From: Daniel Borkmann <dborkman@redhat.com> To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-sctp@vger.kernel.org Subject: [PATCH v3 net-next 3/5] net: sctp: migrate most recently used transport to ktime Date: Wed, 11 Jun 2014 18:19:30 +0200 [thread overview] Message-ID: <1402503572-32237-4-git-send-email-dborkman@redhat.com> (raw) In-Reply-To: <1402503572-32237-1-git-send-email-dborkman@redhat.com> Be more precise in transport path selection and use ktime helpers instead of jiffies to compare and pick the better primary and secondary recently used transports. This also avoids any side-effects during a possible roll-over, and could lead to better path decision-making. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> --- include/net/sctp/structs.h | 6 +++--- net/sctp/associola.c | 8 +++++--- net/sctp/endpointola.c | 2 +- net/sctp/transport.c | 2 +- 4 files changed, 10 insertions(+), 8 deletions(-) diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 0dfcc92..f38588b 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -838,10 +838,10 @@ struct sctp_transport { unsigned long sackdelay; __u32 sackfreq; - /* When was the last time (in jiffies) that we heard from this - * transport? We use this to pick new active and retran paths. + /* When was the last time that we heard from this transport? We use + * this to pick new active and retran paths. */ - unsigned long last_time_heard; + ktime_t last_time_heard; /* Last time(in jiffies) when cwnd is reduced due to the congestion * indication based on ECNE chunk. diff --git a/net/sctp/associola.c b/net/sctp/associola.c index 9f1cc6f..620c99e 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -1036,7 +1036,7 @@ static void sctp_assoc_bh_rcv(struct work_struct *work) } if (chunk->transport) - chunk->transport->last_time_heard = jiffies; + chunk->transport->last_time_heard = ktime_get(); /* Run through the state machine. */ error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype, @@ -1283,11 +1283,13 @@ static void sctp_select_active_and_retran_path(struct sctp_association *asoc) trans->state == SCTP_PF) continue; if (trans_pri == NULL || - trans->last_time_heard > trans_pri->last_time_heard) { + ktime_after(trans->last_time_heard, + trans_pri->last_time_heard)) { trans_sec = trans_pri; trans_pri = trans; } else if (trans_sec == NULL || - trans->last_time_heard > trans_sec->last_time_heard) { + ktime_after(trans->last_time_heard, + trans_sec->last_time_heard)) { trans_sec = trans; } } diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c index 3d9f429..9da76ba 100644 --- a/net/sctp/endpointola.c +++ b/net/sctp/endpointola.c @@ -481,7 +481,7 @@ normal: } if (chunk->transport) - chunk->transport->last_time_heard = jiffies; + chunk->transport->last_time_heard = ktime_get(); error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype, state, ep, asoc, chunk, GFP_ATOMIC); diff --git a/net/sctp/transport.c b/net/sctp/transport.c index 1d348d1..7dd672f 100644 --- a/net/sctp/transport.c +++ b/net/sctp/transport.c @@ -72,7 +72,7 @@ static struct sctp_transport *sctp_transport_init(struct net *net, */ peer->rto = msecs_to_jiffies(net->sctp.rto_initial); - peer->last_time_heard = jiffies; + peer->last_time_heard = ktime_get(); peer->last_time_ecne_reduced = jiffies; peer->param_flags = SPP_HB_DISABLE | -- 1.7.11.7
WARNING: multiple messages have this Message-ID (diff)
From: Daniel Borkmann <dborkman@redhat.com> To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-sctp@vger.kernel.org Subject: [PATCH v3 net-next 3/5] net: sctp: migrate most recently used transport to ktime Date: Wed, 11 Jun 2014 16:19:30 +0000 [thread overview] Message-ID: <1402503572-32237-4-git-send-email-dborkman@redhat.com> (raw) In-Reply-To: <1402503572-32237-1-git-send-email-dborkman@redhat.com> Be more precise in transport path selection and use ktime helpers instead of jiffies to compare and pick the better primary and secondary recently used transports. This also avoids any side-effects during a possible roll-over, and could lead to better path decision-making. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> --- include/net/sctp/structs.h | 6 +++--- net/sctp/associola.c | 8 +++++--- net/sctp/endpointola.c | 2 +- net/sctp/transport.c | 2 +- 4 files changed, 10 insertions(+), 8 deletions(-) diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 0dfcc92..f38588b 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -838,10 +838,10 @@ struct sctp_transport { unsigned long sackdelay; __u32 sackfreq; - /* When was the last time (in jiffies) that we heard from this - * transport? We use this to pick new active and retran paths. + /* When was the last time that we heard from this transport? We use + * this to pick new active and retran paths. */ - unsigned long last_time_heard; + ktime_t last_time_heard; /* Last time(in jiffies) when cwnd is reduced due to the congestion * indication based on ECNE chunk. diff --git a/net/sctp/associola.c b/net/sctp/associola.c index 9f1cc6f..620c99e 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -1036,7 +1036,7 @@ static void sctp_assoc_bh_rcv(struct work_struct *work) } if (chunk->transport) - chunk->transport->last_time_heard = jiffies; + chunk->transport->last_time_heard = ktime_get(); /* Run through the state machine. */ error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype, @@ -1283,11 +1283,13 @@ static void sctp_select_active_and_retran_path(struct sctp_association *asoc) trans->state = SCTP_PF) continue; if (trans_pri = NULL || - trans->last_time_heard > trans_pri->last_time_heard) { + ktime_after(trans->last_time_heard, + trans_pri->last_time_heard)) { trans_sec = trans_pri; trans_pri = trans; } else if (trans_sec = NULL || - trans->last_time_heard > trans_sec->last_time_heard) { + ktime_after(trans->last_time_heard, + trans_sec->last_time_heard)) { trans_sec = trans; } } diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c index 3d9f429..9da76ba 100644 --- a/net/sctp/endpointola.c +++ b/net/sctp/endpointola.c @@ -481,7 +481,7 @@ normal: } if (chunk->transport) - chunk->transport->last_time_heard = jiffies; + chunk->transport->last_time_heard = ktime_get(); error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype, state, ep, asoc, chunk, GFP_ATOMIC); diff --git a/net/sctp/transport.c b/net/sctp/transport.c index 1d348d1..7dd672f 100644 --- a/net/sctp/transport.c +++ b/net/sctp/transport.c @@ -72,7 +72,7 @@ static struct sctp_transport *sctp_transport_init(struct net *net, */ peer->rto = msecs_to_jiffies(net->sctp.rto_initial); - peer->last_time_heard = jiffies; + peer->last_time_heard = ktime_get(); peer->last_time_ecne_reduced = jiffies; peer->param_flags = SPP_HB_DISABLE | -- 1.7.11.7
next prev parent reply other threads:[~2014-06-11 16:19 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-06-11 16:19 [PATCH v3 net-next 0/5] SCTP update Daniel Borkmann 2014-06-11 16:19 ` Daniel Borkmann 2014-06-11 16:19 ` [PATCH v3 net-next 1/5] ktime: add ktime_after and ktime_before helper Daniel Borkmann 2014-06-11 16:19 ` Daniel Borkmann 2014-06-11 16:19 ` [PATCH v3 net-next 2/5] net: sctp: refactor active path selection Daniel Borkmann 2014-06-11 16:19 ` Daniel Borkmann 2014-06-11 16:19 ` Daniel Borkmann [this message] 2014-06-11 16:19 ` [PATCH v3 net-next 3/5] net: sctp: migrate most recently used transport to ktime Daniel Borkmann 2014-06-11 16:19 ` [PATCH v3 net-next 4/5] net: sctp: improve sctp_select_active_and_retran_path selection Daniel Borkmann 2014-06-11 16:19 ` Daniel Borkmann 2014-06-11 16:19 ` [PATCH v3 net-next 5/5] net: sctp: fix incorrect type in gfp initializer Daniel Borkmann 2014-06-11 16:19 ` Daniel Borkmann 2014-06-11 16:24 ` [PATCH v3 net-next 0/5] SCTP update Vlad Yasevich 2014-06-11 16:24 ` Vlad Yasevich 2014-06-11 19:23 ` David Miller 2014-06-11 19:23 ` David Miller
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