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From b550b671bace6d979a0763a837ce97ddf72e8fc8 Mon Sep 17 00:00:00 2001
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Message-Id: <b550b671bace6d979a0763a837ce97ddf72e8fc8@dist-git>
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From: Martin Kletzander <mkletzan@redhat.com>
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Date: Fri, 28 Jan 2022 20:33:12 +0100
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Subject: [PATCH] RHEL: Remove
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https://bugzilla.redhat.com/show_bug.cgi?id=2045879
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This is to accommodate for RHEL 8 downstream glib being fixed with a backport in
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version 2.56.4-12 (Bug 1948988). Another reason for that is that our workaround
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does not play nice with a fixed glib, leading to libvirt not properly
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dereferencing the monitor socket, eventually leading to EMFILE: Too many open
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files.
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RHEL-only
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Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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Reviewed-by: Peter Krempa <pkrempa@redhat.com>
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---
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src/util/glibcompat.c | 46 ++++++++-----------------------------------
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1 file changed, 8 insertions(+), 38 deletions(-)
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diff --git a/src/util/glibcompat.c b/src/util/glibcompat.c
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index eb6dcc0111..bf890f10d2 100644
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--- a/src/util/glibcompat.c
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+++ b/src/util/glibcompat.c
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@@ -212,51 +212,21 @@ vir_g_strdup_vprintf(const char *msg, va_list args)
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return ret;
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}
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-
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/*
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- * If the last reference to a GSource is released in a non-main
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- * thread we're exposed to a race condition that causes a
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- * crash:
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- *
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- * https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1358
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+ * This is a leftover of a hack that works around glib older than 2.64.0, but
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+ * the fix in glib as backported in RHEL-8 to glib2-2.56.4-12 in BZ 1948988:
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*
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- * Thus we're using an idle func to release our ref...
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+ * https://bugzilla.redhat.com/show_bug.cgi?id=1948988
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*
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- * ...but this imposes a significant performance penalty on
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- * I/O intensive workloads which are sensitive to the iterations
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- * of the event loop, so avoid the workaround if we know we have
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- * new enough glib.
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+ * and our workaround coupled with that glib fix started causing leaks, which
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+ * surfaced with us not unreferencing the qemu monitor socket in BZ 2045879:
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*
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- * The function below is used from a header file definition.
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+ * https://bugzilla.redhat.com/show_bug.cgi?id=2045879
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*
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- * Drop when min glib >= 2.64.0
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+ * Keeping this wrapper makes it easier to follow with other backports without
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+ * conflicts in callers due to the function name change.
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*/
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-#if GLIB_CHECK_VERSION(2, 64, 0)
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void vir_g_source_unref(GSource *src, GMainContext *ctx G_GNUC_UNUSED)
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{
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g_source_unref(src);
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}
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-#else
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-
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-static gboolean
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-virEventGLibSourceUnrefIdle(gpointer data)
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-{
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- GSource *src = data;
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-
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- g_source_unref(src);
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-
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- return FALSE;
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-}
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-
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-void vir_g_source_unref(GSource *src, GMainContext *ctx)
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-{
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- GSource *idle = g_idle_source_new();
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-
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- g_source_set_callback(idle, virEventGLibSourceUnrefIdle, src, NULL);
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-
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- g_source_attach(idle, ctx);
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-
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- g_source_unref(idle);
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-}
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-
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-#endif
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--
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2.35.1
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