd >> V_PARAM_SHIFT)+1); } else if (tp->snd_cwnd <= tp->snd_ssthresh) { |