linux-kernel - Re: [RFC PATCH 05/20] x86/sgx: Introduce unreclaimable EPC page lists

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Message-ID: <Yy20ov/Pcxo3tBSn@kernel.org>
Date:   Fri, 23 Sep 2022 16:29:06 +0300
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Kristen Carlson Accardi <kristen@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org,
        cgroups@...r.kernel.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>,
        Sean Christopherson <seanjc@...gle.com>
Subject: Re: [RFC PATCH 05/20] x86/sgx: Introduce unreclaimable EPC page lists

On Thu, Sep 22, 2022 at 10:10:42AM -0700, Kristen Carlson Accardi wrote:
> From: Sean Christopherson <sean.j.christopherson@...el.com>
> 
> Add code to keep track of pages that are not tracked by the reclaimer
> in the LRU's "unreclaimable" list. When there is an OOM event and an
> enclave must be OOM killed, the EPC pages which are not tracked by
> the reclaimer can still be freed.
> 
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
> Signed-off-by: Kristen Carlson Accardi <kristen@...ux.intel.com>
> Cc: Sean Christopherson <seanjc@...gle.com>

This could have some description of what is actually happening in
this patch.

BR, Jarkko