El 20/05/15 a les 15.21, Julien Grall ha escrit: > Hi, > > On 20/05/15 14:10, Bob Liu wrote: >> --- >> drivers/block/xen-blkback/blkback.c | 12 ++++ >> drivers/block/xen-blkback/common.h | 3 +- >> drivers/block/xen-blkback/xenbus.c | 85 +++++++++++++++++++++------- >> drivers/block/xen-blkfront.c | 110 >> ++++++++++++++++++++++++++---------- >> 4 files changed, 161 insertions(+), 49 deletions(-) >> >> diff --git a/drivers/block/xen-blkback/blkback.c >> b/drivers/block/xen-blkback/blkback.c >> index 713fc9f..057890f 100644 >> --- a/drivers/block/xen-blkback/blkback.c >> +++ b/drivers/block/xen-blkback/blkback.c >> @@ -84,6 +84,12 @@ MODULE_PARM_DESC(max_persistent_grants, >> "Maximum number of grants to map persistently"); >> >> /* >> + * Maximum number of pages to be used as the ring between front and backend >> + */ >> +unsigned int xen_blkif_max_ring_order = XENBUS_MAX_RING_PAGE_ORDER; > > We will soon support 64KB page granularity with ARM64, although the PV > protocol will keep a 4KB page granularity. > > Can you clarify with granularity is used here? The one of the host or > the one of the PV protocol?
It's using 4K pages, because those are then granted to the domain handling the backend. Roger. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
