From 0049f05a8bb82c3e084bacc5945596761d706c55 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Fri, 16 Nov 2012 01:30:29 +0100 Subject: [PATCH] shutdown: readd explicit sync() when shutting down As it turns out reboot() doesn't actually imply a file system sync, but only a disk sync. Accordingly, readd explicit sync() invocations immediately before we invoke reboot(). This is much less dramatic than it might sounds as we umount all disks/read-only remount them anyway before going down. --- src/core/service.c | 1 + src/core/shutdown.c | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/src/core/service.c b/src/core/service.c index cf08485..df72aba 100644 --- a/src/core/service.c +++ b/src/core/service.c @@ -2485,6 +2485,7 @@ static int service_start_limit_test(Service *s) { case SERVICE_START_LIMIT_REBOOT_IMMEDIATE: log_warning("%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id); + sync(); reboot(RB_AUTOBOOT); break; diff --git a/src/core/shutdown.c b/src/core/shutdown.c index cc8c57b..b59aef1 100644 --- a/src/core/shutdown.c +++ b/src/core/shutdown.c @@ -273,6 +273,13 @@ int main(int argc, char *argv[]) { } } + /* 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. */ + if (!in_container) + sync(); + if (cmd == LINUX_REBOOT_CMD_KEXEC) { if (!in_container) { -- 1.7.12.1