Re: [Xen-devel] Deadlock in /proc/xen/xenbus watch+read on 3.17+ (maybe earlier)

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 19/03/15 01:19, Marek Marczykowski-Górecki wrote:
> Hi,
> 
> I've hit some deadlock in kernel xenstore client exposed via
> /proc/xen/xenbus. Steps to reproduce are simple:
> int main() {
>       struct xs_handle *xs;
>       xs = xs_open(0);
>       xs_watch(xs, "domid", "token");
>       xs_read(xs, 0, "name", NULL);
>       return 0;
> }

This test program works for me on 4.0-rc4 in a dom0 and domU.  I also
don't see any xenbus changes in the kernel that could cause a regression
like this.

Perhaps you not running a vanilla kernel?

David

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