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From: Andy Lutomirski <luto@kernel.org>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
	linux-sgx@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
	Cedric Xing <cedric.xing@intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Jethro Beekman <jethro@fortanix.com>,
	"Dr . Greg Wettstein" <greg@enjellic.com>
Subject: Re: [PATCH 5/7] x86/sgx: Add flag to zero added region instead of copying from source
Date: Thu, 6 Jun 2019 10:20:38 -0700
Message-ID: <CALCETrXkWHOFUD0erQ+TZMY3VmGJz8=tk9rXOtdi8fP_GDEKCA@mail.gmail.com> (raw)
In-Reply-To: <20190605194845.926-6-sean.j.christopherson@intel.com>

On Wed, Jun 5, 2019 at 12:49 PM Sean Christopherson
<sean.j.christopherson@intel.com> wrote:
>
> For some enclaves, e.g. an enclave with a small code footprint and a
> large working set, the vast majority of pages added to the enclave are
> zero pages.  Introduce a flag to denote such zero pages.  The major
> benefit of the flag will be realized in a future patch to use Linux's
> actual zero page as the source, as opposed to explicitly zeroing the
> enclave's backing memory.
>

I feel like I probably asked this at some point, but why is there a
workqueue here at all?

  reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-05 19:48 [PATCH 0/7] x86/sgx: Clean up and enhance add pages ioctl Sean Christopherson
2019-06-05 19:48 ` [PATCH 1/7] x86/sgx: Remove dead code to handle non-existent IOR ioctl Sean Christopherson
2019-06-05 19:48 ` [PATCH 2/7] x86/sgx: Remove unnecessary @cmd parameter from ioctl helpers Sean Christopherson
2019-06-05 19:48 ` [PATCH 3/7] x86/sgx: Let ioctl helpers do copy to/from user Sean Christopherson
2019-06-05 19:48 ` [PATCH 4/7] x86/sgx: Allow userspace to add multiple pages in single ioctl() Sean Christopherson
2019-06-06 15:47   ` Jarkko Sakkinen
2019-06-13  0:43   ` Jethro Beekman
2019-06-13 16:51     ` Sean Christopherson
2019-06-13 19:05       ` Andy Lutomirski
2019-06-13 19:15         ` Sean Christopherson
2019-06-13 19:45       ` Xing, Cedric
2019-06-05 19:48 ` [PATCH 5/7] x86/sgx: Add flag to zero added region instead of copying from source Sean Christopherson
2019-06-06 17:20   ` Andy Lutomirski [this message]
2019-06-06 17:32     ` Sean Christopherson
2019-06-07 19:32       ` Andy Lutomirski
2019-06-10 17:06         ` Jarkko Sakkinen
2019-06-10 18:09         ` Xing, Cedric
2019-06-10 18:41           ` Sean Christopherson
2019-06-10 18:53         ` Sean Christopherson
2019-06-13  0:38           ` Jethro Beekman
2019-06-13 13:46             ` Sean Christopherson
2019-06-13 16:16               ` Andy Lutomirski
2019-06-13 16:54                 ` Sean Christopherson
2019-06-05 19:48 ` [PATCH 6/7] x86/sgx: Use the actual zero page as the source when adding zero pages Sean Christopherson
2019-06-05 19:48 ` [PATCH 7/7] x86/sgx: Add a reserved field to sgx_enclave_add_region to drop 'packed' Sean Christopherson
2019-06-05 19:59   ` Dave Hansen
2019-06-05 20:00     ` Andy Lutomirski
2019-06-12 15:14   ` Jarkko Sakkinen
2019-06-12 15:23     ` Sean Christopherson
2019-06-13  0:44       ` Jethro Beekman
2019-06-13 15:38       ` Jarkko Sakkinen
2019-06-12 15:16 ` [PATCH 0/7] x86/sgx: Clean up and enhance add pages ioctl Jarkko Sakkinen
2019-06-12 18:14   ` Jarkko Sakkinen

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