Re: Deadlock in /proc/xen/xenbus watch+read on 3.17+ (maybe earlier)

[David Vrabel <david.vrabel@citrix.com>]

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