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Date: Thu, 2 Jan 2014 14:17:21 -0500 From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> To: David Vrabel <david.vrabel@...rix.com> Cc: xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org, annie.li@...cle.com, msw@...zon.com Subject: Re: [Xen-devel] [PATCH] xen/grant-table: Force to use v1 of grants. On Thu, Jan 02, 2014 at 02:54:18PM +0000, David Vrabel wrote: > On 31/12/13 15:15, Konrad Rzeszutek Wilk wrote: > > We have the framework to use v2, but there are no backends that > > actually use it. The end result is that on PV we use v2 grants > > and on PVHVM v1. The v1 has a capacity of 512 grants per page while > > the v2 has 256 grants per page. This means we lose about 50% > > capacity - and if we want more than 16 VIFs (each VIF takes > > 512 grants), then we are hitting the max per guest of 32. > > > > Oracle-bug: 16039922 > > CC: annie.li@...cle.com > > CC: msw@...zon.com > > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> > > Reviewed-by: David Vrabel <david.vrabel@...rix.com> > > What does v2 add anyway? Do we want to remove all v2 related code or are Better status reporting page and two extra types of grants. > we expecting to make use of it in the near future? Yes, that is my understanding. > > David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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