From: Jarkko Sakkinen <jarkko@kernel.org>
To: Kristen Carlson Accardi <kristen@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org,
cgroups@vger.kernel.org
Subject: Re: [RFC PATCH 00/20] Add Cgroup support for SGX EPC memory
Date: Fri, 23 Sep 2022 15:24:07 +0300 [thread overview]
Message-ID: <Yy2lZx6u1dhFO34i@kernel.org> (raw)
In-Reply-To: <20220922171057.1236139-1-kristen@linux.intel.com>
On Thu, Sep 22, 2022 at 10:10:37AM -0700, Kristen Carlson Accardi wrote:
> Add a new cgroup controller to regulate the distribution of SGX EPC memory,
> which is a subset of system RAM that is used to provide SGX-enabled
> applications with protected memory, and is otherwise inaccessible.
>
> SGX EPC memory allocations are separate from normal RAM allocations,
> and is managed solely by the SGX subsystem. The existing cgroup memory
> controller cannot be used to limit or account for SGX EPC memory.
>
> This patchset implements the sgx_epc cgroup controller, which will provide
> support for stats, events, and the following interface files:
>
> sgx_epc.current
> A read-only value which represents the total amount of EPC
> memory currently being used on by the cgroup and its descendents.
>
> sgx_epc.low
> A read-write value which is used to set best-effort protection
> of EPC usage. If the EPC usage of a cgroup drops below this value,
> then the cgroup's EPC memory will not be reclaimed if possible.
>
> sgx_epc.high
> A read-write value which is used to set a best-effort limit
> on the amount of EPC usage a cgroup has. If a cgroup's usage
> goes past the high value, the EPC memory of that cgroup will
> get reclaimed back under the high limit.
>
> sgx_epc.max
> A read-write value which is used to set a hard limit for
> cgroup EPC usage. If a cgroup's EPC usage reaches this limit,
> allocations are blocked until EPC memory can be reclaimed from
> the cgroup.
It would be worth of mentioning for clarity that shmem is accounted from
memcg.
BR, Jarkko
WARNING: multiple messages have this Message-ID (diff)
From: Jarkko Sakkinen <jarkko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Kristen Carlson Accardi
<kristen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-sgx-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [RFC PATCH 00/20] Add Cgroup support for SGX EPC memory
Date: Fri, 23 Sep 2022 15:24:07 +0300 [thread overview]
Message-ID: <Yy2lZx6u1dhFO34i@kernel.org> (raw)
In-Reply-To: <20220922171057.1236139-1-kristen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
On Thu, Sep 22, 2022 at 10:10:37AM -0700, Kristen Carlson Accardi wrote:
> Add a new cgroup controller to regulate the distribution of SGX EPC memory,
> which is a subset of system RAM that is used to provide SGX-enabled
> applications with protected memory, and is otherwise inaccessible.
>
> SGX EPC memory allocations are separate from normal RAM allocations,
> and is managed solely by the SGX subsystem. The existing cgroup memory
> controller cannot be used to limit or account for SGX EPC memory.
>
> This patchset implements the sgx_epc cgroup controller, which will provide
> support for stats, events, and the following interface files:
>
> sgx_epc.current
> A read-only value which represents the total amount of EPC
> memory currently being used on by the cgroup and its descendents.
>
> sgx_epc.low
> A read-write value which is used to set best-effort protection
> of EPC usage. If the EPC usage of a cgroup drops below this value,
> then the cgroup's EPC memory will not be reclaimed if possible.
>
> sgx_epc.high
> A read-write value which is used to set a best-effort limit
> on the amount of EPC usage a cgroup has. If a cgroup's usage
> goes past the high value, the EPC memory of that cgroup will
> get reclaimed back under the high limit.
>
> sgx_epc.max
> A read-write value which is used to set a hard limit for
> cgroup EPC usage. If a cgroup's EPC usage reaches this limit,
> allocations are blocked until EPC memory can be reclaimed from
> the cgroup.
It would be worth of mentioning for clarity that shmem is accounted from
memcg.
BR, Jarkko
next prev parent reply other threads:[~2022-09-23 12:28 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 17:10 [RFC PATCH 00/20] Add Cgroup support for SGX EPC memory Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 01/20] x86/sgx: Call cond_resched() at the end of sgx_reclaim_pages() Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-23 12:32 ` Jarkko Sakkinen
2022-09-23 12:32 ` Jarkko Sakkinen
2022-09-23 12:35 ` Jarkko Sakkinen
2022-09-23 12:35 ` Jarkko Sakkinen
2022-09-23 12:37 ` Jarkko Sakkinen
2022-09-23 12:37 ` Jarkko Sakkinen
2022-09-22 17:10 ` [RFC PATCH 02/20] x86/sgx: Store EPC page owner as a 'void *' to handle multiple users Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 18:54 ` Dave Hansen
2022-09-22 18:54 ` Dave Hansen
2022-09-23 12:49 ` Jarkko Sakkinen
2022-09-23 12:49 ` Jarkko Sakkinen
2022-09-22 17:10 ` [RFC PATCH 03/20] x86/sgx: Track owning enclave in VA EPC pages Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 18:55 ` Dave Hansen
2022-09-22 18:55 ` Dave Hansen
2022-09-22 20:04 ` Kristen Carlson Accardi
2022-09-22 20:04 ` Kristen Carlson Accardi
2022-09-22 21:39 ` Dave Hansen
2022-09-22 21:39 ` Dave Hansen
2022-09-23 12:52 ` Jarkko Sakkinen
2022-09-23 12:52 ` Jarkko Sakkinen
2022-09-22 17:10 ` [RFC PATCH 04/20] x86/sgx: Add 'struct sgx_epc_lru' to encapsulate lru list(s) Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-23 13:20 ` Jarkko Sakkinen
2022-09-23 13:20 ` Jarkko Sakkinen
2022-09-29 23:04 ` Kristen Carlson Accardi
2022-09-29 23:04 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 05/20] x86/sgx: Introduce unreclaimable EPC page lists Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-23 13:29 ` Jarkko Sakkinen
2022-09-23 13:29 ` Jarkko Sakkinen
2022-09-22 17:10 ` [RFC PATCH 06/20] x86/sgx: Introduce RECLAIM_IN_PROGRESS flag for EPC pages Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 07/20] x86/sgx: Use a list to track to-be-reclaimed pages during reclaim Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 08/20] x86/sgx: Add EPC page flags to identify type of page Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 09/20] x86/sgx: Allow reclaiming up to 32 pages, but scan 16 by default Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 10/20] x86/sgx: Return the number of EPC pages that were successfully reclaimed Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 11/20] x86/sgx: Add option to ignore age of page during EPC reclaim Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 12/20] x86/sgx: Add helper to retrieve SGX EPC LRU given an EPC page Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 13/20] x86/sgx: Prepare for multiple LRUs Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 14/20] x86/sgx: Expose sgx_reclaim_pages() for use by EPC cgroup Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 15/20] x86/sgx: Add helper to grab pages from an arbitrary EPC LRU Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 16/20] x86/sgx: Add EPC OOM path to forcefully reclaim EPC Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 17/20] cgroup, x86/sgx: Add SGX EPC cgroup controller Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 18/20] x86/sgx: Enable EPC cgroup controller in SGX core Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 19/20] x86/sgx: Add stats and events interfaces to EPC cgroup controller Kristen Carlson Accardi
2022-09-22 17:10 ` Kristen Carlson Accardi
2022-09-22 17:10 ` [RFC PATCH 20/20] docs, cgroup, x86/sgx: Add SGX EPC cgroup controller documentation Kristen Carlson Accardi
2022-09-22 17:41 ` [RFC PATCH 00/20] Add Cgroup support for SGX EPC memory Tejun Heo
2022-09-22 17:41 ` Tejun Heo
2022-09-22 18:59 ` Kristen Carlson Accardi
2022-09-22 18:59 ` Kristen Carlson Accardi
2022-09-22 19:08 ` Tejun Heo
2022-09-22 19:08 ` Tejun Heo
2022-09-22 21:03 ` Dave Hansen
2022-09-22 21:03 ` Dave Hansen
2022-09-24 0:09 ` Tejun Heo
2022-09-24 0:09 ` Tejun Heo
2022-09-26 18:30 ` Kristen Carlson Accardi
2022-09-26 18:30 ` Kristen Carlson Accardi
2022-10-07 16:39 ` Kristen Carlson Accardi
2022-10-07 16:39 ` Kristen Carlson Accardi
2022-10-07 16:42 ` Tejun Heo
2022-10-07 16:42 ` Tejun Heo
2022-10-07 16:46 ` Kristen Carlson Accardi
2022-10-07 16:46 ` Kristen Carlson Accardi
2022-09-23 12:24 ` Jarkko Sakkinen [this message]
2022-09-23 12:24 ` Jarkko Sakkinen
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