* [PATCH] mac80211: mesh: only switch path when new metric is at least 10% better
@ 2019-01-15 23:33 julanhsu
2019-01-17 12:29 ` Julian Calaby
0 siblings, 1 reply; 2+ messages in thread
From: julanhsu @ 2019-01-15 23:33 UTC (permalink / raw)
To: johannes; +Cc: linux-wireless, Julan Hsu
From: Julan Hsu <julanhsu@google.com>
This helps to reduce frequent path switches when multiple path
candidates have the same or very similar path metrics.
Signed-off-by: Julan Hsu <julanhsu@google.com>
---
net/mac80211/mesh_hwmp.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 6950cd0bf594..9ce75ef3e249 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -441,7 +441,10 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
(mpath->flags & MESH_PATH_SN_VALID)) {
if (SN_GT(mpath->sn, orig_sn) ||
(mpath->sn == orig_sn &&
- new_metric >= mpath->metric)) {
+ (rcu_access_pointer(mpath->next_hop) !=
+ sta ?
+ mult_frac(new_metric, 10, 9) :
+ new_metric) >= mpath->metric)) {
process = false;
fresh_info = false;
}
@@ -506,8 +509,10 @@ static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
if (mpath) {
spin_lock_bh(&mpath->state_lock);
if ((mpath->flags & MESH_PATH_FIXED) ||
- ((mpath->flags & MESH_PATH_ACTIVE) &&
- (last_hop_metric > mpath->metric)))
+ ((mpath->flags & MESH_PATH_ACTIVE) &&
+ ((rcu_access_pointer(mpath->next_hop) != sta ?
+ mult_frac(last_hop_metric, 10, 9) :
+ last_hop_metric) > mpath->metric)))
fresh_info = false;
} else {
mpath = mesh_path_add(sdata, ta);
--
2.20.1.97.g81188d93c3-goog
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] mac80211: mesh: only switch path when new metric is at least 10% better
2019-01-15 23:33 [PATCH] mac80211: mesh: only switch path when new metric is at least 10% better julanhsu
@ 2019-01-17 12:29 ` Julian Calaby
0 siblings, 0 replies; 2+ messages in thread
From: Julian Calaby @ 2019-01-17 12:29 UTC (permalink / raw)
To: julanhsu; +Cc: Johannes Berg, linux-wireless
Hi Julan,
On Thu, Jan 17, 2019 at 4:06 AM <julanhsu@google.com> wrote:
>
> From: Julan Hsu <julanhsu@google.com>
>
> This helps to reduce frequent path switches when multiple path
> candidates have the same or very similar path metrics.
Should this be configurable?
Thanks,
--
Julian Calaby
Email: julian.calaby@gmail.com
Profile: http://www.google.com/profiles/julian.calaby/
^ permalink raw reply [flat|nested] 2+ messages in thread
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