Miao Xie
2010-Nov-25 09:54 UTC
[RFC PATCH 2/4] Btrfs: add MS_RDONLY to avoid backgroud writeback
From: Liu Bo <liubo2009@cn.fujitsu.com> When the filesystem is readonly, commit transaction is forbiddened. Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> --- fs/btrfs/transaction.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 1fffbc0..45c76b9 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1188,6 +1188,13 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, unsigned long now = get_seconds(); int flush_on_commit = btrfs_test_opt(root, FLUSHONCOMMIT); + /* + * Since some error may force btrfs readonly, this can + * avoid backgroud writeback. + */ + if (root->fs_info->sb->s_flags & MS_RDONLY) + return 0; + btrfs_run_ordered_operations(root, 0); /* make a pass through all the delayed refs we have so far -- 1.7.0.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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