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Date:   Fri, 12 Apr 2019 10:10:41 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH 1/1] xen-netback: add reference from xenvif to
 backend_info to facilitate coredump analysis

From: Dongli Zhang <>
Date: Fri, 12 Apr 2019 14:53:24 +0800

> During coredump analysis, it is not easy to obtain the address of
> backend_info in xen-netback.
> So far there are two ways to obtain backend_info:
> 1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
> and then derive it from dev_get_drvdata().
> 2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
> or frontend_changed()).
> This patch adds a reference from xenvif to backend_info so that it would be
> much more easier to obtain backend_info during coredump analysis.
> Signed-off-by: Dongli Zhang <>

Applied to net-next.

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