Re: [sunrpc] remove xdr_kmap()

["David S. Miller" <davem@davemloft.net>]

On Tue, 28 Dec 2004 18:09:38 -0800
William Lee Irwin III <wli@holomorphy.com> wrote:

> On Tue, 28 Dec 2004 15:04:16 -0800 William Lee Irwin III <wli@holomorphy.com> wrote:
> >> In this process, I stumbled over a blatant kmap() deadlock in
> >> xdr_kmap(), which fortunately is never called.
> 
> On Tue, Dec 28, 2004 at 05:12:46PM -0800, David S. Miller wrote:
> > This got zapped by a cleanup patch by Adrian Bunk which
> > I applied yesterdat.  Linus just hasn't pulled from my
> > tree yet.
> 
> Sounds good. I only missed it because it was in the middle of a
> larger set of changes. Now I just have to find where in nfs the
> missing flush_dcache_page() calls need to be so I can boot 2.6
> on a bunch of boxen.

I remember adding the calls ages ago, wonder what happened.

I see a bunch of memclear_highpage_flush() calls, but flush_dcache_page()
calls.  I guess these are done at the sunrpc/xdr layer.

There is a flush_dcache_page() call for xdr_partial_copy_from_skb()
but calls are also needed in _copy_to_pages() and
_shift_data_right_pages().  The rest which access pages are copying
from pages, not into them, so those should be ok.