From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Jethro Beekman <jethro@fortanix.com>
Cc: "linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>
Subject: Re: Bug in EPC paging
Date: Mon, 29 Jul 2019 07:56:38 -0700 [thread overview]
Message-ID: <20190729145638.GD21120@linux.intel.com> (raw)
In-Reply-To: <b1b95c9c-9191-64d4-37f3-7741cbb0c157@fortanix.com>
On Sat, Jul 27, 2019 at 11:16:01PM +0000, Jethro Beekman wrote:
> A user is reporting CPU soft lockup with Intel SDK version 2.1 and 2.5
> driver. This only happens when using SGX in conjunction with DPDK (Data
> Plane Development Kit) in the same process. The process is running two
> enclaves that together are bigger than the EPC.
>
> Dmesg output:
>
> 2.1 driver:
> https://github.com/YangZhou1997/dpdk-sgx-crash/blob/master/dmesg-full.log
>
> 2.5 driver: https://github.com/YangZhou1997/dpdk-sgx-crash/blob/master/dmesg-full-2.5.0.log
The log from 2.5 doesn't show any SGX activity, rather it's generating
remote TLB flushes during CoW. That would imply this is a generic remote
TLB flush (or SMP function call IPIs) issue and not an EPC bug.
>
> Enclave memory layout:
> https://github.com/YangZhou1997/dpdk-sgx-crash/blob/master/sgxs.info
>
> --
> Jethro Beekman | Fortanix
>
prev parent reply other threads:[~2019-07-29 14:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-27 23:16 Bug in EPC paging Jethro Beekman
2019-07-29 14:56 ` Sean Christopherson [this message]
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