Re: [PATCH linux-2.6.0-test10-mm1] filemap_fdatawait.patch

[Marcelo Tosatti <marcelo.tosatti _at_ xxxxxxxxxxxx>]

On Fri, 2 Jan 2004, Suparna Bhattacharya wrote:

> On Wed, Dec 31, 2003 at 03:17:36AM -0800, Andrew Morton wrote:
> > Andrew Morton <akpm _at_ osdl.org> wrote:
> > >
> > > Let me actually think about this a bit.
> >
> > Nasty.  The same race is present in 2.4.x...

filemap_fdatawait() is always called with i_sem held and
there is no "!PG_dirty and !PG_writeback" window.

Where does the race lies in 2.4 ?

Daniel, Would be interesting to know if the direct IO tests also fail on
2.4.

> > How's about we start new I/O in filemap_fdatawait() if the page is
> > dirty?
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