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Message-ID: <55B60583.3010903@citrix.com> Date: Mon, 27 Jul 2015 11:18:43 +0100 From: David Vrabel <david.vrabel@...rix.com> To: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, David Vrabel <david.vrabel@...rix.com> CC: <xen-devel@...ts.xenproject.org>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Daniel Kiper <daniel.kiper@...cle.com>, <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org> Subject: Re: [Xen-devel] [PATCHv2 08/10] xen/balloon: use hotplugged pages for foreign mappings etc. On 24/07/15 19:55, Konrad Rzeszutek Wilk wrote: > On Fri, Jul 24, 2015 at 12:47:46PM +0100, David Vrabel wrote: >> alloc_xenballooned_pages() is used to get ballooned pages to back >> foreign mappings etc. Instead of having to balloon out real pages, >> use (if supported) hotplugged memory. >> >> This makes more memory available to the guest and reduces >> fragmentation in the p2m. >> >> If userspace is lacking a udev rule (or similar) to online hotplugged > > Is that udev rule already in distros? Not all, which makes me think that this behaviour should be enabled by userspace (via a module parameter). This would also allow me to drop the timeout and fallback path which I put in to handle the no udev rule case. 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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