Re: [PATCH] [13/16] HWPOISON: The high level memory error handlerin the VM v4

[Wu Fengguang]

On Mon, Jun 01, 2009 at 07:16:41PM +0800, Nick Piggin wrote:
> On Fri, May 29, 2009 at 11:35:39PM +0200, Andi Kleen wrote:
> > +	mapping = page_mapping(p);
> > +	if (!PageDirty(p) && !PageWriteback(p) &&
> > +	    !PageAnon(p) && !PageSwapBacked(p) &&
> > +	    mapping && mapping_cap_account_dirty(mapping)) {
> 
> Haven't had another good look at this yet, but if you hold the
> page locked, and have done a wait_on_page_writeback, then
> PageWriteback == true is a kernel bug.

Right, we can eliminate the PageWriteback() test when there is a
wait_on_page_writeback().
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