From 232b14328050a4639130b0dec185f43968e72035 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 18 Oct 2007 03:04:44 -0700 Subject: freezer: do not sync filesystems from freeze_processes The syncing of filesystems from within the freezer is generally not needed. Also, if there's an ext3 filesystem loopback-mounted from a FUSE one, the syncing results in writes to it and deadlocks. Similarly, it will deadlock if FUSE implements sync. Change freeze_processes() so that it doesn't execute sys_sync() and make the suspend and hibernation code path sync filesystems independently of the freezer. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Cc: Nigel Cunningham Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/power/main.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'kernel/power/main.c') diff --git a/kernel/power/main.c b/kernel/power/main.c index fb2412e7a0c..3cdf95b1dc9 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -20,6 +20,7 @@ #include #include #include +#include #include "power.h" @@ -230,9 +231,14 @@ static int enter_state(suspend_state_t state) if (!valid_state(state)) return -ENODEV; + if (!mutex_trylock(&pm_mutex)) return -EBUSY; + printk("Syncing filesystems ... "); + sys_sync(); + printk("done.\n"); + pr_debug("PM: Preparing system for %s sleep\n", pm_states[state]); if ((error = suspend_prepare())) goto Unlock; -- cgit v1.2.3