linux-kernel - Re: [PATCH] nfs: fix congestion control

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Date:	Fri, 19 Jan 2007 10:33:54 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	Christoph Lameter <clameter@....com>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH] nfs: fix congestion control

On Thu, 2007-01-18 at 10:49 -0500, Trond Myklebust wrote:

> After the dirty page has been written to unstable storage, it marks the
> inode using I_DIRTY_DATASYNC, which should then ensure that the VFS
> calls write_inode() on the next pass through __sync_single_inode.

> I'd rather like to see fs/fs-writeback.c do this correctly (assuming
> that it is incorrect now).

balance_dirty_pages()
  wbc.sync_mode = WB_SYNC_NONE;
  writeback_inodes()
    sync_sb_inodes()
      __writeback_single_inode()
        __sync_single_inode()
          write_inode()
            nfs_write_inode()

Ah, yes, I see. That ought to work.

/me goes verify he didn't mess it up himself...



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