From: Paul Durrant <Paul.Durrant@citrix.com>
To: 'Jan Beulich' <jbeulich@suse.com>,
Andrew Cooper <Andrew.Cooper3@citrix.com>
Cc: Juergen Gross <jgross@suse.com>,
"sstabellini@kernel.org" <sstabellini@kernel.org>,
Wei Liu <wei.liu2@citrix.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
"julien.grall@arm.com" <julien.grall@arm.com>,
Roger Pau Monne <roger.pau@citrix.com>
Subject: Re: [PATCH RFC] xen/evtchn: Implement EVTCHNOP_send_imm as a companian to EVTCHNOP_send
Date: Fri, 14 Jul 2017 07:35:58 +0000 [thread overview]
Message-ID: <b354f36d42b24edca97c99ece3d5155a@AMSPEX02CL01.citrite.net> (raw)
In-Reply-To: <5967CBB40200007800102504@prv-mh.provo.novell.com>
> -----Original Message-----
> From: Xen-devel [mailto:xen-devel-bounces@lists.xen.org] On Behalf Of Jan
> Beulich
> Sent: 13 July 2017 21:36
> To: Andrew Cooper <Andrew.Cooper3@citrix.com>
> Cc: Juergen Gross <jgross@suse.com>; sstabellini@kernel.org; Wei Liu
> <wei.liu2@citrix.com>; xen-devel@lists.xen.org; julien.grall@arm.com;
> Roger Pau Monne <roger.pau@citrix.com>
> Subject: Re: [Xen-devel] [PATCH RFC] xen/evtchn: Implement
> EVTCHNOP_send_imm as a companian to EVTCHNOP_send
>
> >>> Andrew Cooper <andrew.cooper3@citrix.com> 07/13/17 9:50 AM >>>
> >RFC: is it worth converting the close, unmask, reset (and possibly
> >expand_array) as well?
>
> I can't see close and even more so reset to be performance critical.
> Unmask otoh may be (depending on use); no sure about expand_array.
>
IIRC the unmask hypercall only needs to be made in certain circumstances when direct unmasking of the fifo structure might race (can't remember the detail offhand), but it still seems like a reasonable target for an immediate argument.
Paul
> Jan
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> https://lists.xen.org/xen-devel
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next prev parent reply other threads:[~2017-07-14 7:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-13 7:50 [PATCH RFC] xen/evtchn: Implement EVTCHNOP_send_imm as a companian to EVTCHNOP_send Andrew Cooper
2017-07-13 9:44 ` Paul Durrant
2017-07-13 10:14 ` Juergen Groß
2017-07-13 12:04 ` Wei Liu
2017-07-13 19:36 ` Jan Beulich
2017-07-14 7:35 ` Paul Durrant [this message]
2017-07-14 10:57 ` Jan Beulich
2017-07-17 18:30 ` Stefano Stabellini
2017-07-17 22:54 ` Andrew Cooper
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