spdk_vtophys() takes a mapping_length parameter, so
it can return the length for which the returned
virtual address is valid.
But spdk_vtophys() will only return the max
between the valid length and the input mapping_length
parameter.
So the nvme SGL building code for contiguous buffers
was broken, since it would only set the mapping_length
once, before the loop started. Worst case, if a buffer
started just before (maybe 256 bytes) before a huge page
boundary, each time through the loop we would create
a new SGL for only 256 bytes at a time, very quickly
running out of SGL entries for a large buffer.
Fixes#1852.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ib1000d8b130e8e4bfeacccd6e60f8109428dfc1e
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7659
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
5354d0c63f