linux/linux-stable.git - Linux kernel stable tree

Age	Commit message (Collapse)	Author
2015-08-20	xen: remove no longer needed p2m.h	Juergen Gross
	Cleanup by removing arch/x86/xen/p2m.h as it isn't needed any more. Most definitions in this file are used in p2m.c only. Move those into p2m.c. set_phys_range_identity() is already declared in arch/x86/include/asm/xen/page.h, add __init annotation there. MAX_REMAP_RANGES isn't used at all, just delete it. The only define left is P2M_PER_PAGE which is moved to page.h as well. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Konrad Rzeszutek Wilk <Konrad.wilk@oracle.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2014-09-23	xen/setup: Remap Xen Identity Mapped RAM	Matt Rushton
	Instead of ballooning up and down dom0 memory this remaps the existing mfns that were replaced by the identity map. The reason for this is that the existing implementation ballooned memory up and and down which caused dom0 to have discontiguous pages. In some cases this resulted in the use of bounce buffers which reduced network I/O performance significantly. This change will honor the existing order of the pages with the exception of some boundary conditions. To do this we need to update both the Linux p2m table and the Xen m2p table. Particular care must be taken when updating the p2m table since it's important to limit table memory consumption and reuse the existing leaf pages which get freed when an entire leaf page is set to the identity map. To implement this, mapping updates are grouped into blocks with table entries getting cached temporarily and then released. On my test system before: Total pages: 2105014 Total contiguous: 1640635 After: Total pages: 2105014 Total contiguous: 2098904 Signed-off-by: Matthew Rushton <mrushton@amazon.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>