From: Bob Liu <bob.liu@oracle.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
xen-devel <xen-devel@lists.xen.org>,
Wei Liu <wei.liu2@citrix.com>,
David Vrabel <david.vrabel@citrix.com>,
Ian Campbell <ian.campbell@citrix.com>
Subject: Re: netfront/netback multiqueue exhausting grants
Date: Fri, 22 Jan 2016 18:40:22 +0800 [thread overview]
Message-ID: <56A20716.9090607@oracle.com> (raw)
In-Reply-To: <56A1EE2102000078000C9E13@prv-mh.provo.novell.com>
On 01/22/2016 03:53 PM, Jan Beulich wrote:
>>>> On 22.01.16 at 04:36, <bob.liu@oracle.com> wrote:
>> By the way, do you think it's possible to make grant table support bigger
>> page e.g 64K?
>> One grant-ref per 64KB instead of 4KB, this should able to reduce the grant
>> entry consumption significantly.
>
> How would that work with an underlying page size of 4k, and pages
> potentially being non-contiguous in machine address space? Besides
> that the grant table hypercall interface isn't prepared to support
> 64k page size, due to its use of uint16_t for the length of copy ops.
>
Right, and I mean whether we should consider address all the place as your mentioned.
With multi-queue xen-block and xen-network, we got more reports that the grants were exhausted.
--
Regards,
-Bob
next prev parent reply other threads:[~2016-01-22 10:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-20 12:23 netfront/netback multiqueue exhausting grants Ian Campbell
2016-01-20 14:40 ` Boris Ostrovsky
2016-01-20 14:52 ` Ian Campbell
2016-01-20 15:02 ` David Vrabel
2016-01-20 15:10 ` Boris Ostrovsky
2016-01-20 15:16 ` Ian Campbell
2016-01-21 10:12 ` Ian Campbell
2016-01-21 10:25 ` Wei Liu
2016-01-21 10:37 ` Ian Campbell
2016-01-21 10:52 ` Wei Liu
2016-01-20 16:18 ` annie li
2016-01-21 10:56 ` David Vrabel
2016-01-21 12:19 ` Ian Campbell
2016-01-21 14:17 ` David Vrabel
2016-01-21 15:11 ` annie li
2016-01-22 3:36 ` Bob Liu
2016-01-22 7:53 ` Jan Beulich
2016-01-22 10:40 ` Bob Liu [this message]
2016-01-22 11:02 ` Jan Beulich
2016-01-23 0:29 ` Bob Liu
2016-01-25 9:53 ` Jan Beulich
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