similar to: Grant a partial page

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

This patch contains fixes for persistent grants implementation v2: * handle == 0 is a valid handle, so initialize grants in blkback setting the handle to BLKBACK_INVALID_HANDLE instead of 0. Reported by Konrad Rzeszutek Wilk. * new_map is a boolean, use "true" or "false" instead of 1 and 0. Reported by Konrad Rzeszutek Wilk. * blkfront announces the

From: Santosh Jodh <santosh.jodh at citrix.com> Add support for multi page ring for block devices. The number of pages is configurable for blkback via module parameter. blkback reports max-ring-page-order to blkfront via xenstore. blkfront reports its supported ring-page-order to blkback via xenstore. blkfront reports multi page ring references via ring-refNN in xenstore. The change allows

From: Santosh Jodh <santosh.jodh at citrix.com> Add support for multi page ring for block devices. The number of pages is configurable for blkback via module parameter. blkback reports max-ring-page-order to blkfront via xenstore. blkfront reports its supported ring-page-order to blkback via xenstore. blkfront reports multi page ring references via ring-refNN in xenstore. The change allows

From: Santosh Jodh <santosh.jodh at citrix.com> Add support for multi page ring for block devices. The number of pages is configurable for blkback via module parameter. blkback reports max-ring-page-order to blkfront via xenstore. blkfront reports its supported ring-page-order to blkback via xenstore. blkfront reports multi page ring references via ring-refNN in xenstore. The change allows

This patch implements persistent grants for the xen-blk{front,back} mechanism. The effect of this change is to reduce the number of unmap operations performed, since they cause a (costly) TLB shootdown. This allows the I/O performance to scale better when a large number of VMs are performing I/O. Previously, the blkfront driver was supplied a bvec[] from the request queue. This was granted to

Hi all I''m hacking on a netback trying to identify whether TLB flushes causes heavy performance penalty on Tx path. The hack is quite nasty (you would not want to know, trust me). Basically what is doesn''t is, 1) alter network protocol to pass along mfns instead of grant references, 2) when the backend sees a new mfn, map it RO and cache it in its own address space. With this

Hello, We are going to buy some NFS storage for 6-8 VMs on a single host, but want to expand to a second host. What storage recommendations would you give if you have between 2000 and 5000 USD? How about nexenta? what hardware would you use? any vendor? Experiences with openfiler and opennas? Thanks for the responses. Daniel -- +-=====---------------------------+ |

Hello, I want to change XEN source code after that I will copile it, and I will survey change''s effect. I have ubuntu 11.4 and centos 5.2. Which of the linux distributions is suitable for my job? thanks _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Greetings all. Some small question regarding schedule poll operation hypercall. 1. struct sched_poll poll.timeout is measured in what unit of time? Secs, ms? ns? 2. After issuing the hypercall_sched_op(SCHEDOP_poll, &poll); if no timeout is used in poll struct how long will I yield the CPU? 3. If I issue the hypercall and the event never comes is it possible to to yield the CPU for ever?

Not tested in any way. The original code for offload setting seems broken as it resets the features on every netback reconnect. This will set GSO_ROBUST at device creation time (earlier than connect time). RX checksum offload is forced on - so advertise as it is. Signed-off-by: Micha? Miros?aw <mirq-linux at rere.qmqm.pl> --- [I don't know Xen code enough to say this is correct. There

Not tested in any way. The original code for offload setting seems broken as it resets the features on every netback reconnect. This will set GSO_ROBUST at device creation time (earlier than connect time). RX checksum offload is forced on - so advertise as it is. Signed-off-by: Micha? Miros?aw <mirq-linux at rere.qmqm.pl> --- [I don't know Xen code enough to say this is correct. There

Not tested in any way. The original code for offload setting seems broken as it resets the features on every netback reconnect. This will set GSO_ROBUST at device creation time (earlier than connect time). RX checksum offload is forced on - so advertise as it is. Signed-off-by: Micha? Miros?aw <mirq-linux at rere.qmqm.pl> --- [I don't know Xen code enough to say this is correct. There

Netback and netfront only use one event channel to do tx / rx notification. This may cause unnecessary wake-up of process routines. This patch adds a new feature called feautre-split-event-channel to netback, enabling it to handle Tx and Rx event separately. Netback will use tx_irq to notify guest for tx completion, rx_irq for rx notification. If frontend doesn''t support this feature,

This is a cherry pick of two patches that add support for guest paged out frames in the XCP 2.6.32 dom0 patch queue. First patch propagates the ENOENT returned by the hypervisor in the case of a paged out page, all the way up the call chain to the MMAPBATCH_V2 ioctl. The ioctl is mainly used to harvest those return values and retry. The second patch adds retry loops to all backend grant

Hello, I am tryiong to set up a Dom0, right now my problem is creating the first guest. This is xen unstable tip ubuntu running jeremy kernel I have this: daniel@dani-ubuntu-xen:/usr/sbin$ sudo xm info [sudo] password for daniel: Error: Unable to connect to xend: No such file or directory. Is xend running? daniel@dani-ubuntu-xen:/usr/sbin$ Yet, xl reports this: daniel@dani-ubuntu-xen:/usr/sbin$

Dear list, This is the V4 of the trim support for xen-blkfront/blkback, Now we move BLKIF_OP_TRIM to BLKIF_OP_DISCARD, and dropped all "trim" stuffs in the patches, and use "discard" instead. Also we updated the helpers of blkif_x86_{32|64}_request or we will meet problems using a non-native protocol. And this patch has been tested with both SSD and raw file, with SSD we will

Hi, when user create the virtual machine, then: which code execute firstly, hvmloaer or qemu-dm?I have traced the codes flow and found qemu-dm run before hvmloader,right? And virtual bios code are both in hvmloader and qemu-dm, but I think it should be only one of virtual bios will be used to initialize the virutal device in qemu-dm.I find at the end of hvmloader it will jmp to 0xffff0, that

Hello List, I have a small problem with the ring when transferring blocks the id on the response is different from the request. This is the boot up read, count 0. The guest requests block 0, it has to be located at 7c00. I go ahead and create a REQUEST with this data: ring_req = RING_GET_REQUEST(priv,priv->req_prod_pvt); ring_req->id = 9; ring_req->nr_segments=1; ring_req->operation

When counting required slots for skb, netback directly uses DIV_ROUND_UP to get slots required by header data. This is wrong when offset in the page of header data is not zero, and is also inconsistent with following calculation for required slot in netbk_gop_skb. In netbk_gop_skb, required slots are calculated based on offset and len in page of header data. It is possible that required slots