ccfeeef59d
Backport the patches for this issue: https://bugzilla.redhat.com/show_bug.cgi?id=1819868 We met such an issue: When testing a large number of pods (> 230), occasionally observed a number of issues related to systemd process: systemd ran continually 90-100% cpu usage systemd memory usage started increasing rapidly (20GB/hour) systemctl commands would always timeout (Failed to get properties: Connection timed out) sm services failed and can't recover: open-ldap, registry-token-server, docker-distribution, etcd new pods can't start, and got stuck in state ContainerCreating Those patches work to prevent excessive /proc/1/mountinfo reparsing. It has been verified that those patches can improve this performance greatly. 16 commits are listed in sequence (from [1] to [16]) at below link for the issue: https://github.com/systemd-rhel/rhel-8/pull/154/commits [16](10)core: prevent excessive /proc/self/mountinfo parsing [15][Dropped-6]test: add ratelimiting test [14](9)sd-event: add ability to ratelimit event sources [13](8)sd-event: increase n_enabled_child_sources just once [12](7)sd-event: update state at the end in event_source_enable [11](6)sd-event: remove earliest_index/latest_index into common part of event source objects [10][Dropped-5]sd-event: follow coding style with naming return parameter [9] [Dropped-4]sd-event: ref event loop while in sd_event_prepare() ot sd_event_run() [8] (5)sd-event: refuse running default event loops in any other thread than the one they are default for [7] [Dropped-3]sd-event: let's suffix last_run/last_log with "_usec" [6] [Dropped-2]sd-event: fix delays assert brain-o (#17790) [5] (4)sd-event: split out code to add/remove timer event sources to earliest/latest prioq [4] (3)sd-event: split clock data allocation out of sd_event_add_time() [3] [Dropped-1]sd-event: mention that two debug logged events are ignored [2] (2)sd-event: split out enable and disable codepaths from sd_event_source_set_enabled() [1] (1)sd-event: split out helper functions for reshuffling prioqs I ported 10 of them back (from (1) to (10)) to fix this issue and dropped the other 6 (from [Dropped-1] to [Dropped-6]) for those reasons: [Dropped-1]Only changes error log. [Dropped-2]Fixes a bug introduced in a commit which doesn't exist in this version. [Dropped-3]Only changes vars' names and there is no functional change. [Dropped-4]More commits are needed for merging it, while I don't see any help on adding the rate-limiting ability. [Dropped-5]Change coding style for a function which isn't really used by anyone. [Dropped-6]Add test cases. Closes-Bug: #1924686 Signed-off-by: Li Zhou <li.zhou@windriver.com> Change-Id: Ia4c8f162cb1a47b40d1b26cf4d604976b97e92d6
51 lines
1.7 KiB
Diff
51 lines
1.7 KiB
Diff
From 76969d09522ca2ab58bc157eb9ce357af5677f3a Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 25 May 2018 17:06:39 +0200
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Subject: [PATCH 04/20] sd-event: drop pending events when we turn off/on an
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event source
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[commit ac989a783a31df95e6c0ce2a90a8d2e1abe73592 from
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https://github.com/systemd-rhel/rhel-8/]
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Signed-off-by: Li Zhou <li.zhou@windriver.com>
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---
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src/libsystemd/sd-event/sd-event.c | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
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index eb3182f..6e93059 100644
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--- a/src/libsystemd/sd-event/sd-event.c
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+++ b/src/libsystemd/sd-event/sd-event.c
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@@ -1623,6 +1623,13 @@ _public_ int sd_event_source_set_enabled(sd_event_source *s, int m) {
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if (m == SD_EVENT_OFF) {
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+ /* Unset the pending flag when this event source is disabled */
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+ if (!IN_SET(s->type, SOURCE_DEFER, SOURCE_EXIT)) {
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+ r = source_set_pending(s, false);
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+ if (r < 0)
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+ return r;
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+ }
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+
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switch (s->type) {
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case SOURCE_IO:
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@@ -1672,6 +1679,14 @@ _public_ int sd_event_source_set_enabled(sd_event_source *s, int m) {
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}
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} else {
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+
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+ /* Unset the pending flag when this event source is enabled */
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+ if (s->enabled == SD_EVENT_OFF && !IN_SET(s->type, SOURCE_DEFER, SOURCE_EXIT)) {
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+ r = source_set_pending(s, false);
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+ if (r < 0)
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+ return r;
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+ }
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+
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switch (s->type) {
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case SOURCE_IO:
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--
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2.17.1
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