linux-kernel - Re: [PATCH v2 3/3] NFS: Fix a memory leak in nfs

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Message-ID: <AANLkTinpvMJsC2XMUyDTaAdozFBLkcdde5_V57Jx-Z4w@mail.gmail.com>
Date:	Wed, 1 Dec 2010 17:42:08 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Trond Myklebust <Trond.Myklebust@...app.com>,
	Hugh Dickins <hughd@...gle.com>,
	Nick Piggin <npiggin@...nel.dk>,
	Nick Bowler <nbowler@...iptictech.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-nfs@...r.kernel.org, Rik van Riel <riel@...hat.com>,
	Christoph Hellwig <hch@....de>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v2 3/3] NFS: Fix a memory leak in nfs_readdir

On Wed, Dec 1, 2010 at 5:22 PM, Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> What we're talking about is races against memory reclaim, unmount, etc.

Ahh. Those I can believe in. Although I think they'd almost
incidentally be fixed by making inode freeing (which is where the
'struct address_space' is embedded) RCU-safe, which we're going to do
anyway in 38. Then we could make the vmscan code just be a rcu-read
section.

Of course,  I do think the race is basically impossible to hit in
practice regardless.

                            Linus
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