From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Yoni Gilad <Yonig@radcom.com>
Cc: dev@dpdk.org, Huawei Xie <huawei.xie@intel.com>,
Yuanhan Liu <yuanhan.liu@linux.intel.com>
Subject: Re: virtio: crash when using multiple processes (16.04 regression)
Date: Thu, 19 May 2016 18:43:19 +0200 [thread overview]
Message-ID: <5703424.Nz7AfLLfu1@xps13> (raw)
In-Reply-To: <DB3PR05MB4919295860E52A070C06A87D54A0@DB3PR05MB491.eurprd05.prod.outlook.com>
2016-05-19 16:20, Yoni Gilad:
> We have encountered a crash in virtio_xmit_pkts (specifically, in the call to virtqueue_notify) when running DPDK in a multi-process setup. This is a regression in DPDK 16.04.
Thanks a lot for reporting.
2 tips to improve such bug report:
- Send it to the maintainer of virtio (and cc this list).
You can find them in the MAINTAINERS file. I've cc'ed them.
- Try to test early the release candidates to have it fixed before
the bug is really released.
> The culprit seems to be the field vtpci_ops in the virtio_hw structure. This field is stored in shared memory, but points to a struct in the primary process's address space. If the same struct was loaded in a different address in the secondary process, it will lead to a crash or other issues when this field is dereferenced there. The referenced virtio_pci_ops struct contains function pointers, which can also be different in the secondary process.
next prev parent reply other threads:[~2016-05-19 16:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-19 16:20 virtio: crash when using multiple processes (16.04 regression) Yoni Gilad
2016-05-19 16:43 ` Thomas Monjalon [this message]
2016-05-23 13:36 ` Yuanhan Liu
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