From: David Vrabel <david.vrabel@citrix.com>
To: Ian Jackson <Ian.Jackson@eu.citrix.com>
Cc: Keir Fraser <keir@xen.org>,
Ian Campbell <ian.campbell@citrix.com>,
Jan Beulich <jbeulich@suse.com>,
xen-devel@lists.xen.org
Subject: Re: [PATCH 11/11] libxl, xl: add event_channels option to xl configuration file
Date: Mon, 14 Oct 2013 17:43:15 +0100 [thread overview]
Message-ID: <525C1F23.1050807@citrix.com> (raw)
In-Reply-To: <21084.63.574310.816920@mariner.uk.xensource.com>
On 14/10/13 15:31, Ian Jackson wrote:
> David Vrabel writes ("[PATCH 11/11] libxl,xl: add event_channels option to xl configuration file"):
>> +=item B<max_event_channels=N>
>> +
>> +Limit the guest to using at most N event channels (PV interrupts).
>> +Guests use hypervisor resources for each event channel they use.
>> +
>> +The default of 1023 should be sufficient for typical guests. The
>> +maximum value depends what the guest supports. Guests supporting the
>> +FIFO-based event channel ABI support up to 131,071 event channels.
>> +Other guests are limited to 4095 (64-bit x86 and ARM) or 1023 (32-bit
>> +x86).
>
> It's not clear to me what happens if you specify a larger value for
> max_event_channels than the guest and/or hypervisor support.
The guest is limited to the minimum of:
- what it supports
- what the hypervisor support
- what max_event_channels is set to.
The docs should be clarified to say this.
David
next prev parent reply other threads:[~2013-10-14 16:43 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-02 16:35 [PATCHv5 0/11] Xen: FIFO-based event channel ABI David Vrabel
2013-10-02 16:35 ` [PATCH 01/11] debug: remove some event channel info from the 'i' and 'q' debug keys David Vrabel
2013-10-02 16:35 ` [PATCH 02/11] evtchn: refactor low-level event channel port ops David Vrabel
2013-10-02 16:35 ` [PATCH 03/11] evtchn: print ABI specific state with the 'e' debug key David Vrabel
2013-10-02 16:35 ` [PATCH 04/11] evtchn: use a per-domain variable for the max number of event channels David Vrabel
2013-10-02 16:35 ` [PATCH 05/11] evtchn: allow many more evtchn objects to be allocated per domain David Vrabel
2013-10-02 16:35 ` [PATCH 06/11] evtchn: add FIFO-based event channel ABI David Vrabel
2013-10-02 16:35 ` [PATCH 07/11] evtchn: implement EVTCHNOP_set_priority and add the set_priority hook David Vrabel
2013-10-02 16:35 ` [PATCH 08/11] evtchn: add FIFO-based event channel hypercalls and port ops David Vrabel
2013-10-04 16:00 ` Jan Beulich
2013-10-02 16:35 ` [PATCH 09/11] xen: Add DOMCTL to limit the number of event channels a domain may use David Vrabel
2013-10-02 17:06 ` David Vrabel
2013-10-04 11:56 ` David Vrabel
2013-10-04 16:02 ` Jan Beulich
2013-10-07 16:00 ` Daniel De Graaf
2013-10-02 16:35 ` [PATCH 10/11] libxc: add xc_domain_set_max_evtchn() David Vrabel
2013-10-02 16:36 ` [PATCH 11/11] libxl, xl: add event_channels option to xl configuration file David Vrabel
2013-10-03 8:29 ` Ian Campbell
2013-10-14 14:31 ` Ian Jackson
2013-10-14 16:43 ` David Vrabel [this message]
2013-10-14 16:58 ` Ian Jackson
-- strict thread matches above, loose matches on Subject: below --
2013-09-27 10:55 [PATCHv4 0/11] Xen: FIFO-based event channel ABI David Vrabel
2013-09-27 10:55 ` [PATCH 11/11] libxl, xl: add event_channels option to xl configuration file David Vrabel
2013-10-01 12:36 ` Ian Campbell
2013-10-01 12:53 ` David Vrabel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=525C1F23.1050807@citrix.com \
--to=david.vrabel@citrix.com \
--cc=Ian.Jackson@eu.citrix.com \
--cc=ian.campbell@citrix.com \
--cc=jbeulich@suse.com \
--cc=keir@xen.org \
--cc=xen-devel@lists.xen.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).