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

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Message-ID: <PH7PR11MB5983039E8636155051E68BACF7A9A@PH7PR11MB5983.namprd11.prod.outlook.com>
Date:   Tue, 7 Nov 2023 19:07:59 +0000
From:   "Huang, Kai" <kai.huang@...el.com>
To:     Haitao Huang <haitao.huang@...ux.intel.com>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "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>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
        "mkoutny@...e.com" <mkoutny@...e.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "tj@...nel.org" <tj@...nel.org>,
        "Mehta, Sohil" <sohil.mehta@...el.com>,
        "bp@...en8.de" <bp@...en8.de>
CC:     "mikko.ylinen@...ux.intel.com" <mikko.ylinen@...ux.intel.com>,
        "Christopherson,, Sean" <seanjc@...gle.com>,
        "Zhang, Bo" <zhanb@...rosoft.com>,
        "kristen@...ux.intel.com" <kristen@...ux.intel.com>,
        "anakrish@...rosoft.com" <anakrish@...rosoft.com>,
        "sean.j.christopherson@...el.com" <sean.j.christopherson@...el.com>,
        "Li, Zhiquan1" <zhiquan1.li@...el.com>,
        "yangjie@...rosoft.com" <yangjie@...rosoft.com>
Subject: RE: [PATCH v6 04/12] x86/sgx: Implement basic EPC misc cgroup
 functionality

> I should have sticked to the orignial comment added in code. Actually
> __sgx_alloc_epc_page() can fail if system runs out of EPC. That's the really reason
> for global reclaim. The free count enforcement is near the end of this method
> after should_reclaim() check.

Hi Haitao,

Sorry I have something else to do at this moment and will continue this series next week.