From: "Huang, Kai" <kai.huang@intel.com>
To: "mingo@redhat.com" <mingo@redhat.com>,
"linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
"hpa@zytor.com" <hpa@zytor.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"jarkko@kernel.org" <jarkko@kernel.org>,
"bp@alien8.de" <bp@alien8.de>,
"haitao.huang@linux.intel.com" <haitao.huang@linux.intel.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"tj@kernel.org" <tj@kernel.org>,
"Mehta, Sohil" <sohil.mehta@intel.com>
Cc: "kristen@linux.intel.com" <kristen@linux.intel.com>,
"anakrish@microsoft.com" <anakrish@microsoft.com>,
"Li, Zhiquan1" <zhiquan1.li@intel.com>, "Christopherson,,
Sean" <seanjc@google.com>,
"mikko.ylinen@linux.intel.com" <mikko.ylinen@linux.intel.com>,
"yangjie@microsoft.com" <yangjie@microsoft.com>,
"Zhang, Bo" <zhanb@microsoft.com>
Subject: Re: [PATCH v5 09/18] x86/sgx: Store struct sgx_encl when allocating new VA pages
Date: Tue, 3 Oct 2023 20:07:42 +0000 [thread overview]
Message-ID: <0953e4fac90921ff53570e2e6ebd2689fc1cd8fa.camel@intel.com> (raw)
In-Reply-To: <op.2b77pp0wwjvjmi@hhuan26-mobl.amr.corp.intel.com>
On Tue, 2023-10-03 at 01:45 -0500, Haitao Huang wrote:
> >
> > Btw, probably a dumb question:
> >
> > Theoretically if you only need to find a victim enclave you don't need
> > to put VA
> > pages to the unreclaimable list, because those VA pages will be freed
> > anyway
> > when enclave is killed. So keeping VA pages in the list is for
> > accounting all
> > the pages that the cgroup is having?
>
> Yes basically tracking them in cgroups as they are allocated.
>
> VAs and SECS may also come and go as swapping/unswapping happens. But if a
> cgroup is OOM, and all reclaimables are gone (swapped out), it'd have to
> reclaim VAs/SECs in the same cgroup starting from the front of the LRU
> list. To reclaim a VA/SECS, it identifies the enclave from the owner of
> the VA/SECS page and kills it, as killing enclave is the only way to
> reclaim VA/SECS pages.
To kill enclave you just need to track SECS in the unreclaimable list.
Only when you want to account the total EPC pages via some list you _probably_
need to track VA as well. But I am not quite sure about this either.
next prev parent reply other threads:[~2023-10-03 20:08 UTC|newest]
Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-23 3:06 [PATCH v5 00/18] Add Cgroup support for SGX EPC memory Haitao Huang
2023-09-23 3:06 ` [PATCH v5 03/18] x86/sgx: Add sgx_epc_lru_lists to encapsulate LRU lists Haitao Huang
[not found] ` <20230923030657.16148-1-haitao.huang-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2023-09-23 3:06 ` [PATCH v5 01/18] cgroup/misc: Add per resource callbacks for CSS events Haitao Huang
[not found] ` <20230923030657.16148-2-haitao.huang-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2023-09-25 17:09 ` Jarkko Sakkinen
2023-09-25 17:09 ` Jarkko Sakkinen
2023-09-26 3:04 ` Haitao Huang
[not found] ` <op.2buytfetwjvjmi-yDQzE4XY+yVaPPhiJ6yCxLKMmGWinSIL2HeeBUIffwg@public.gmane.org>
2023-09-26 13:10 ` Jarkko Sakkinen
2023-09-26 13:10 ` Jarkko Sakkinen
2023-09-26 13:13 ` Jarkko Sakkinen
2023-09-26 13:13 ` Jarkko Sakkinen
2023-09-27 1:56 ` Haitao Huang
2023-10-02 22:47 ` Jarkko Sakkinen
2023-10-02 22:55 ` Jarkko Sakkinen
2023-10-04 15:45 ` Haitao Huang
2023-10-04 17:18 ` Tejun Heo
2023-09-27 9:20 ` Huang, Kai
2023-10-03 14:29 ` Haitao Huang
2023-10-17 18:55 ` Michal Koutný
2023-09-23 3:06 ` [PATCH v5 02/18] cgroup/misc: Add SGX EPC resource type and export APIs for SGX driver Haitao Huang
[not found] ` <20230923030657.16148-3-haitao.huang-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2023-09-25 18:50 ` Tejun Heo
2023-09-25 18:50 ` Tejun Heo
2023-09-28 3:59 ` Huang, Kai
2023-10-03 7:00 ` Haitao Huang
2023-10-03 19:33 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 04/18] x86/sgx: Use sgx_epc_lru_lists for existing active page list Haitao Huang
2023-09-23 3:06 ` [PATCH v5 05/18] x86/sgx: Store reclaimable EPC pages in sgx_epc_lru_lists Haitao Huang
2023-09-27 10:14 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 06/18] x86/sgx: Introduce EPC page states Haitao Huang
[not found] ` <20230923030657.16148-7-haitao.huang-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2023-09-25 17:11 ` Jarkko Sakkinen
2023-09-25 17:11 ` Jarkko Sakkinen
2023-09-27 10:28 ` Huang, Kai
2023-10-03 4:49 ` Haitao Huang
2023-10-03 20:03 ` Huang, Kai
2023-10-04 15:24 ` Haitao Huang
2023-10-04 21:05 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 07/18] x86/sgx: Introduce RECLAIM_IN_PROGRESS state Haitao Huang
2023-09-25 17:13 ` Jarkko Sakkinen
2023-09-25 17:13 ` Jarkko Sakkinen
2023-09-27 10:42 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 08/18] x86/sgx: Use a list to track to-be-reclaimed pages Haitao Huang
2023-09-28 9:28 ` Huang, Kai
2023-10-03 5:09 ` Haitao Huang
2023-09-23 3:06 ` [PATCH v5 09/18] x86/sgx: Store struct sgx_encl when allocating new VA pages Haitao Huang
2023-09-27 11:14 ` Huang, Kai
2023-09-27 15:35 ` Haitao Huang
2023-09-27 21:21 ` Huang, Kai
2023-09-29 15:06 ` Haitao Huang
2023-10-02 11:05 ` Huang, Kai
2023-09-27 11:35 ` Huang, Kai
2023-10-03 6:45 ` Haitao Huang
2023-10-03 20:07 ` Huang, Kai [this message]
2023-10-04 15:03 ` Haitao Huang
2023-10-04 21:13 ` Huang, Kai
2023-10-05 4:22 ` Haitao Huang
2023-10-05 6:49 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 10/18] x86/sgx: Add EPC page flags to identify owner types Haitao Huang
2023-09-23 3:06 ` [PATCH v5 11/18] x86/sgx: store unreclaimable pages in LRU lists Haitao Huang
2023-09-27 11:57 ` Huang, Kai
2023-10-03 5:42 ` Haitao Huang
2023-09-28 9:41 ` Huang, Kai
2023-10-03 5:15 ` Haitao Huang
2023-10-03 20:12 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 12/18] x86/sgx: Add EPC OOM path to forcefully reclaim EPC Haitao Huang
2023-10-09 23:45 ` Huang, Kai
2023-10-10 0:23 ` Sean Christopherson
2023-10-10 0:50 ` Huang, Kai
2023-10-10 1:34 ` Huang, Kai
2023-10-10 16:49 ` Haitao Huang
2023-10-11 0:51 ` Huang, Kai
2023-10-12 13:27 ` Haitao Huang
2023-10-16 10:57 ` Huang, Kai
2023-10-16 19:52 ` Haitao Huang
2023-10-16 21:09 ` Huang, Kai
2023-10-17 0:10 ` Haitao Huang
2023-10-17 1:34 ` Huang, Kai
2023-10-17 12:58 ` Haitao Huang
2023-10-17 18:54 ` Michal Koutný
2023-10-17 19:13 ` Michal Koutný
2023-10-18 4:39 ` Haitao Huang
2023-10-18 4:37 ` Haitao Huang
2023-10-18 13:55 ` Dave Hansen
2023-10-18 15:26 ` Haitao Huang
2023-10-18 15:37 ` Dave Hansen
2023-10-18 15:52 ` Michal Koutný
2023-10-18 16:25 ` Haitao Huang
2023-10-16 21:32 ` Sean Christopherson
2023-10-17 0:09 ` Haitao Huang
2023-10-17 15:43 ` Sean Christopherson
2023-10-17 11:49 ` Mikko Ylinen
2023-10-11 1:14 ` Huang, Kai
2023-10-16 11:02 ` Huang, Kai
2023-10-10 1:42 ` Haitao Huang
2023-10-10 2:23 ` Huang, Kai
2023-10-10 13:26 ` Haitao Huang
2023-10-11 0:01 ` Sean Christopherson
2023-10-11 15:02 ` Haitao Huang
2023-10-10 1:04 ` Haitao Huang
2023-10-10 1:18 ` Huang, Kai
2023-10-10 1:38 ` Haitao Huang
2023-10-10 2:12 ` Huang, Kai
2023-10-10 17:05 ` Haitao Huang
2023-10-11 0:31 ` Huang, Kai
2023-10-11 16:04 ` Haitao Huang
2023-09-23 3:06 ` [PATCH v5 13/18] x86/sgx: Expose sgx_reclaim_pages() for use by EPC cgroup Haitao Huang
2023-10-05 12:24 ` Huang, Kai
2023-10-05 19:23 ` Haitao Huang
2023-10-05 20:25 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 14/18] x86/sgx: Add helper to grab pages from an arbitrary EPC LRU Haitao Huang
2023-09-23 3:06 ` [PATCH v5 15/18] x86/sgx: Prepare for multiple LRUs Haitao Huang
2023-10-05 12:30 ` Huang, Kai
2023-10-05 19:33 ` Haitao Huang
2023-10-05 20:38 ` Huang, Kai
2023-09-23 3:06 ` [PATCH v5 16/18] x86/sgx: Limit process EPC usage with misc cgroup controller Haitao Huang
[not found] ` <20230923030657.16148-17-haitao.huang-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2023-09-25 17:15 ` Jarkko Sakkinen
2023-09-25 17:15 ` Jarkko Sakkinen
2023-10-05 21:01 ` Huang, Kai
2023-10-10 0:12 ` Huang, Kai
2023-10-10 0:16 ` Huang, Kai
2023-10-10 0:26 ` Huang, Kai
2023-10-22 18:26 ` Haitao Huang
2023-10-10 9:19 ` Huang, Kai
2023-10-10 9:32 ` Huang, Kai
2023-10-17 18:54 ` Michal Koutný
2023-10-19 16:05 ` Haitao Huang
2023-09-23 3:06 ` [PATCH v5 17/18] Docs/x86/sgx: Add description for cgroup support Haitao Huang
2023-09-23 3:06 ` [PATCH v5 18/18] selftests/sgx: Add scripts for EPC cgroup testing Haitao Huang
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