linux-kernel - Re: [PATCH v3 3/3] xen: optimize xenbus driver for multiple concurrent xenstore accesses

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Message-ID: <12bbe7e7-eea4-09d0-8282-0b04504daeb2@suse.com>
Date:   Tue, 24 Jan 2017 17:23:08 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Subject: Re: [PATCH v3 3/3] xen: optimize xenbus driver for multiple
 concurrent xenstore accesses

On 24/01/17 14:47, Boris Ostrovsky wrote:
> On 01/23/2017 01:59 PM, Boris Ostrovsky wrote:
>> On 01/23/2017 05:09 AM, Juergen Gross wrote:
>>> Handling of multiple concurrent Xenstore accesses through xenbus driver
>>> either from the kernel or user land is rather lame today: xenbus is
>>> capable to have one access active only at one point of time.
>>>
>>>
> 
> 
> This patch appears to break save/restore:

Hmm, tried multiple times, but I can't reproduce this issue.

Anything special in the setup? I tried a 64 bit pv guest and did
"xl save".

Do I have to run some load in parallel?


Juergen