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Merge pull request #3709 from poettering/journald-shutdown-sync

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journald-related shutdown fixes for slow I/O
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2016-07-14 21:47:49 -04:00 committed by GitHub
commit 20f873deb2
2 changed files with 14 additions and 11 deletions
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5
src/core/killall.c
View File

@ -23,6 +23,7 @@
#include <unistd.h>
#include "alloc-util.h"
#include "def.h"
#include "fd-util.h"
#include "formats-util.h"
#include "killall.h"
@ -33,8 +34,6 @@
#include "terminal-util.h"
#include "util.h"
#define TIMEOUT_USEC (10 * USEC_PER_SEC)
static bool ignore_proc(pid_t pid, bool warn_rootfs) {
_cleanup_fclose_ FILE *f = NULL;
char c;
@ -99,7 +98,7 @@ static void wait_for_children(Set *pids, sigset_t *mask) {
if (set_isempty(pids))
return;
until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
until = now(CLOCK_MONOTONIC) + DEFAULT_TIMEOUT_USEC;
for (;;) {
struct timespec ts;
int k;

20
src/core/shutdown.c
View File

@ -157,7 +157,6 @@ static int switch_root_initramfs(void) {
return switch_root("/run/initramfs", "/oldroot", false, MS_BIND);
}
int main(int argc, char *argv[]) {
bool need_umount, need_swapoff, need_loop_detach, need_dm_detach;
bool in_container, use_watchdog = false;
@ -203,20 +202,25 @@ int main(int argc, char *argv[]) {
}
(void) cg_get_root_path(&cgroup);
in_container = detect_container() > 0;
use_watchdog = !!getenv("WATCHDOG_USEC");
/* lock us into memory */
/* Lock us into memory */
mlockall(MCL_CURRENT|MCL_FUTURE);
/* Synchronize everything that is not written to disk yet at this point already. This is a good idea so that
* slow IO is processed here already and the final process killing spree is not impacted by processes
* desperately trying to sync IO to disk within their timeout. */
if (!in_container)
sync();
log_info("Sending SIGTERM to remaining processes...");
broadcast_signal(SIGTERM, true, true);
log_info("Sending SIGKILL to remaining processes...");
broadcast_signal(SIGKILL, true, false);
in_container = detect_container() > 0;
need_umount = !in_container;
need_swapoff = !in_container;
need_loop_detach = !in_container;
@ -345,10 +349,10 @@ int main(int argc, char *argv[]) {
need_loop_detach ? " loop devices," : "",
need_dm_detach ? " DM devices," : "");
/* The kernel will automaticall flush ATA disks and suchlike
* on reboot(), but the file systems need to be synce'd
* explicitly in advance. So let's do this here, but not
* needlessly slow down containers. */
/* The kernel will automatically flush ATA disks and suchlike on reboot(), but the file systems need to be
* sync'ed explicitly in advance. So let's do this here, but not needlessly slow down containers. Note that we
* sync'ed things already once above, but we did some more work since then which might have caused IO, hence
* let's doit once more. */
if (!in_container)
sync();