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Patch to fix tests on i686 and arm32

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2021-03-11 20:45:51 +01:00
parent 0a7c16de28
commit 4fcd500d9b
2 changed files with 124 additions and 0 deletions
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123
0001-Revert-sd-event-make-use-of-epoll_pwait2-for-greater.patch Normal file
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@ -0,0 +1,123 @@
From 3552ac862497bdb5ea73639851bbfd114b795fa2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Thu, 11 Mar 2021 20:41:36 +0100
Subject: [PATCH] Revert "sd-event: make use of epoll_pwait2() for greater time
accuracy"
This reverts commit 798445ab84cff51bde7fcf936f0fb19c37cf858c.
Unfortunately this causes test-event to hang. 32 bit architectures seem
affected: i686 and arm32 in fedora koji. 32 bit build of test-event hangs
reliably under valgrind:
$ PKG_CONFIG_LIBDIR=/usr/lib/pkgconfig meson build-32 -Dc_args=-m32 -Dc_link_args=-m32 -Dcpp_args=-m32 -Dcpp_link_args=-m32 && ninja -C build-32 test-event && valgrind build/test-event
---
src/libsystemd/sd-event/sd-event.c | 73 ++++++------------------------
1 file changed, 14 insertions(+), 59 deletions(-)
diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
index 8ab9d419af..69d9c5e780 100644
--- a/src/libsystemd/sd-event/sd-event.c
+++ b/src/libsystemd/sd-event/sd-event.c
@@ -3781,59 +3781,9 @@ pending:
return r;
}
-static int epoll_wait_usec(
- int fd,
- struct epoll_event *events,
- int maxevents,
- usec_t timeout) {
-
- static bool epoll_pwait2_absent = false;
- int r, msec;
-
- /* A wrapper that uses epoll_pwait2() if available, and falls back to epoll_wait() if not */
-
- if (!epoll_pwait2_absent && timeout != USEC_INFINITY) {
- struct timespec ts;
-
- r = epoll_pwait2(fd,
- events,
- maxevents,
- timespec_store(&ts, timeout),
- NULL);
- if (r >= 0)
- return r;
- if (!ERRNO_IS_NOT_SUPPORTED(r) && !ERRNO_IS_PRIVILEGE(r))
- return -errno; /* Only fallback to old epoll_wait() if the syscall is masked or not
- * supported. */
-
- epoll_pwait2_absent = true;
- }
-
- if (timeout == USEC_INFINITY)
- msec = -1;
- else {
- usec_t k;
-
- k = DIV_ROUND_UP(timeout, USEC_PER_MSEC);
- if (k >= INT_MAX)
- msec = INT_MAX; /* Saturate */
- else
- msec = (int) k;
- }
-
- r = epoll_wait(fd,
- events,
- maxevents,
- msec);
- if (r < 0)
- return -errno;
-
- return r;
-}
-
_public_ int sd_event_wait(sd_event *e, uint64_t timeout) {
size_t n_event_queue, m;
- int r;
+ int r, msec;
assert_return(e, -EINVAL);
assert_return(e = event_resolve(e), -ENOPKG);
@@ -3852,16 +3802,21 @@ _public_ int sd_event_wait(sd_event *e, uint64_t timeout) {
/* If we still have inotify data buffered, then query the other fds, but don't wait on it */
if (e->inotify_data_buffered)
- timeout = 0;
+ msec = 0;
+ else
+ msec = timeout == (uint64_t) -1 ? -1 : (int) DIV_ROUND_UP(timeout, USEC_PER_MSEC);
for (;;) {
- r = epoll_wait_usec(e->epoll_fd, e->event_queue, e->event_queue_allocated, timeout);
- if (r == -EINTR) {
- e->state = SD_EVENT_PENDING;
- return 1;
- }
- if (r < 0)
+ r = epoll_wait(e->epoll_fd, e->event_queue, e->event_queue_allocated, msec);
+ if (r < 0) {
+ if (errno == EINTR) {
+ e->state = SD_EVENT_PENDING;
+ return 1;
+ }
+
+ r = -errno;
goto finish;
+ }
m = (size_t) r;
@@ -3874,7 +3829,7 @@ _public_ int sd_event_wait(sd_event *e, uint64_t timeout) {
if (!GREEDY_REALLOC(e->event_queue, e->event_queue_allocated, e->event_queue_allocated + n_event_queue))
return -ENOMEM;
- timeout = 0;
+ msec = 0;
}
triple_timestamp_get(&e->timestamp);
--
2.30.1

1
systemd.spec
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@ -71,6 +71,7 @@ GIT_DIR=../../src/systemd/.git git diffab -M v233..master@{2017-06-15} -- hwdb/[
%endif
# Backports of patches from upstream (0000–0499)
Patch0001: 0001-Revert-sd-event-make-use-of-epoll_pwait2-for-greater.patch
# Downstream-only patches (5000–9999)
# https://bugzilla.redhat.com/show_bug.cgi?id=1738828