Re: [Xen-devel] question regarding 2.6.18 backport

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2013-02-19 at 13:51 +0000, Andrew Jones wrote:
> Hi Ian,
> 
> I believe there's a problem with the 2.6.18 reference tree backport of
> 48856286b64e: "xen/netback: shutdown the ring if it contains garbage",
> which is c/s 1219. While the version in Linus' tree should be fine,
> as xen_netbk_tx_action runs in a kthread, the 2.6.18 version needs
> something different. In 2.6.18 net_tx_action is a tasklet, thus calling
> xenvif_carrier_off from it is problematic due to needing the rtnl
> mutex. A proposal I have that I haven't tried yet is for
> netbk_fatal_tx_err to schedule xenvif_carrier_off in a workqueue. This
> is a bit ugly though since the main point of xenvif_carrier_off is to
> queue linkwatch work. I'm wondering if you or anyone else have other
> suggestions.

Jan was looking into something of this nature, not sure wht the status
is though.

Ian.



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