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xen-devel
RE: [Xen-devel] Re: [PATCH] libxl: fix xenstore connection when run in d
Hi,
I don't think it is a good idea to let users decide which "open". If we check
if it is in Dom0, it uses xs_daemon_open; if in DomU, it uses xs_domain_open.
Is it better?
If it is always preferring xs_domain_open, the performance is not better than
that of xs_daemon_open when running in Dom0.
Jun Zhu
Citrix Systems UK
________________________________________
From: Ian Campbell
Sent: Tuesday, August 31, 2010 5:15 AM
To: Jun Zhu (Intern)
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; dgdegra@xxxxxxxxxxxxx
Subject: Re: [Xen-devel] Re: [PATCH] libxl: fix xenstore connection when run in
domU
On Tue, 2010-08-31 at 10:05 +0100, Jun Zhu (Intern) wrote:
> Hi
>
> There are other places that use the xs_daemon_open in libxl. Is it necessory
> to change them as follows?
> ctx->xsh = xs_daemon_open();
> + if (!ctx->xsh)
> + ctx->xsh = xs_domain_open();
> if (!ctx->xsh) {
> XL_LOG_ERRNOVAL(ctx, XL_LOG_ERROR, errno,
> "cannot connect to xenstore");
I think we'd be better off introducing "libxl__xs_open" which does the
right thing and make the users to all use it.
Is there any harm in always preferring xs_domain_open, even if the
xenstore daemon happens to be co-located in the same domain?
Ian.
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