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From 64dbfdfe3ed2fc8f252ce138f6213b529edb2407 Mon Sep 17 00:00:00 2001
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Message-Id: <64dbfdfe3ed2fc8f252ce138f6213b529edb2407@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Wed, 15 Feb 2023 10:48:31 +0100
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Subject: [PATCH] rpc: Don't warn about "max_client_requests" in
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single-threaded daemons
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The warning about max_client_requests is hit inside virtlogd every time
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a VM starts which spams the logs.
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Emit the warning only when the client request limit is not 1 and add a
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warning into the daemon config to not configure it too low instead.
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Fixes: 031878c2364
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2145188
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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(cherry picked from commit b3f8e072fe08a6beaf3ec3d27e02efee4358b2ca)
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---
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src/remote/libvirtd.conf.in | 1 +
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src/rpc/virnetserverclient.c | 3 ++-
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2 files changed, 3 insertions(+), 1 deletion(-)
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diff --git a/src/remote/libvirtd.conf.in b/src/remote/libvirtd.conf.in
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index 80a98b1529..32a680317a 100644
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--- a/src/remote/libvirtd.conf.in
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+++ b/src/remote/libvirtd.conf.in
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@@ -374,6 +374,7 @@
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# connection. To avoid one client monopolizing the server
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# this should be a small fraction of the global max_workers
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# parameter.
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+# Setting this too low may cause keepalive timeouts.
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#max_client_requests = 5
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# Same processing controls, but this time for the admin interface.
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diff --git a/src/rpc/virnetserverclient.c b/src/rpc/virnetserverclient.c
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index b5c764b1b0..bdb3552c5d 100644
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--- a/src/rpc/virnetserverclient.c
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+++ b/src/rpc/virnetserverclient.c
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@@ -1261,7 +1261,8 @@ static virNetMessage *virNetServerClientDispatchRead(virNetServerClient *client)
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client->rx->bufferLength = VIR_NET_MESSAGE_LEN_MAX;
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client->rx->buffer = g_new0(char, client->rx->bufferLength);
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client->nrequests++;
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- } else if (!client->nrequests_warning) {
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+ } else if (!client->nrequests_warning &&
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+ client->nrequests_max > 1) {
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client->nrequests_warning = true;
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VIR_WARN("Client hit max requests limit %zd. This may result "
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"in keep-alive timeouts. Consider tuning the "
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--
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2.39.1
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