xen/xen - xen

	Commit message (Collapse)	Author	Age	Files	Lines
*	x86/mm: New sharing audit memop	Andres Lagar-Cavilla	2012-02-10	1	-0/+11
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	Remove costly mem_sharing audits from the inline path, and instead make them callable as a memop. Have the audit function return the number of errors detected. Update memshrtool to be able to trigger audits. Set sharing audits as enabled by default. Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org> Signed-off-by: Adin Scannell <adin@scannell.ca> Acked-by: Tim Deegan <tim@xen.org> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Tim Deegan <tim@xen.org>
*	Use memops for mem paging, sharing, and access, instead of domctls	Andres Lagar-Cavilla	2012-02-10	1	-2/+2
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	Per page operations in the paging, sharing, and access tracking subsystems are all implemented with domctls (e.g. a domctl to evict one page, or to share one page). Under heavy load, the domctl path reveals a lack of scalability. The domctl lock serializes dom0's vcpus in the hypervisor. When performing thousands of per-page operations on dozens of domains, these vcpus will spin in the hypervisor. Beyond the aggressive locking, an added inefficiency of blocking vcpus in the domctl lock is that dom0 is prevented from re-scheduling any of its other work-starved processes. We retain the domctl interface for setting up and tearing down paging/sharing/mem access for a domain. But we migrate all the per page operations to use the memory_op hypercalls (e.g XENMEM_*). Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla> Signed-off-by: Adin Scannell <adin@scannell.ca> Acked-by: Tim Deegan <tim@xen.org> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Tim Deegan <tim@xen.org>
*	tools: memshrtool: tool to test and exercise the sharing subsystem	Andres Lagar-Cavilla	2012-01-27	2	-0/+191
	This is demo code meant to showcase how to perform sharing operations. It is useful for testing. [ Added appropriate lines to .hgignore and .gitignore -iwj ] Signed-off-by: Adin Scannell <adin@scannell.ca> Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org> Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>