linux-kernel - Re: [PATCH v6 04/12] x86/sgx: Implement basic EPC misc cgroup functionality

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Message-ID: <op.2e0yv0bnwjvjmi@hhuan26-mobl.amr.corp.intel.com>
Date:   Mon, 27 Nov 2023 00:32:14 +0800
From:   "Haitao Huang" <haitao.huang@...ux.intel.com>
To:     "tj@...nel.org" <tj@...nel.org>,
        "jarkko@...nel.org" <jarkko@...nel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
        "hpa@...or.com" <hpa@...or.com>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mkoutny@...e.com" <mkoutny@...e.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
        "Mehta, Sohil" <sohil.mehta@...el.com>,
        "bp@...en8.de" <bp@...en8.de>, "Huang, Kai" <kai.huang@...el.com>,
        "Haitao Huang" <haitao.huang@...ux.intel.com>
Cc:     "mikko.ylinen@...ux.intel.com" <mikko.ylinen@...ux.intel.com>,
        "seanjc@...gle.com" <seanjc@...gle.com>,
        "Zhang, Bo" <zhanb@...rosoft.com>,
        "kristen@...ux.intel.com" <kristen@...ux.intel.com>,
        "yangjie@...rosoft.com" <yangjie@...rosoft.com>,
        "sean.j.christopherson@...el.com" <sean.j.christopherson@...el.com>,
        "Li, Zhiquan1" <zhiquan1.li@...el.com>,
        "anakrish@...rosoft.com" <anakrish@...rosoft.com>
Subject: Re: [PATCH v6 04/12] x86/sgx: Implement basic EPC misc cgroup
 functionality

On Mon, 27 Nov 2023 00:01:56 +0800, Haitao Huang  
<haitao.huang@...ux.intel.com> wrote:
>>> > > > > Then here we can have something like:
>>> > > > >
>>> > > > > 	void sgx_reclaim_pages(struct sgx_epc_cg *epc_cg)
>>> > > > > 	{
>>> > > > > 		struct sgx_epc_lru_list *lru =			epc_cg ? &epc_cg->lru :
>>> > > > > &sgx_global_lru;
>>> > > > >
>>> > > > > 		sgx_reclaim_pages_lru(lru);
>>> > > > > 	}
>>> > > > >
>>> > > > > Makes sense?
>>> > > > >
>
> The reason we 'isolate' first then do real 'reclaim' is that the actual  
> reclaim is expensive and especially for eblock, etrack, etc.
Sorry this is out of context. It was meant to be in the other response for  
patch 9/12.

Also FYI I'm traveling for a vacation and email access may be sporadic.

BR
Haitao