linux-kernel - Re: [BUG] infinite loop in find_get

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Message-ID: <CA+55aFyzjX9kkHZUVg=zZsOQjq1xoNBk2QvJjjnbUx3BOF5Fzg@mail.gmail.com>
Date:	Wed, 14 Sep 2011 15:37:19 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Shaohua Li <shaohua.li@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Rik van Riel <riel@...hat.com>,
	Lin Ming <mlin@...pku.edu.cn>,
	Justin Piszcz <jpiszcz@...idpixels.com>,
	Pawel Sikora <pluto@...k.net>
Subject: Re: [BUG] infinite loop in find_get_pages()

On Wed, Sep 14, 2011 at 2:53 PM, Hugh Dickins <hughd@...gle.com> wrote:
>
> Thanks, Eric, though it may not be worth spending your time on it.
> It occurred to me over lunch that it may take painfully longer than
> expected to invalidate_mapping_pages() on a single-swapped-out-page
> 1TB sparse tmpfs file - all those "start += 1" restarts until it
> reaches the end.

So can we have a stop-gap patch to just fixes it for now? I assume
that would be Shaohua's patch with the "nr_found > nr_skip" change?

Can you guys send whatever patch is appropriate for now with a nice
changelog and the appropriate sign-offs, please? So that we can at
least close the issue...

                       Linus
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