Fix an issue with the dynamic pcpu/vnet data allocators.

We cannot expect that modspace is the last entry in the linker
set and thus that modspace + possible extra space up to PAGE_SIZE
would be contiguous.  For the moment do not support more than
*_MODMIN space and ignore the extra space (*).

(*) We know how to get it back but it'll need testing.

Discussed with:	jeff, rwatson (briefly)
Reviewed by:	jeff
Sponsored by:	The FreeBSD Foundation
Sponsored by:	CK Software GmbH
MFC after:	4 days

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/net/vnet.c b/sys/net/vnet.c
index 8013f5e..fb0db34 100644
--- a/sys/net/vnet.c
+++ b/sys/net/vnet.c
@@ -348,7 +348,7 @@ vnet_data_startup(void *dummy __unused)
 
 	df = malloc(sizeof(*df), M_VNET_DATA_FREE, M_WAITOK | M_ZERO);
 	df->vnd_start = (uintptr_t)&VNET_NAME(modspace);
-	df->vnd_len = VNET_MODSIZE;
+	df->vnd_len = VNET_MODMIN;
 	TAILQ_INSERT_HEAD(&vnet_data_free_head, df, vnd_link);
 	sx_init(&vnet_data_free_lock, "vnet_data alloc lock");
 }