linux-kernel - Re: [patch 2/5] mm: fault vs invalidate/truncate race fix

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Message-ID: <Pine.LNX.4.64.0610120834580.3952@g5.osdl.org>
Date:	Thu, 12 Oct 2006 08:37:39 -0700 (PDT)
From:	Linus Torvalds <torvalds@...l.org>
To:	Nick Piggin <npiggin@...e.de>
cc:	Andrew Morton <akpm@...l.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Linux Memory Management <linux-mm@...ck.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [patch 2/5] mm: fault vs invalidate/truncate race fix



On Thu, 12 Oct 2006, Nick Piggin wrote:
> 
> > Are you saying that something like this would be preferable?
> 
> I think so, it is neater and clearer. I actually didn't even bother relocking
> and checking the page again on readpage error so got rid of quite a bit of
> code.

Well, the readpage error should be rare (and for the _normal_ case we just 
do the "wait_on_page_locked()" thing). And I think we should lock the page 
in order to do the truncation check, no?

But I don't have any really strong feelings. I'm certainly ok with the 
patch I sent out. How about putting it through -mm? Here's my sign-off:

	Signed-off-by: Linus Torvalds <torvalds@...l.org>

if you want to send it off to Andrew (or if Andrew wants to just take it 
himself ;)

Btw, how did you even notice this? Just by reading the source, or because 
you actually saw multiple errors reported?

		Linus
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