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authorLinus Torvalds <torvalds@linux-foundation.org>2009-10-11 11:23:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-10-11 11:23:13 -0700
commit474a503d4bf77ae0cbe484dd0842a2648c0b1c28 (patch)
tree70e3e4023209e741546491a58622bd45fb13e308 /fs/btrfs/tree-log.c
parentd43c36dc6b357fa1806800f18aa30123c747a6d1 (diff)
parentac6889cbb254be1ffea376bea4a96ce9be0e0ed0 (diff)
downloadlinux-474a503d4bf77ae0cbe484dd0842a2648c0b1c28.tar.bz2
Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: fix file clone ioctl for bookend extents Btrfs: fix uninit compiler warning in cow_file_range_nocow Btrfs: constify dentry_operations Btrfs: optimize back reference update during btrfs_drop_snapshot Btrfs: remove negative dentry when deleting subvolumne Btrfs: optimize fsync for the single writer case Btrfs: async delalloc flushing under space pressure Btrfs: release delalloc reservations on extent item insertion Btrfs: delay clearing EXTENT_DELALLOC for compressed extents Btrfs: cleanup extent_clear_unlock_delalloc flags Btrfs: fix possible softlockup in the allocator Btrfs: fix deadlock on async thread startup
Diffstat (limited to 'fs/btrfs/tree-log.c')
-rw-r--r--fs/btrfs/tree-log.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 7827841b55cb..4edfdc2acc5f 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -137,11 +137,20 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
mutex_lock(&root->log_mutex);
if (root->log_root) {
+ if (!root->log_start_pid) {
+ root->log_start_pid = current->pid;
+ root->log_multiple_pids = false;
+ } else if (root->log_start_pid != current->pid) {
+ root->log_multiple_pids = true;
+ }
+
root->log_batch++;
atomic_inc(&root->log_writers);
mutex_unlock(&root->log_mutex);
return 0;
}
+ root->log_multiple_pids = false;
+ root->log_start_pid = current->pid;
mutex_lock(&root->fs_info->tree_log_mutex);
if (!root->fs_info->log_root_tree) {
ret = btrfs_init_log_root_tree(trans, root->fs_info);
@@ -1985,7 +1994,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
if (atomic_read(&root->log_commit[(index1 + 1) % 2]))
wait_log_commit(trans, root, root->log_transid - 1);
- while (1) {
+ while (root->log_multiple_pids) {
unsigned long batch = root->log_batch;
mutex_unlock(&root->log_mutex);
schedule_timeout_uninterruptible(1);
@@ -2011,6 +2020,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
root->log_batch = 0;
root->log_transid++;
log->log_transid = root->log_transid;
+ root->log_start_pid = 0;
smp_mb();
/*
* log tree has been flushed to disk, new modifications of