Re: [PATCH 3/5] xfs: convert ENOSPC inode flushing to use new syncd workqueue

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

I still don't see any point in having the ENOSPC flushing moved to a
different context.

Just add a mutex and flush inline, e.g.

void
xfs_flush_inodes(
        struct xfs_inode        *ip)
{
        struct xfs_mount        *mp = ip->i_mount;

        if (!mutex_trylock(&xfs_syncd_lock))
                return;         /* someone else is flushing right now */
        xfs_sync_data(mp, SYNC_TRYLOCK);
        xfs_sync_data(mp, SYNC_TRYLOCK | SYNC_WAIT);
        xfs_log_force(mp, XFS_LOG_SYNC);
        mutex_unlock(&xfs_syncd_lock);
}