search for: gnttab_set_map_op

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

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

.../gntdev.c +++ b/drivers/xen/gntdev.c @@ -204,7 +204,8 @@ static int find_grant_ptes(pte_t *pte, pgtable_t token, unsigned long addr, void BUG_ON(pgnr >= map->count); pte_maddr = (u64)pfn_to_mfn(page_to_pfn(token)) << PAGE_SHIFT; pte_maddr += (unsigned long)pte & ~PAGE_MASK; - gnttab_set_map_op(&map->map_ops[pgnr], pte_maddr, map->flags, + gnttab_set_map_op(&map->map_ops[pgnr], pte_maddr, + GNTMAP_contains_pte | map->flags, map->grants[pgnr].ref, map->grants[pgnr].domid); gnttab_set_unmap_op(&map->unmap_ops[pgnr], pte_maddr, map->flags...

...e <linux/delay.h> +#include <linux/vmalloc.h> static kmem_cache_t *blkif_cachep; @@ -55,75 +55,39 @@ blkif_t *blkif_alloc(domid_t domid) return blkif; } -static int map_frontend_page(blkif_t *blkif, unsigned long shared_page) -{ - struct gnttab_map_grant_ref op; - int ret; - - gnttab_set_map_op(&op, (unsigned long)blkif->blk_ring_area->addr, - GNTMAP_host_map, shared_page, blkif->domid); - - gnttab_check_GNTST_eagain_do_while(GNTTABOP_map_grant_ref, &op); - - if (op.status == GNTST_okay) { - blkif->shmem_ref = shared_page; - blkif->shmem_handle = op.handle; -...

I''m having problems starting more than three domains. It sometimes works fine, but more often than not the 4th domain''s root block device times out and so the domU kernel panics as there''s no /dev/root: XENBUS: Timeout connecting to device: device/vbd/2057 (state 6) XENBUS: Timeout connecting to device: device/vif/0 (state 6) XENBUS: Timeout connecting to device:

...enbus_map_ring(struct xenbus_device *dev, int gnt_ref, - grant_handle_t *handle, void *vaddr) +int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref[], int nr_grefs, + grant_handle_t handle[], void *vaddr) { - struct gnttab_map_grant_ref op; - - gnttab_set_map_op(&op, (phys_addr_t)vaddr, GNTMAP_host_map, gnt_ref, - dev->otherend_id); + struct gnttab_map_grant_ref op[XENBUS_MAX_RING_PAGES]; + int i; + int err = GNTST_okay; /* 0 */ + + for (i = 0; i < nr_grefs; i++) { + unsigned long ad...

...enbus_map_ring(struct xenbus_device *dev, int gnt_ref, - grant_handle_t *handle, void *vaddr) +int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref[], int nr_grefs, + grant_handle_t handle[], void *vaddr) { - struct gnttab_map_grant_ref op; - - gnttab_set_map_op(&op, (phys_addr_t)vaddr, GNTMAP_host_map, gnt_ref, - dev->otherend_id); + struct gnttab_map_grant_ref op[XENBUS_MAX_RING_PAGES]; + int i; + int err = GNTST_okay; /* 0 */ + + for (i = 0; i < nr_grefs; i++) { + unsigned long ad...

...enbus_map_ring(struct xenbus_device *dev, int gnt_ref, - grant_handle_t *handle, void *vaddr) +int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref[], int nr_grefs, + grant_handle_t handle[], void *vaddr) { - struct gnttab_map_grant_ref op; - - gnttab_set_map_op(&op, (phys_addr_t)vaddr, GNTMAP_host_map, gnt_ref, - dev->otherend_id); + struct gnttab_map_grant_ref op[XENBUS_MAX_RING_PAGES]; + int i; + int err = GNTST_okay; /* 0 */ + + for (i = 0; i < nr_grefs; i++) { + unsigned long ad...

..., i); + addr = vaddr(pending_req, i); + pages_to_gnt[i] = blkbk->pending_page(pending_req, i); + } + flags = GNTMAP_host_map; - if (pending_req->operation != BLKIF_OP_READ) + if (!use_pers_gnts && (pending_req->operation != BLKIF_OP_READ)) flags |= GNTMAP_readonly; - gnttab_set_map_op(&map[i], vaddr(pending_req, i), flags, - req->u.rw.seg[i].gref, - pending_req->blkif->domid); + if (new_map) { + gnttab_set_map_op(&map[segs_to_init++], addr, + flags, req->u.rw.seg[i].gref, + pending_req->blkif->domid); + } } - ret = gnttab_m...

...gnttab_map_grant_ref *map = pending_req->map; int i; int nseg = req->u.rw.nr_segments; int ret = 0; @@ -362,7 +391,7 @@ static int xen_blkbk_map(struct blkif_request *req, if (pending_req->operation != BLKIF_OP_READ) flags |= GNTMAP_readonly; gnttab_set_map_op(&map[i], vaddr(pending_req, i), flags, - req->u.rw.seg[i].gref, + seg_req[i].gref, pending_req->blkif->domid); } @@ -387,14 +416,15 @@ static int xen_blkbk_map(struct blkif_request *req, continue;...

pvSCSI backend driver Signed-off-by: Tomonari Horikoshi <t.horikoshi@jp.fujitsu.com> Signed-off-by: Jun Kamada <kama@jp.fujitsu.com> ----- Jun Kamada _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

A character device for accessing (in user-space) pages that have been granted by other domains. Signed-off-by: Derek Murray <Derek.Murray@cl.cam.ac.uk> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel