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authorMiao Xie <miaox@cn.fujitsu.com>2014-02-20 14:08:59 +0400
committerJosef Bacik <jbacik@fb.com>2014-03-10 23:16:43 +0400
commitd1433debe7f4346cf9fc0dafc71c3137d2a97bc4 (patch)
tree1cc86b5bc4a40a9ffc568ae0dbfd78bae4360c54 /fs/btrfs/tree-log.h
parent8b050d350c7846462a21e9e054c9154ede9b43cf (diff)
downloadlinux-d1433debe7f4346cf9fc0dafc71c3137d2a97bc4.tar.xz
Btrfs: just wait or commit our own log sub-transaction
We might commit the log sub-transaction which didn't contain the metadata we logged. It was because we didn't record the log transid and just select the current log sub-transaction to commit, but the right one might be committed by the other task already. Actually, we needn't do anything and it is safe that we go back directly in this case. This patch improves the log sync by the above idea. We record the transid of the log sub-transaction in which we log the metadata, and the transid of the log sub-transaction we have committed. If the committed transid is >= the transid we record when logging the metadata, we just go back. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fb.com>
Diffstat (limited to 'fs/btrfs/tree-log.h')
-rw-r--r--fs/btrfs/tree-log.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.h b/fs/btrfs/tree-log.h
index 59c1edb31d19..91b145fce333 100644
--- a/fs/btrfs/tree-log.h
+++ b/fs/btrfs/tree-log.h
@@ -24,12 +24,14 @@
struct btrfs_log_ctx {
int log_ret;
+ int log_transid;
struct list_head list;
};
static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx)
{
ctx->log_ret = 0;
+ ctx->log_transid = 0;
INIT_LIST_HEAD(&ctx->list);
}