From: Avi Kivity <avi@scylladb.com>
To: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Proposal: CAP_PAYLOAD to reduce Meltdown and Spectre mitigation costs
Date: Sun, 7 Jan 2018 11:16:28 +0200 [thread overview]
Message-ID: <dc3d9f6b-248e-a201-004f-43d99bc7ada0@scylladb.com> (raw)
In-Reply-To: <20180106200232.67387c5a@alans-desktop>
On 01/06/2018 10:02 PM, Alan Cox wrote:
>> I propose to create a new capability, CAP_PAYLOAD, that allows the
>> system administrator to designate an application as the main workload in
>> that system. Other processes (like sshd or monitoring daemons) exist to
>> support it, and so it makes sense to protect the rest of the system from
>> their being compromised.
> Much more general would be to do this with cgroups both for group-group
> trust and group-kernel trust levels.
>
I think capabilities will work just as well with cgroups. The container
manager will set CAP_PAYLOAD to payload containers; and if those run an
init system or a container manager themselves, they'll drop CAP_PAYLOAD
for all process/sub-containers but their payloads.
next prev parent reply other threads:[~2018-01-07 9:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-06 19:33 Avi Kivity
2018-01-06 20:02 ` Alan Cox
2018-01-07 9:16 ` Avi Kivity [this message]
2018-01-07 12:29 ` Theodore Ts'o
2018-01-07 12:34 ` Ozgur
2018-01-07 12:51 ` Avi Kivity
2018-01-07 18:06 ` Theodore Ts'o
2018-01-06 20:24 ` Willy Tarreau
2018-01-07 9:14 ` Avi Kivity
2018-01-07 17:39 ` Willy Tarreau
2018-01-07 14:36 ` Alan Cox
2018-01-07 15:15 ` Avi Kivity
2018-01-07 17:26 ` Willy Tarreau
2018-01-08 1:33 ` Casey Schaufler
2018-01-18 22:49 ` Pavel Machek
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