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# HG changeset patch # User hongkaixing<hongkaixing@huawei.com> # Date 1325149704 -28800 # Node ID 052727b8165ce6e05002184ae894096214c8b537 # Parent 54a5e994a241a506900ee0e197bb42e5f1d8e759 xenpaging:add a new array to speed up page-in in xenpaging This patch adds a new array named page_out_index to reserve the victim''s...

...crease in this case;After the paging process is terminated, the p2mt p2m_ram_paging_in still remains in p2m table.Once domU accesses the nominated page,it will result in BSOD or vm''stuck. The patch adds the dealing of this request to resume the page before xenpaging is ended. Signed-off-byhongkaixing<hongkaixing@huawei.com>,shizhen<bicky.shi@huawei.com> diff -r 9f4640e40d4f -r 68eae0b487ae tools/xenpaging/xenpaging.c --- a/tools/xenpaging/xenpaging.c Thu Feb 09 16:50:52 2012 +0800 +++ b/tools/xenpaging/xenpaging.c Thu Feb 09 16:58:01 2012 +0800 @@ -911,7 +911,7 @@...

The following two patches are about how to speed up in xenpaging when page in pages. On suse11-64 with 4G memory,if we page out 2G pages,it will cost about 15.5 seconds, but take 2088 seconds to finish paging in.If page-in costs too much time,it will cause unmesurable problems when vm or dom0 access the paged_out page,such as BSOD,crash. What鈥檚 more,the dom0 is always in high I/O pressure.

...y xc_evtchn_unbind(), leaves domU''s port still occupied. So we add the patch to free domU''s port when xenpaging exits. We need double free interdomain eventchannel. First free domainU port, and leave domain 0 port unbond, Then free domain 0 port. Signed-off-byKaixing Hong <hongkaixing@huawei.com>, Signed-off-byZhen Shi <bicky.shi@huawei.com> diff -r b75664e53905 -r 9fd12f919ddb xen/arch/x86/mm/mem_event.c --- a/xen/arch/x86/mm/mem_event.c Thu Feb 16 15:43:02 2012 +0000 +++ b/xen/arch/x86/mm/mem_event.c Fri Feb 17 15:14:25 2012 +0800 @@ -243,6 +243,9 @@ ret...

There has been some progress, but still no joy. Definitely not intended for inclusion at this point. Tim, Wei, I added a Xen command line toggle to disable IOMMU and P2M table sharing. Tim, I verified that changes to p2m-pt.c don''t break shadow mode (64bit hypervisor and Win 7 guest). Hongkaixing, I incorporated your suggestion in patch 2, so I should add your Signed-off-by eventually. Please review. Olaf, I do not see errors when mapping pages prior to eviction. Let me know how it goes for you. If I unleash xenpaging on a domain for a non-ambitious target (64 MiBs paged out for one minut...

Hi, Olaf we have tested the xenpaging feature and found some problems. (1) the test case like this : when we start a VM with POD enable, the xenpaging is started at the same time. this case will cause many problems ,finally, we fixed the BUG, the patch is attached below. (2) there is a very serious problem. we have observed many VM crash examples, the error code is not always the same.

Hello, Recently many advanced memory mechanisms are introduced into Xen. One problem we found is the conflict between p2m query and setting. For example, backend drivers always map domU’s page to its own space, during the mapping procedure, situations as follow may happen, when mfn is obtained by gfn_to_mfn(), this mfn is likely to be paged out. first case: grant mapping

...ine version: xen 9fc810bb8145 ------------------------------------------------------------ People who touched revisions under test: Alex Zeffertt <alex.zeffertt@eu.citrix.com> Daniel De Graaf <dgdegra@tycho.nsa.gov> Diego Ongaro <diego.ongaro@citrix.com> hongkaixing <hongkaixing@huawei.com> Ian Campbell <ian.campbell@citrix.com> Ian Jackson <ian.jackson@eu.citrix.com> Jan Beulich <jbeulich@suse.com> John McDermott <john.mcdermott@nrl.navy.mil> Keir Fraser <keir@xen.org> Olaf Hering <olaf@aepfle.de> Samuel...