linux-kernel - Re: [PATCH v16 14/16] x86/sgx: Turn on per-cgroup EPC reclamation

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Message-ID: <fcf55b3c-97df-40c8-bf88-1445f1847b93@intel.com>
Date: Wed, 28 Aug 2024 11:25:17 +1200
From: "Huang, Kai" <kai.huang@...el.com>
To: Haitao Huang <haitao.huang@...ux.intel.com>, <jarkko@...nel.org>,
	<dave.hansen@...ux.intel.com>, <tj@...nel.org>, <mkoutny@...e.com>,
	<chenridong@...wei.com>, <linux-kernel@...r.kernel.org>,
	<linux-sgx@...r.kernel.org>, <x86@...nel.org>, <cgroups@...r.kernel.org>,
	<tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>, <hpa@...or.com>,
	<sohil.mehta@...el.com>, <tim.c.chen@...ux.intel.com>
CC: <zhiquan1.li@...el.com>, <kristen@...ux.intel.com>, <seanjc@...gle.com>,
	<zhanb@...rosoft.com>, <anakrish@...rosoft.com>,
	<mikko.ylinen@...ux.intel.com>, <yangjie@...rosoft.com>,
	<chrisyan@...rosoft.com>
Subject: Re: [PATCH v16 14/16] x86/sgx: Turn on per-cgroup EPC reclamation



On 21/08/2024 1:54 pm, Haitao Huang wrote:
> From: Kristen Carlson Accardi <kristen@...ux.intel.com>
> 
> Previous patches have implemented all infrastructure needed for
> per-cgroup EPC page tracking and reclaiming. But all reclaimable EPC
> pages are still tracked in the global LRU as sgx_epc_page_lru() always
> returns reference to the global LRU.
> 
> Change sgx_epc_page_lru() to return the LRU of the cgroup in which the
> given EPC page is allocated.
> 
> Update sgx_can_reclaim_global(), to check emptiness of LRUs of all
> cgroups, and update sgx_reclaim_pages_global(), to utilize
> sgx_cgroup_reclaim_pages_global(), when EPC cgroup is enabled.
> 
> With these changes, the global reclamation and per-cgroup reclamation
> both work properly with all pages tracked in per-cgroup LRUs.
> 
> Co-developed-by: Sean Christopherson <sean.j.christopherson@...el.com>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> Signed-off-by: Kristen Carlson Accardi <kristen@...ux.intel.com>
> Co-developed-by: Haitao Huang <haitao.huang@...ux.intel.com>
> Signed-off-by: Haitao Huang <haitao.huang@...ux.intel.com>
> Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>

Reviewed-by: Kai Huang <kai.huang@...el.com>