From: David Rientjes <rientjes@google.com>
To: Yang Shi <yang.shi@linux.alibaba.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
hughd@google.com, aaron.lu@intel.com, akpm@linux-foundation.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: thp: remove use_zero_page sysfs knob
Date: Mon, 23 Jul 2018 13:31:08 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.21.1807231329080.105582@chino.kir.corp.google.com> (raw)
In-Reply-To: <3118b646-681e-a2aa-dc7b-71d4821fa50f@linux.alibaba.com>
On Fri, 20 Jul 2018, Yang Shi wrote:
> I agree to keep it for a while to let that security bug cool down, however, if
> there is no user anymore, it sounds pointless to still keep a dead knob.
>
It's not a dead knob. We use it, and for reasons other than
CVE-2017-1000405. To mitigate the cost of constantly compacting memory to
allocate it after it has been freed due to memry pressure, we can either
continue to disable it, allow it to be persistently available, or use a
new value for use_zero_page to specify it should be persistently
available.
next prev parent reply other threads:[~2018-07-23 20:31 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-20 18:13 Yang Shi
2018-07-20 19:32 ` Andrew Morton
2018-07-20 20:02 ` David Rientjes
2018-07-20 20:37 ` Yang Shi
2018-07-20 21:05 ` David Rientjes
2018-07-20 23:49 ` Yang Shi
2018-07-22 3:51 ` Matthew Wilcox
2018-07-23 20:28 ` David Rientjes
2018-07-23 21:33 ` David Rientjes
2018-07-23 21:49 ` Yang Shi
2018-07-24 9:08 ` Kirill A. Shutemov
2018-07-24 20:32 ` David Rientjes
2018-07-20 21:06 ` Kirill A. Shutemov
2018-07-20 23:51 ` Yang Shi
2018-07-23 20:31 ` David Rientjes [this message]
2018-07-23 21:52 ` Yang Shi
2018-07-23 23:14 ` David Rientjes
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