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From 8c5d6c7bdc1cd5557503764ff8187d39bed3cbe1 Mon Sep 17 00:00:00 2001
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From: Fam Zheng <famz@redhat.com>
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Date: Fri, 17 Aug 2018 03:08:35 +0200
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Subject: [PATCH 4/5] aio-posix: Don't count ctx->notifier as progress when
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polling
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RH-Author: Fam Zheng <famz@redhat.com>
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Message-id: <20180817030836.20581-2-famz@redhat.com>
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Patchwork-id: 81861
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O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH 1/2] aio-posix: Don't count ctx->notifier as progress when polling
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Bugzilla: 1562750
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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The same logic exists in fd polling. This change is especially important
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to avoid busy loop once we limit aio_notify_accept() to blocking
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aio_poll().
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Message-Id: <20180809132259.18402-2-famz@redhat.com>
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Signed-off-by: Fam Zheng <famz@redhat.com>
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(cherry picked from commit 70232b5253a3c4e03ed1ac47ef9246a8ac66c6fa)
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Signed-off-by: Fam Zheng <famz@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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util/aio-posix.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/util/aio-posix.c b/util/aio-posix.c
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index d8f0cb4..f650c7c 100644
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--- a/util/aio-posix.c
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+++ b/util/aio-posix.c
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@@ -494,7 +494,8 @@ static bool run_poll_handlers_once(AioContext *ctx)
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QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) {
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if (!node->deleted && node->io_poll &&
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aio_node_check(ctx, node->is_external) &&
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- node->io_poll(node->opaque)) {
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+ node->io_poll(node->opaque) &&
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+ node->opaque != &ctx->notifier) {
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progress = true;
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}
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--
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1.8.3.1
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