linux-kernel - Re: [PATCH v2 1/2] x86/sgx: Add accounting for tracking overcommit

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Message-ID: <171631a9-aaec-f590-3377-29c13fc6041e@intel.com>
Date:   Fri, 7 Jan 2022 10:46:48 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Kristen Carlson Accardi <kristen@...ux.intel.com>,
        linux-sgx@...r.kernel.org, Jarkko Sakkinen <jarkko@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] x86/sgx: Add accounting for tracking overcommit

On 1/7/22 10:16, Kristen Carlson Accardi wrote:
> The overcommit percentage value is 150, which limits the total number of
> shared memory pages that may be consumed by all enclaves as backing pages
> to 1.5X of EPC pages on the system.

Hi Kristen,

Could you give some background on how this value was chosen and how it 
might impact userspace?