search for: ring_page

The following two patches allow the parallel use of memsharing, xenpaging and xen-access by using an independent ring buffer for each feature. Please review. v2: - update mem_event_check_ring arguments, check domain rather than domain_id - check ring_full first because its value was just evaluated - check if ring buffer is initialized before calling mem_access_domctl/mem_paging_domctl

...-167,9 +169,68 @@ int xc_wait_for_event_or_timeout(xc_inte return -errno; } +int xenaccess_teardown(xc_interface *xch, xenaccess_t *xenaccess) +{ + int rc; + + if ( xenaccess == NULL ) + return 0; + + /* Tear down domain xenaccess in Xen */ + if ( xenaccess->mem_event.ring_page ) + munmap(xenaccess->mem_event.ring_page, PAGE_SIZE); + + if ( mem_access_enable ) + { + rc = xc_mem_access_disable(xenaccess->xc_handle, + xenaccess->mem_event.domain_id); + if ( rc != 0 ) + { + ERROR("Er...

...mm/mem_event.c Fri Feb 17 15:14:25 2012 +0800 @@ -243,6 +243,9 @@ return -EBUSY; } + /* Free domU''s event channel and leave the other one unbound */ + free_xen_event_channel(d->vcpu[0], med->xen_port); + unmap_domain_page(med->ring_page); med->ring_page = NULL; --===============7093614109929523318== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@list...

hi, How can I get corresponding shadowed page number of a virtual address in vm? -- Best Regards, Mohamad Rezaei

...lktap-dkms/+bug/1245009 VM_RESERVED is deprecated as of 3.7. Building with the patch described in that bug allows for blktap to build properly. Diff for reference: --- ring.c.orig 2013-10-26 23:53:39.300000000 +0900 +++ ring.c 2013-10-26 20:35:26.301000000 +0900 @@ -39,6 +39,10 @@ */ #define RING_PAGES 1 +#ifndef VM_RESERVED +# define VM_RESERVED (VM_DONTEXPAND | VM_DONTDUMP) +#endif + #define BLKTAP_INFO_SIZE_AT(_memb) \ offsetof(struct blktap_device_info, _memb) + \ sizeof(((struct blktap_device_info*)0)->_memb) -- System Information: Debian Release: jessie/sid APT prefers testin...

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.

ging_prep ensures that an mfn is backing the paged-out gfn, and transitions to the next state in the paging state machine for this page. Foreign mappings of the gfn will now succeed. This is the key idea, as it allows the pager to now map the gfn and fill in its contents. Unfortunately, it also allows any other foreign mapper to map the gfn and read its contents. This is particularly dangerous

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.

...ruct PVSCSIRingsState *rings_state; > + dma_addr_t ringStatePA; > + > + struct pci_dev *dev; > + struct Scsi_Host *host; > + > + struct list_head cmd_pool; > + struct pvscsi_ctx *cmd_map; > +}; > + > + > +/* Command line parameters */ > +static int pvscsi_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_PER_RING; > +static int pvscsi_msg_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_MSG_RING; > +static int pvscsi_cmd_per_lun = PVSCSI_DEFAULT_QUEUE_DEPTH; > +static bool pvscsi_disable_msi; > +static bool pvscsi_disable_msix; > +static bool pvscsi_use_msg...

...ruct PVSCSIRingsState *rings_state; > + dma_addr_t ringStatePA; > + > + struct pci_dev *dev; > + struct Scsi_Host *host; > + > + struct list_head cmd_pool; > + struct pvscsi_ctx *cmd_map; > +}; > + > + > +/* Command line parameters */ > +static int pvscsi_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_PER_RING; > +static int pvscsi_msg_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_MSG_RING; > +static int pvscsi_cmd_per_lun = PVSCSI_DEFAULT_QUEUE_DEPTH; > +static bool pvscsi_disable_msi; > +static bool pvscsi_disable_msix; > +static bool pvscsi_use_msg...

...ng; + unsigned msg_pages; + dma_addr_t msgRingPA; + + struct PVSCSIRingsState *rings_state; + dma_addr_t ringStatePA; + + struct pci_dev *dev; + struct Scsi_Host *host; + + struct list_head cmd_pool; + struct pvscsi_ctx *cmd_map; +}; + + +/* Command line parameters */ +static int pvscsi_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_PER_RING; +static int pvscsi_msg_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_MSG_RING; +static int pvscsi_cmd_per_lun = PVSCSI_DEFAULT_QUEUE_DEPTH; +static bool pvscsi_disable_msi; +static bool pvscsi_disable_msix; +static bool pvscsi_use_msg = true; + +#define PV...

...ng; + unsigned msg_pages; + dma_addr_t msgRingPA; + + struct PVSCSIRingsState *rings_state; + dma_addr_t ringStatePA; + + struct pci_dev *dev; + struct Scsi_Host *host; + + struct list_head cmd_pool; + struct pvscsi_ctx *cmd_map; +}; + + +/* Command line parameters */ +static int pvscsi_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_PER_RING; +static int pvscsi_msg_ring_pages = PVSCSI_DEFAULT_NUM_PAGES_MSG_RING; +static int pvscsi_cmd_per_lun = PVSCSI_DEFAULT_QUEUE_DEPTH; +static bool pvscsi_disable_msi; +static bool pvscsi_disable_msix; +static bool pvscsi_use_msg = true; + +#define PV...

Patrick, there following patches fix xenpaging for me. Granttable handling is incomplete. If a page is gone, a GNTST_eagain should be returned to the caller to inidcate the hypercall has to be retried after a while, until the page is available again. Please review. Olaf _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com