linux-kernel - Re: [RFC] page fault retry with NOPAGE

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Message-Id: <1158876304.26347.129.camel@localhost.localdomain>
Date:	Fri, 22 Sep 2006 08:05:04 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Andrew Morton <akpm@...l.org>
Cc:	Mike Waychison <mikew@...gle.com>, linux-mm@...ck.org,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>
Subject: Re: [RFC] page fault retry with NOPAGE_RETRY

> So I think there's a nasty DoS here if we permit infinite retries.  But
> it's not just that - there might be other situations under really heavy
> memory pressure where livelocks like this can occur.  It's just a general
> robustness-of-implementation issue.

Got it. Now, changing args to no_page() will be a pretty big task....

Ben.


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