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-rw-r--r--fs/sync.c31
1 files changed, 10 insertions, 21 deletions
diff --git a/fs/sync.c b/fs/sync.c
index 631fd5aece7..be0798cc33d 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -18,35 +18,24 @@
#define VALID_FLAGS (SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE| \
SYNC_FILE_RANGE_WAIT_AFTER)
-/*
- * sync everything. Start out by waking pdflush, because that writes back
- * all queues in parallel.
- */
-static void do_sync(unsigned long wait)
+SYSCALL_DEFINE0(sync)
{
- wakeup_pdflush(0);
- sync_inodes(0); /* All mappings, inodes and their blockdevs */
- vfs_dq_sync(NULL);
- sync_inodes(wait); /* Mappings, inodes and blockdevs, again. */
- sync_supers(); /* Write the superblocks */
- sync_filesystems(0); /* Start syncing the filesystems */
- sync_filesystems(wait); /* Waitingly sync the filesystems */
- sync_blockdevs();
- if (!wait)
- printk("Emergency Sync complete\n");
+ sync_filesystems(0);
+ sync_filesystems(1);
if (unlikely(laptop_mode))
laptop_sync_completion();
-}
-
-SYSCALL_DEFINE0(sync)
-{
- do_sync(1);
return 0;
}
static void do_sync_work(struct work_struct *work)
{
- do_sync(0);
+ /*
+ * Sync twice to reduce the possibility we skipped some inodes / pages
+ * because they were temporarily locked
+ */
+ sync_filesystems(0);
+ sync_filesystems(0);
+ printk("Emergency Sync complete\n");
kfree(work);
}