Establish a convention that the first, lowest-index, region on the e820 bus always enables in fsdax mode without need for an nd_pfn instance. This is in preparation for a defining a collision test that requires multiple section-mis-aligned regions defined by memmap=nn!ss.
Signed-off-by: Dan Williams <[email protected]> --- test/dax-dev.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/test/dax-dev.c b/test/dax-dev.c index 0183b7af2052..49ccaa334e31 100644 --- a/test/dax-dev.c +++ b/test/dax-dev.c @@ -33,17 +33,28 @@ struct ndctl_namespace *ndctl_get_test_dev(struct ndctl_ctx *ctx) struct ndctl_bus *bus; struct ndctl_dax *dax; struct ndctl_pfn *pfn; - struct ndctl_region *region; struct ndctl_namespace *ndns; enum ndctl_namespace_mode mode; + struct ndctl_region *region, *min = NULL; bus = ndctl_bus_get_by_provider(ctx, "e820"); if (!bus) goto out; - region = ndctl_region_get_first(bus); - if (!region) + ndctl_region_foreach(bus, region) { + if (!min) { + min = region; + continue; + } + if (ndctl_region_get_id(region) < ndctl_region_get_id(min)) + min = region; + } + if (!min) goto out; + region = min; + + /* attempt to re-enable the region if a previous test disabled it */ + ndctl_region_enable(region); ndns = ndctl_namespace_get_first(region); if (!ndns) _______________________________________________ Linux-nvdimm mailing list [email protected] https://lists.01.org/mailman/listinfo/linux-nvdimm
