linux-kernel - Re: bad page state in 3.13-rc4

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Message-ID: <CA+55aFzW_MKS35Mn9cfZV2A4BH_ONZCmmdk1pQtztbxwPYsxpA@mail.gmail.com>
Date:	Fri, 20 Dec 2013 05:31:29 +0900
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Benjamin LaHaise <bcrl@...ck.org>
Cc:	Kent Overstreet <kmo@...erainc.com>, Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, Christoph Lameter <cl@...two.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: bad page state in 3.13-rc4

On Fri, Dec 20, 2013 at 5:11 AM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> So here's the same patch, but with stuff moved around a bit, and the
> "oops, couldn't create page" part fixed.
>
> Bit it's still totally and entirely untested.

Btw, I think this actually fixes a bug, in that it doesn't leak the
page reference count if the do_mmap_pgoff() call fails.

That said, that looks like just a memory leak, not explaining the
problem Dave sees. And maybe I'm missing something.

And no, I still haven't actually tested this at all. Is there an aio
tester that is worth trying?

                   Linus
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