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From e8922fefa62184cdd0ff808f4e52de74e8d9bbe5 Mon Sep 17 00:00:00 2001
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From: Dumitru Ceara <dceara@redhat.com>
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Date: Wed, 25 Mar 2020 21:15:23 +0100
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Subject: [PATCH 1/4] Revert "ovsdb-idl: Avoid sending redundant conditional
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monitoring updates"
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This reverts commit 5351980b047f4dd40be7a59a1e4b910df21eca0a.
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If the ovsdb-server reply to "monitor_cond_since" requests has
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"found" == false then ovsdb_idl_db_parse_monitor_reply() calls
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ovsdb_idl_db_clear() which iterates through all tables and
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unconditionally sets table->cond_changed to false.
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However, if the client had already set a new condition for some of the
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tables, this new condition request will never be sent to ovsdb-server
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until the condition is reset to a different value. This is due to the
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check in ovsdb_idl_db_set_condition().
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One way to replicate the issue is described in the bugzilla reporting
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the bug, when ovn-controller is configured to use "ovn-monitor-all":
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https://bugzilla.redhat.com/show_bug.cgi?id=1808125#c6
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Commit 5351980b047f tried to optimize sending redundant conditional
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monitoring updates but the chances that this scenario happens with the
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latest code is quite low since commit 403a6a0cb003 ("ovsdb-idl: Fast
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resync from server when connection reset.") changed the behavior of
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ovsdb_idl_db_parse_monitor_reply() to avoid calling ovsdb_idl_db_clear()
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in most cases.
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Reported-by: Dan Williams <dcbw@redhat.com>
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Reported-at: https://bugzilla.redhat.com/1808125
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CC: Andy Zhou <azhou@ovn.org>
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Fixes: 5351980b047f ("ovsdb-idl: Avoid sending redundant conditional monitoring updates")
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Acked-by: Han Zhou <hzhou@ovn.org>
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Acked-by: Ilya Maximets <i.maximets@ovn.org>
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Signed-off-by: Dumitru Ceara <dceara@redhat.com>
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Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
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(cherry picked from upstream OVS commit 2b7e536fa5e20be10e620b959e05557f88862d2c)
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Change-Id: Iaa24bc949d648e8fa29abea1fe8fb5878ba45864
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---
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openvswitch-2.13.0/lib/ovsdb-idl.c | 2 --
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1 file changed, 2 deletions(-)
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diff --git a/openvswitch-2.13.0/lib/ovsdb-idl.c b/openvswitch-2.13.0/lib/ovsdb-idl.c
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index 190143f36..1535ad7b5 100644
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--- a/openvswitch-2.13.0/lib/ovsdb-idl.c
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+++ b/openvswitch-2.13.0/lib/ovsdb-idl.c
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@@ -610,7 +610,6 @@ ovsdb_idl_db_clear(struct ovsdb_idl_db *db)
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struct ovsdb_idl_table *table = &db->tables[i];
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struct ovsdb_idl_row *row, *next_row;
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- table->cond_changed = false;
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if (hmap_is_empty(&table->rows)) {
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continue;
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}
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@@ -634,7 +633,6 @@ ovsdb_idl_db_clear(struct ovsdb_idl_db *db)
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}
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ovsdb_idl_row_destroy_postprocess(db);
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- db->cond_changed = false;
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db->cond_seqno = 0;
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ovsdb_idl_db_track_clear(db);
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--
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2.26.2
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