Re: [PATCH] Turn off XBF_READ_AHEAD in io completion

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

On Thu, Nov 01, 2007 at 05:19:35PM +1100, Lachlan McIlroy wrote:
> Read-ahead of an inode cluster will set XBF_READ_AHEAD in the buffer.
> If we don't remove the flag it will still be set when we flush the
> buffer back to disk.  Not sure if leaving this flag set causes any
> serious problems but it does trigger an assert.

It might be better if such temporary flags never actually make it to
bp->b_flags.  Just pass down a flags variable all the way to
_xfs_buf_ioapply and keep the flags just for this I/O separate from
those that are permanent and in bp->b_flags.