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| author | Roman Arutyunyan <arut@nginx.com> | 2025-01-06 10:19:56 +0400 |
|---|---|---|
| committer | Roman Arutyunyan <arutyunyan.roman@gmail.com> | 2025-04-15 19:01:36 +0400 |
| commit | a40cc700238796d6668a461e121f6ffee5066394 (patch) | |
| tree | 8e40f75b586cdb4ab02c1f72fd1c1157dff590e1 | |
| parent | 6bf13e9d57bbc664ac055cdb58c738b09a0f0189 (diff) | |
| download | nginx-a40cc700238796d6668a461e121f6ffee5066394.tar.gz nginx-a40cc700238796d6668a461e121f6ffee5066394.zip | |
QUIC: ignore congestion control when sending MTU probes.
If connection is network-limited, MTU probes have little chance of being
sent since congestion window is almost always full. As a result, PMTUD
may not be able to reach the real MTU and the connection may operate with
a reduced MTU. The solution is to ignore the congestion window. This may
lead to a temporary increase in in-flight count beyond congestion window.
| -rw-r--r-- | src/event/quic/ngx_event_quic_migration.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/event/quic/ngx_event_quic_migration.c b/src/event/quic/ngx_event_quic_migration.c index 463eeb503..1d914ffd8 100644 --- a/src/event/quic/ngx_event_quic_migration.c +++ b/src/event/quic/ngx_event_quic_migration.c @@ -924,6 +924,7 @@ ngx_quic_send_path_mtu_probe(ngx_connection_t *c, ngx_quic_path_t *path) frame->level = ssl_encryption_application; frame->type = NGX_QUIC_FT_PING; frame->ignore_loss = 1; + frame->ignore_congestion = 1; qc = ngx_quic_get_connection(c); ctx = ngx_quic_get_send_ctx(qc, ssl_encryption_application); |