[PATCH] xfs: ensure log covering transactions are synchronous

[Christoph Hellwig]

Ok, my fault for asking to avoid stalling xfssyncd.

> Fix this by making the log covering transaction synchronous. To
> avoid additional log force from xfssyncd, make the log covering
> transaction take the place of the existing log force in the xfssyncd
> background sync process.

This also looks correct to me.  We replace a force with a lsn-force, but
given that we just started the transaction those should be equivalent.


Reviewed-by: Christoph Hellwig <hch at lst.de>