From: Ian Campbell <Ian.Campbell@citrix.com>
To: David Vrabel <david.vrabel@citrix.com>
Cc: xen-devel@lists.xenproject.org,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Jenny Herbert <jennifer.herbert@citrix.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: [PATCH 08/12] xen/grant-table: add a mechanism to safely unmap pages that are in use
Date: Wed, 7 Jan 2015 13:33:09 +0000 [thread overview]
Message-ID: <1420637589.18631.87.camel@citrix.com> (raw)
In-Reply-To: <54AD3504.60100@citrix.com>
On Wed, 2015-01-07 at 13:30 +0000, David Vrabel wrote:
> On 07/01/15 13:24, Ian Campbell wrote:
> > On Wed, 2015-01-07 at 13:07 +0000, David Vrabel wrote:
> >
> >> We don't use this safe unmap mechanism for netback because the zero copy
> >> stuff means we don't need it and the polling on the unmap is high
> >> latency and only good enough if the polling is needed very rarely.
> >
> > I'd think it should be rare for netback too unless your network is made
> > of wet string.
>
> Hmmm. Yes, this might be worth looking at but I would prefer to do it
> to it as a follow up to this series.
Sure.
next prev parent reply other threads:[~2015-01-07 13:33 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-06 18:57 [RFC PATCH 00/12] xen: fix many long-standing grant mapping bugs David Vrabel
2015-01-06 18:57 ` [PATCH 01/12] mm: allow for an alternate set of pages for userspace mappings David Vrabel
2015-01-06 18:57 ` [PATCH 02/12] mm: add 'foreign' alias for the 'pinned' page flag David Vrabel
2015-01-07 17:12 ` Konrad Rzeszutek Wilk
2015-01-06 18:57 ` [PATCH 03/12] xen/grant-table: pre-populate kernel unmap ops for xen_gnttab_unmap_refs() David Vrabel
2015-01-06 18:57 ` [PATCH 04/12] xen: remove scratch frames for ballooned pages and m2p override David Vrabel
2015-01-06 18:57 ` [PATCH 05/12] x86/xen: require ballooned pages for grant maps David Vrabel
2015-01-06 18:57 ` [PATCH 06/12] xen: mark grant mapped pages as foreign David Vrabel
2015-01-07 11:53 ` Ian Campbell
2015-01-09 16:03 ` Stefano Stabellini
2015-01-09 16:19 ` Ian Campbell
2015-01-09 16:39 ` David Vrabel
2015-01-09 16:46 ` Stefano Stabellini
2015-01-09 16:47 ` Ian Campbell
2015-01-06 18:57 ` [PATCH 07/12] xen-netback: use foreign page information from the pages themselves David Vrabel
2015-01-07 11:57 ` Ian Campbell
2015-01-06 18:57 ` [PATCH 08/12] xen/grant-table: add a mechanism to safely unmap pages that are in use David Vrabel
2015-01-07 12:00 ` Ian Campbell
2015-01-07 12:06 ` Ian Campbell
2015-01-07 13:07 ` David Vrabel
2015-01-07 13:24 ` Ian Campbell
2015-01-07 13:30 ` David Vrabel
2015-01-07 13:33 ` Ian Campbell [this message]
2015-01-09 16:11 ` Stefano Stabellini
2015-01-06 18:57 ` [PATCH 09/12] xen/gntdev: safely unmap grants in case they are still " David Vrabel
2015-01-06 18:57 ` [PATCH 10/12] xen-blkback: " David Vrabel
2015-01-06 18:57 ` [PATCH 11/12] xen/gntdev: mark userspace PTEs as special on x86 PV guests David Vrabel
2015-01-07 12:11 ` Ian Campbell
2015-01-07 13:23 ` David Vrabel
2015-01-07 13:32 ` Ian Campbell
2015-01-06 18:57 ` [PATCH 12/12] xen/gntdev: provide a set of pages for each VMA David Vrabel
2015-01-09 15:55 ` Stefano Stabellini
2015-01-09 16:05 ` Stefano Stabellini
2015-01-09 16:41 ` David Vrabel
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