linux-kernel - [PATCH 0/6] xen: don't call vmalloc_sync

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Message-ID: <1316090411-22608-1-git-send-email-david.vrabel@citrix.com>
Date:	Thu, 15 Sep 2011 13:40:05 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	xen-devel@...ts.xensource.com
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	linux-kernel@...r.kernel.org,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: [PATCH 0/6] xen: don't call vmalloc_sync_all() when mapping foreign pages

This set of pages avoids the need to call vmalloc_sync_all() when
mapping foreign pages.  Two new functions are adding for mapping
foreign pages onto RAM pages instead of vmalloc space.

This does waste a page of RAM for each mapped page.  In the future a
ballooned page could be used instead (once the API for getting a
ballooned page with the right GFP flags is available).

David

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