From: Juergen Gross <jgross@suse.com>
To: Ian Jackson <Ian.Jackson@eu.citrix.com>,
Dario Faggioli <dario.faggioli@citrix.com>
Cc: xen-devel@lists.xensource.com, Wei Liu <wei.liu2@citrix.com>,
George Dunlap <george.dunlap@eu.citrix.com>,
Tim Deegan <tim@xen.org>, Jan Beulich <jbeulich@suse.com>
Subject: Re: [PATCH 3/3] xen: Document XEN_SYSCTL_CPUPOOL_OP_RMCPU anomalous EBUSY result
Date: Fri, 15 Apr 2016 16:34:24 +0200 [thread overview]
Message-ID: <5710FBF0.8090301@suse.com> (raw)
In-Reply-To: <22288.63208.629611.879273@mariner.uk.xensource.com>
On 15/04/16 16:12, Ian Jackson wrote:
> Dario Faggioli writes ("Re: [PATCH 3/3] xen: Document XEN_SYSCTL_CPUPOOL_OP_RMCPU anomalous EBUSY result"):
>> However, a different return value for the super special case of
>> temporary pinning override could maybe be selected. I'm having a look,
>> and although I don't find one that could be seen as a perfect fit (that
>> would be EBUSY, which is taken!), what about one of these:
>>
>> EEXIST 17 /* File exists */
>> ENOTEMPTY 39 /* Directory not empty */
>> EROFS 30 /* Read-only file system */
>> ENOSPC 28 /* No space left on device */
>
> Does the hypervisor currently use EAGAIN for anything ?
Yes. Especially XEN_SYSCTL_CPUPOOL_OP_RMCPU can return it already.
Before you are asking: Jan didn't want it to return EAGAIN in the
temporary pinning case as the hypervisor couldn't guarantee that
the situation will be resolved (opposed to the other usage of
EAGAIN).
Juergen
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next prev parent reply other threads:[~2016-04-15 14:34 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-14 17:07 [PATCH 0/3] Revert xc cpupool retries and document anomaly Ian Jackson
2016-04-14 17:07 ` [PATCH 1/3] libxc: Revert "do some retries in xc_cpupool_removecpu() for EBUSY case" Ian Jackson
2016-04-15 5:15 ` Juergen Gross
2016-04-15 7:46 ` Dario Faggioli
2016-04-14 17:07 ` [PATCH 2/3] xen: hypercall docs annotations for xen_sysctl_cpupool_op Ian Jackson
2016-04-14 20:37 ` Dario Faggioli
2016-04-15 10:27 ` Ian Jackson
2016-04-14 17:07 ` [PATCH 3/3] xen: Document XEN_SYSCTL_CPUPOOL_OP_RMCPU anomalous EBUSY result Ian Jackson
2016-04-14 17:24 ` Andrew Cooper
2016-04-14 17:56 ` Ian Jackson
2016-04-14 20:22 ` Dario Faggioli
2016-04-15 10:20 ` Ian Jackson
2016-04-15 10:43 ` Juergen Gross
2016-04-15 10:58 ` Dario Faggioli
2016-04-15 11:37 ` Juergen Gross
2016-04-15 13:20 ` Juergen Gross
2016-04-15 13:33 ` Dario Faggioli
2016-04-15 14:11 ` Ian Jackson
2016-04-15 14:39 ` Juergen Gross
2016-04-15 5:35 ` Juergen Gross
2016-04-15 7:42 ` Dario Faggioli
2016-04-15 14:12 ` Ian Jackson
2016-04-15 14:17 ` Konrad Rzeszutek Wilk
2016-04-15 14:34 ` Juergen Gross [this message]
2016-04-15 14:44 ` Ian Jackson
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